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Avaya Configuring IP Utilities (308631-14.20 Rev 00) User's Manual

1. You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose IP The IP menu opens 3 Choose NetBIOS The NetBIOS menu opens continued 308631 14 20 Rev 00 8 9 Configuring IP Utilities Site Manager Procedure continued 4 You do this Choose Interfaces System responds The NetBIOS IP Interface Table window opens Click on the IP interface that you want to modify Set the Enable Disable parameter Click on Help or see the parameter description on page A 25 The parameter values for that interface appear in the window Click on Apply then click on Done You return to the Configuration Manager window Disabling and Reenabling Name Caching on the Interface By default NetBIOS name caching is enabled on the interface You can disable name caching if you want to release system memory and processing resources otherwise dedicated to server name caching To disable or reenable this interface for caching the name of each NetBIOS server active in the network complete the following tasks using Site Manager Site Manager Procedure You do this 1 In the Configuration Manager window choose Protocols System responds The Protocols menu opens Choose IP The IP menu opens 3 Choose NetBIOS The NetBIOS menu opens 4 Choose Interfaces The NetBIOS IP Interface Ta
2. 6 Click on OK You return to the Configuration Manager window 308631 14 20 Rev 00 3 5 Configuring IP Utilities Setting the Maximum Window Size You can specify a value in bytes to determine the maximum transmit and receive window size that TCP allows for each connection The larger the window size the more memory each TCP connection consumes Using the BCC By default TCP sets the maximum window size to 4096 bytes To specify the maximum window size navigate to the TCP prompt for example ip tcp and enter max win lt integer gt integer is a value from 512 to 65 535 bytes Note When specifying a maximum window size do not use a comma in the value For example the following command sets the value for the maximum window size to 1050 bytes tcp max win 1050 tcp Using Site Manager To set the maximum window size in bytes that TCP allows for each connection complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Edit TCP Global Parameters window choose Protocols opens Choose Global Protocols The Global Protocols menu opens 3 Choose TCP The TCP menu opens 4 Choose Global The Edit TCP Global Parameters window opens continued 3 6 308631 14 20 Rev 00 Customizing TCP Services Site Manager Procedure continued You do this 5 Set the Max Window Size byte
3. V Verbose Debug Logging parameter Telnet client 6 24 A 16 WwW window size TCP for FTP 4 10 general 2 5 maximum setting 3 6 Index 6 308631 14 20 Rev 00
4. You return to the Configuration Manager window 308631 14 20 Rev 00 Configuring IP Utilities Specifying Whether a MIB Instance Is Created for Each Cached Name By default NetBIOS creates a MIB instance for each name entry stored in the name cache You can disable this feature if you want to release system memory and processing resources otherwise dedicated to maintaining cached names in the MIB To specify whether or not you want to have a MIB instances created for each name entry in the name cache complete the following tasks using Site Manager Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose IP The IP menu opens 3 Choose NetBIOS The NetBIOS menu opens 4 Choose Global The Edit NetBIOS IP Global Parameters window opens 5 Set the Create MIB Inst for Cached Name parameter Click on Help or see the parameter description on page A 22 6 Click on OK You return to the Configuration Manager window Specifying the Size of the Name Cache By default NetBIOS allocates space for 100 entries in the name cache You can adjust this value in direct proportion to the total number of server names expected to be active during intervals of peak traffic load or performance demand on the router A value of 100 is suitable for networks that include up to 100 NetBIOS names to cache You can spe
5. 308631 14 20 Rev 00 7 15 Configuring IP Utilities Using Site Manager To delete NTP from the router complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose Global Protocols The IP menu opens 3 Choose NTP The NTP menu opens 4 Choose Delete NTP A message box prompts Do you REALLY want to delete NTP 5 Click on OK Site Manager deletes NTP 7 16 308631 14 20 Rev 00 Chapter 8 Customizing NetBIOS over IP This chapter describes how to customize NetBIOS over IP services on the router It assumes you have configured IP on an interface and started NetBIOS using the default parameters as described in Chapter 1 Starting IP Utilities and that you understand the NetBIOS over IP concepts described in Chapter 2 Overview of IP Utilities After you start NetBIOS over IP on the router default values are in effect for all NetBIOS parameters You customize NetBIOS over IP by modifying these parameters as described in the following sections Topic Page Disabling and Reenabling NetBIOS on the Router 8 2 Configuring a NetBIOS Cache 8 2 Specifying a TTL Value for a Rebroadcast Packet 8 8 Customizing NetBIOS on an IP Interface 8 9 Configuring a Static NetBIOS Name and Address 8 12 Adding a Traffic Filter to a NetBIOS Inte
6. 308631 14 20 Rev 00 Configuring IP Utilities Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Command Timeout min Configuration Manager gt Protocols gt Global Protocols gt Telnet Server gt Global 15 1 to 99 minutes 99 infinity Specifies the number of minutes that can elapse before the Technician Interface disconnects the Telnet session if you do not enter a command at the command prompt Accept the default value 15 minutes or specify a different value 1 3 6 1 4 1 18 3 5 3 7 1 8 Login Retries Configuration Manager gt Protocols gt Global Protocols gt Telnet Server gt Global 3 1 to 99 login attempts Specifies the maximum number of login attempts allowed before the Technician Interface disconnects the Telnet session Accept the default value 3 or specify a different value 1 3 6 1 4 1 18 3 5 3 7 1 9 Diagnostic Report Configuration Manager gt Protocols gt Global Protocols gt Telnet Server gt Global Disable Enable Disable Specifies whether the Technician Interface displays a record of processing operations Used for diagnostic purposes only Accept the default Disable This parameter is for field service personnel only 1 3 6 1 4 1 18 3 5 3 7 1 15 308631 14 20 Rev 00
7. Default Options Function Instructions MIB Object ID Max Retransmissions Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Proxy gt Add 2 Oto 15 Specifies the maximum number of times that the DNS proxy can retransmit a request to the DNS server before recording an error Accept the default or enter a value from 0 to 15 Entering a high value may delay router response time when errors occur 1 3 6 1 4 1 18 3 5 3 19 3 1 13 Max Outstanding Req Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Proxy gt Add 20 1 to 100 Specifies the maximum number of outstanding queries to the server that the DNS proxy allows Accept the default or enter a value from 1 to 100 If you select a high value be sure that the router has enough memory to accommodate the number of outstanding queries that you specify 1 3 6 1 4 1 18 3 5 3 19 3 1 14 Answer Truncation Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Proxy gt Add Disable Enable Disable Specifies whether the DNS proxy can truncate the number of DNS answers Accept the default Disable to prohibit the DNS proxy from truncating the number of DNS answers To allow truncation set this parameter to Enable 1 3 6 1 4 1 18 3 5 3 19 3 1 15 A 38 308631 14 20 Rev 00 Parameter Path Default Options Function Instructions MIB Object ID Parameter Path D
8. 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose Global Protocols The Global Protocols menu opens 3 Choose Telnet Server The Telnet Server menu opens 4 Choose Global The Telnet Server Global Parameters window opens Set the TI More parameter Click on Help or see the parameter description on page A 10 Click on OK Site Manager saves your changes and exits the window 6 10 308631 14 20 Rev 00 Changing the Telnet Login Prompt Customizing Telnet Services You can change the Telnet login prompt on the Telnet console screen by specifying a character string from 1 through 18 alphanumeric characters Using the BCC To change the Telnet login prompt on the Telnet console screen navigate to the server specific prompt and enter prompt lt string gt string is any text string from 1 to 18 characters For example the following command changes the Telnet login prompt to rtr1 server prompt rtr1 server Using Site Manager To change the Telnet login prompt on the Telnet console screen complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose Global Protocols The Global Protocols menu opens 3 Choose Telnet Server The Telnet Server menu opens 4 Choose G
9. A 27 7 Click on Apply then click on Done You return to the Configuration Manager window Adding a Traffic Filter to a NetBIOS Interface If name caching is enabled a router that receives a name query response originating from a server and addressed to a client must be able to deliver the message to the NetBIOS entity on the router rather than simply forward it out another interface toward its destination To enable the router to recognize a unicast IP packet that contains a name query response and pass it to NetBIOS through UDP port 137 you must configure a traffic filter on each NetBIOS interface that receives unicast name query responses 8 14 308631 14 20 Rev 00 Customizing NetBIOS over IP To add a traffic filter to a NetBIOS interface complete the following tasks using Site Manager Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Circuits menu opens choose Circuits 2 Choose Edit The Circuit List window opens 3 Click on Edit The Circuit Definition window open 4 Choose Protocols The Protocols menu opens 5 Choose Edit IP The Edit IP menu opens 6 Choose Traffic Filters The IP Filters window opens 7 Click on Template The Filter Template Management window opens 8 Click on Create The Create IP Template window opens 9 Choose Criteria The Criteria menu opens 10 Choose Add Th
10. Specifies the IP address of the remote time server peer that you want to configure NTP adds the IP address of the remote time server to a peer list NTP uses this peer list when querying remote time servers for time information to determine the best remote time server from which to synchronize its internal clock Specify the IP address of the remote time server peer 1 3 6 1 4 1 18 3 5 3 17 3 1 6 Access IP Address Configuration Manager gt Protocols gt Global Protocols gt NTP gt Access gt Add None 0 0 0 0 or any valid IP address Allows you to configure the source IP address of the remote time server whose access to the NTP local NTP client you want to restrict Enter the IP address of the remote time server whose access you want to restrict 1 3 6 1 4 1 18 3 5 3 17 2 1 3 A 18 308631 14 20 Rev 00 Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Site Manager Parameters Filter Type Configuration Manager gt Protocols gt Global Protocols gt NTP gt Access Restrict Restrict Prefer Specifies whether to drop or accept inbound NTP timestamps destined for a local NTP client The local NTP client will filter packets from a remote time server whose IP address you have restricted based on its source IP
11. e Disabled User has manually disabled NTP e Up NTP is operating on the router e Down NTP is not functioning on the router e Init NTP is initializing on the router e Not Present NTP has been configured but not started on the router Current version of NTP software on the router IP address of the remote NTP peer that is the system peer to which the local NTP client is synchronized Number of NTP peers that exist between the local NTP client and the NTP stratum 1 server for this network The stratum number includes the local NTP client The show ntp peers command displays configuration and status information about NTP servers known to the NTP client on the router The output includes the following information IP Address Peer Mode State Ref ID Preferred IP address of this remote NTP peer Mode in which this remote NTP peer operates on the network Server Because NTP operates locally in client mode only all remote peers known to the router are servers State of the remote NTP server e 1 Up e 2 Down IP address of the system peer to which this remote NTP peer is synchronized e Preferred Local NTP client prefers accepts packets from this remote NTP server e Not Preferred Local NTP client does not prefer rejects packets from this remote NTP server 308631 14 20 Rev 00 Configuring IP Utilities show ntp stats show tcp connections The show ntp stats command
12. on page 1 2 Started the BayRS DNS client and specified at least one DNS server for the router for instructions see Starting the DNS Client and Specifying Its First DNS Server on page 1 14 Understood the DNS concepts as described in DNS Overview on page 2 24 After you start DNS services on the router default values are in effect for all DNS parameters You customize DNS client services by modifying these parameters as described in the following sections Topic Page Disabling and Reenabling DNS Client Services on the Router 9 2 Modifying the DNS Client Configuration 9 3 Disabling the Recursion Bit 9 5 Modifying How the DNS Client Handles Server Responses 9 7 Changing the DNS Server List for the DNS Client 9 8 Deleting DNS Client Services from the Router 9 11 308631 14 20 Rev 00 9 1 Configuring IP Utilities Disabling and Reenabling DNS Client Services on the Router You can disable or reenable DNS client services on all circuits on the router using the BCC or Site Manager By default DNS client services are enabled on the router Using the BCC To disable DNS client services on the router navigate to the DNS prompt for example box dns and enter disable For example dns disable dns state state disabled To reenable DNS client services on the router navigate to the DNS prompt and enter enable For example dns enable dns state
13. 250 100 through 15000 ms Sets the minimum value for the retransmission timeout When one side of a TCP connection sends a frame and does not receive an acknowledgment from the other side of the connection within the timeout period the sending station retransmits the frame Specify the value you want to use for the minimum timeout period If you are transmitting on a high speed network and you set the parameter value too high network performance may degrade because TCP must wait for the timeout period to elapse before retransmitting unacknowledged data 1 3 6 1 4 1 18 3 5 3 3 1 5 308631 14 20 Rev 00 A 3 Configuring IP Utilities Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Max Retransmission Timeout msec Configuration Manager gt Protocols gt Global Protocols gt TCP gt Global 240000 15000 to 240000 ms Sets the maximum value for the retransmission timeout When one side of a TCP connection sends a frame and does not receive an acknowledgment from the other side of the connection within the timeout period the sending station retransmits the frame Specify the value you want to use for the maximum timeout period If you are transmitting on a low speed network and you set the parameter value too low the network may become congested as TCP retransmits unacknowledged frames that have not y
14. Enable Enable Disable Specifies whether Telnet is enabled for the IP router allowing you to establish incoming Telnet sessions to the Technician Interface Select Enable to enable Telnet for the IP router Select Disable to disable Telnet for the IP router 1 3 6 1 4 1 18 3 5 3 7 1 2 308631 14 20 Rev 00 A 9 Configuring IP Utilities Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID TI Lines per Screen Configuration Manager gt Protocols gt Global Protocols gt Telnet Server gt Global 24 1 to 24 lines Specifies the maximum number of lines displayed on the Telnet Technician Interface console screen The screen may override the number of lines you specify if Telnet can negotiate the window size with the remote client Set according to your console requirements 1 3 6 1 4 1 18 3 5 3 7 1 3 TI More Configuration Manager gt Protocols gt Global Protocols gt Telnet Server gt Global Enable Enable Disable Specifies whether the Technician Interface pauses after each screen fills with data Select Enable to configure the Technician Interface to pause after each screen fills with data Select Disable to configure the Technician Interface not to pause after each screen fills with data 1 3 6 1 4 1 18 3 5 3 7 1 4 A 10 308631 14 20 Rev 00 Parameter Path Default Optio
15. For example a client might request the service www nortelnetworks com Because the client cannot connect to a name service it must translate this name to an IP address so that it can communicate over the network DNS is the mechanism that resolves the host name to an IP address Clients are typically configured with a list of DNS name servers to contact to resolve host names Due to network infrastructure changes Internet service providers and network administrators often change the IP addresses of these statically configured name servers When the IP addresses of these name servers change every network client must change its local configuration for the IP address of the new name servers Using a DNS proxy server minimizes the work for the system administrator Each client uses the IP address of the DNS proxy server instead of the true DNS servers The DNS proxy server contains the list of real name servers If the DNS servers change only the server list on the DNS proxy server must change Typically a network client has a default route specified to a local attached router Careful network planning can allow the DNS proxy server to be the same as this default route Setting up the DNS proxy server this way simplifies the task for a network administrator who does not need to know the list of DNS servers when configuring new clients By default the DNS proxy listens on UDP port 53 standard DNS server port of the IP interface on which it
16. If the sending host does not receive an acknowledgment within a set timeout interval the sending station retransmits the data TCP determines the timeout interval by estimating the average time it takes to send a segment and receive an acknowledgment for it 308631 14 20 Rev 00 2 3 Configuring IP Utilities Connection Types TCP is a connection oriented protocol that requires application programs at both ends of a connection to agree to it before TCP traffic can pass across a network To do so the application program at one end performs a passive open while the application program at the other end performs an active open For passive opens a TCP client the process or application program that uses TCP waits to accept incoming connection requests Clients using passive opens can listen for specific connection requests or for a range of inbound requests In an active open the client initiates the connection Once a connection has been created application programs can begin to pass data that is the programs at each end exchange messages that guarantee reliable delivery Connections and Connection States TCP establishes a set of access points referred to as ports for each host It associates each port with a network and host address to form a socket A pair of sockets together with sequence numbers window sizes and status information form a TCP connection Table 2 2 lists the states through which a TCP connection p
17. In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose Global Protocols The Global Protocols menu opens 3 Choose Telnet Client The Telnet Client menu opens 4 Choose Global The Edit Telnet Client Global Parameters window opens Set the Verbose Debug Logging parameter Click on Help or see the parameter description on page A 16 Click on OK You return to the Configuration Manager window Changing the Remote Port You can change the default remote Telnet server s TCP remote port by specifying a valid TCP port number By default the Telnet server s TCP remote port is 23 Using the BCC To change the remote port navigate to the client specific prompt and enter remote port lt integer gt integer is any valid TCP port number For example the following command changes the Telnet server s TCP remote port number to 20 client remote port 20 client 6 24 308631 14 20 Rev 00 Using Site Manager Customizing Telnet Services To change the remote Telnet server s TCP port complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose Global Protocols The Global Protocols menu opens 3 Choose Telnet Client The Telnet Client menu opens 4 Choose Global The Edit
18. MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Max Retransmission Configuration Manager gt Protocols gt Global Protocols gt DNS gt Create DNS Client 3 Oto 15 Specifies the maximum number of times that the router can retransmit a request to the DNS server before it records an error Accept the default or enter a value from 0 to 15 Entering a high value may delay router response time when errors occur 1 3 6 1 4 1 18 3 5 3 19 1 4 Max Outstanding Query Configuration Manager gt Protocols gt Global Protocols gt DNS gt Create DNS Client 20 1 to 100 Specifies the maximum number of outstanding queries to the server that the router allows Accept the default or enter a value from 1 to 100 If you select a high value be sure that the router has enough memory to accommodate the number of outstanding queries that you specify 1 3 6 1 4 1 18 3 5 3 19 1 5 A 30 308631 14 20 Rev 00 Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Site Manager Parameters Domain Name Configuration Manager gt Protocols gt Global Protocols gt DNS gt Create DNS Client None Any combination of up to 255 alphanumeric characters that specifies a network domain for example nortelnetworks com Specifies the default domain name that the router
19. Overview of IP Utilities Both devices involved in a TFTP transfer are senders and receivers One device sends data and receives acknowledgments the other device sends acknowledgments and receives data The IP router includes a client and server implementation of TFTP enabling the router to transmit and receive files across a network For information about creating TFTP on the router see Chapter 1 Starting IP Utilities For information about editing TFTP parameters see Chapter 5 Customizing TFTP Services Telnet Overview Telnet is a virtual terminal protocol that is part of the TCP IP protocol suite It allows you to access any system on your network running the Telnet server software Accessing Telnet establishes a virtual connection between your terminal and the specified host Once you connect to a host through Telnet your terminal appears to be connected directly to that host Telnet offers three basic services e It defines a network virtual terminal that provides a standard interface to remote systems Clients do not have to understand the details of all possible remote systems they are built to use the standard interface e It allows client and server to negotiate options and it provides a set of standard options e It treats both ends of the connection symmetrically So instead of forcing the client side to connect to a user s terminal Telnet allows an arbitrary program to become a client Furthermore
20. Overview of IP Utilities NTP Overview The Network Time Protocol NTP synchronizes the timing of internal clocks of various network devices across large diverse networks to universal standard time NTP runs over UDP which in turn runs over IP The NTP protocol specification is documented in RFC 1305 Each device on the network contains an internal system clock that is used to maintain accurate time for the device The internal system clock on most local devices is set by eye or by wristwatch to within a minute or two of the actual time and is rarely reset at regular intervals Many of these clocks are battery backed devices that use room temperature clock oscillators that can drift as much as several seconds each day NTP solves this problem by automatically adjusting the time of the devices so that they are synchronized within milliseconds The current implementation of NTP supports only NTP client mode In this mode the local NTP client which runs on a router accepts time information from other remote time servers and adjusts its clock accordingly However the NTP local client will not attempt to synchronize another device s clock NTP Terminology An NTP peer can be any device that runs NTP software However the current implementation of NTP refers to peers as remote time servers that provide time information to other time servers on the network and to the local NTP client An NTP client refers to the local network device in t
21. Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Site Manager Parameters Diagnostic Exercise Configuration Manager gt Protocols gt Global Protocols gt Telnet Server gt Global Disable Enable Disable Used for diagnostic purposes only Accept the default Disable This parameter is for field service personnel only 1 3 6 1 4 1 18 3 5 3 7 1 16 Diagnostic Network Data Configuration Manager gt Protocols gt Global Protocols gt Telnet Server gt Global Disable Enable Disable Specifies whether the Technician Interface displays Telnet protocol information Used for diagnostic purposes only Accept the default Disable This parameter is for field service personnel only 1 3 6 1 4 1 18 3 5 3 7 1 17 Diagnostic PTY Data Configuration Manager gt Protocols gt Global Protocols gt Telnet Server gt Global Disable Enable Disable Specifies whether the Technician Interface displays pseudo terminal driver PTY information Used for diagnostic purposes only Accept the default Disable This parameter is for field service personnel only 1 3 6 1 4 1 18 3 5 3 7 1 18 308631 14 20 Rev 00 Configuring IP Utilities Parameter Path Default Options Function Instructions MIB Object ID P
22. Startno NTP GEGE S aaria ernen a nAn E Aana TEE EEAO ASA EAEAN EONAR EEE 1 12 Starting NetBIOS over IP sce Ped wed E E E R 1 13 Starting the DNS Client and Specifying Its First DNS Server seese 1 14 Starting the DNS Proxy and Specifying Its First DNS Server neee sil Chapter 2 Overview of IP Utilities TER OVSE Rae a gee eee nee ere eS ere res EREE EAO ERNEA 2 1 How TCP Works aeia dite eutdugiureuniagudd sesignady petcduaddecusuaabaiy aadi 2 2 TOF Pestle aieiaa T een aaa ee 2 3 Conneccion DIOS pua candinestaceiyiemunieineerarniane peeiaa einen 2 4 Connections and Connection States cccccceeceeeeeeeeeeeeeeeneeeeeneeeneaes EEE 2 4 TOP Memory GA sssrini nnana enta ainiai 2 5 TOF amd iF cery USOS niini aaa ies Gat sa aac sca daub oindias een eee 2 6 308631 14 20 Rev 00 v FIF as src EE ces da ee tacs race EAA 2 7 HOR TEF WOKS ae acct ieee ica E 2 8 TRIP OV6IVIOW assii T niisiis iai ddios 2 10 EBETE ON sosio O 2 11 Toe SN noaei E 2 12 EEES E E E E E E A T O E IaeS 2 13 KNEE EN E S A E O E E A E A T E E A N 2 15 NTP Wry inricccin a aa 2 15 NTP System Implementation Medal suimesianemcnneniniia ea 2 15 How NTP Distributes Time Within the Subnet c cccceceseseeeeeeeeeeeeeteeeeeeaeeees 2 17 Synchronizing with the Best Available Time Server sige pabapatntntearaameennunaas 2 17 NTF Modes of Sc hy neem ere nee rene saai eter rere rn EE A EA 2 18 Unicast Client MOJE ci taisc
23. e Understood the DNS concepts as described in DNS Overview on page 2 24 After you start DNS proxy services on a router interface default values are in effect for all DNS proxy parameters You customize DNS proxy services by modifying these parameters as described in the following sections Topic Page Disabling and Reenabling DNS Proxy Services on a Router Interface 10 2 Modifying the DNS Proxy Configuration 10 3 Modifying the DNS Server List for DNS Proxy 10 6 Deleting DNS Proxy Services from a Router Interface 10 8 308631 14 20 Rev 00 10 1 Configuring IP Utilities Disabling and Reenabling DNS Proxy Services on a Router Interface You can disable or reenable DNS proxy services on a router interface using either the BCC or Site Manager By default DNS proxy is enabled Using the BCC To disable DNS proxy services on an interface navigate to the DNS proxy prompt for example box ethernet 2 1 ip 192 1 34 67 8 dns proxy and enter the following command disable For example dns proxy 192 1 34 67 disable dns proxy 192 1 34 67 state state disabled To reenable DNS proxy services on an interface navigate to the DNS proxy prompt and enter the following command enable For example dns proxy 192 1 34 67 enable dns proxy 192 1 34 67 state state enabled Using Site Manager To disable or reenable DNS proxy services on an interface complete the following
24. ftp max session 10 ftp 308631 14 20 Rev 00 4 7 Configuring IP Utilities Using Site Manager To specify the maximum number of FTP sessions you want to run at one time complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose Global Protocols The Global Protocols menu opens 3 Choose FTP The FTP menu opens 4 Choose Global The Edit FTP Global Parameters window opens 5 Set the Max Sessions parameter Click on Help or see the parameter description on page A 6 6 Click on OK You return to the Configuration Manager window Specifying the Type of Service for Data Transmission You can determine the type of data transmission you want to use to transfer your files whether ASCH or binary To specify the data transmission type you want to use use Site Manager to complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window select Protocols The Protocols menu opens 2 Choose Global Protocols The Global Protocols menu opens 3 Choose FTP The FTP menu opens 4 Choose Global The Edit FTP Global Parameters window opens continued 308631 14 20 Rev 00 Customizing FTP Services Site Manager Procedure cont
25. s 8 10 Disabling and Reenabling Inbound and Outbound Broadcasts c ssccceeeereees 8 11 Supplying a Rebrgadcast AGG SS x cic ccc sccetasercececneatychcacmmasviesiemetieademeeneccead tee 8 12 Configuring a Static NetBIOS Name and Address cccceeeeeeeeeeeeeeeseeeeneeeseeeteaes 8 12 Creating the NetBIOS Static Entry ee ce re ree T Areara 8 12 Disabling and Reenabling Static Name Caching EE ie 8 14 Adding a Traffic Filter to a NetBIOS Interface cccccccceessceeeeeesseeeeessneaeeeesssteeeeeesenea 8 14 Deleting NetBIOS from the Router ccccccceseeeeeeseeeeeeeeeseeeeenes EE E 8 16 Chapter 9 Customizing the DNS Client Disabling and Reenabling DNS Client Services on the Router nsss 9 2 Modifying the DNS Client Configuration eeeseeeeeeeeeeeeeeeeerererreererenn EEE 9 3 Timeout Considerations for DNS Clients Served by DNS Piy E T ETE 9 3 Disabling the Recursion BW sssceipscsiacceasscssnaicas tie imedaieseceacsesaiaie citinia asap ented 9 5 Modifying How the DNS Client Handles Server Reamunsse ieee ena Changing the DNS Server List for the DNS Client 0 ec ceceeceeeeeeeeeeeeeeereeeeteeeeeeeaeeaees 9 8 Displaying the DNS Server List for the DNS Client cccceeeeseeeeeseeeeeeeeeeeeeeeeees 9 8 Adding Entries to the DNS Server List for the DNS Client ccccsccccesesseeeeeeeeee 9 9 Deleting Entries from the DNS Server List ccscceeseeeeeeeeeeeeeeeee
26. state enabled Using Site Manager To disable or reenable the DNS client on the router complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose Global Protocols The Global Protocols menu opens 3 Choose DNS The DNS menu opens 4 Choose Global The Edit DNS Global Parameters window opens continued 9 2 308631 14 20 Rev 00 Customizing the DNS Client Site Manager Procedure continued You do this System responds 5 Set the Enable parameter Click on Help or see the parameter description on page A 29 6 Click on OK You return to the Configuration Manager window Modifying the DNS Client Configuration You can modify how the router makes requests to the DNS server for example how often requests are repeated and how long the client router waits between requests Timeout Considerations for DNS Clients Served by DNS Proxy When determining a value for the DNS client Timeout parameter you must consider whether the DNS client contains an IP address of an interface configured with DNS proxy If DNS client will interact with DNS proxy be sure to set the timeout value so that it allows for the maximum time that the DNS proxy takes to cycle through each uncommunicative configured DNS server until DNS proxy encounters a server that is up You can assign
27. tep and enter disable For example tcp disable tcp state state disabled To reenable TCP navigate to the TCP prompt and enter enable For example tcp enable tcp state state enabled Using Site Manager To disable and reenable TCP on the router complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose Global Protocols The Global Protocols menu opens 3 Choose TCP The TCP menu opens 4 Choose Global The Edit TCP Global Parameters window opens continued 3 2 308631 14 20 Rev 00 Customizing TCP Services Site Manager Procedure continued You do this System responds 5 Set the Enable Disable parameter Click on Help or see the parameter description on page A 5 6 Click on OK You return to the Configuration Manager window Setting the Minimum Retransmission Timeout You can specify a minimum value for the retransmission timeout When one side of a TCP connection sends a frame and does not receive an acknowledgment from the other side of the connection within the timeout period the sending station retransmits the frame If you are transmitting on a high speed network and you set the minimum retransmission timeout value too high network performance may degrade because TCP must wait for the timeout period to elapse before retran
28. the following command sets the maximum number of lines displayed on a Telnet console screen to 50 server lines 50 server Using Site Manager To specify the maximum number of lines displayed on a Telnet console screen complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose Global Protocols The Global Protocols menu opens 3 Choose Telnet Server The Telnet Server menu opens 4 Choose Global The Telnet Server Global Parameters window opens 5 Set the TI Lines per Screen parameter Click on Help or see the parameter description on page A 10 6 Click on OK Site Manager saves your changes and exits the window 308631 14 20 Rev 00 6 9 Configuring IP Utilities Pausing Telnet Console Output By default Telnet console output pauses after each screen fills with data You can configure Telnet not to pause after each screen fills with data by disabling this feature Using the BCC To configure the Telnet console output to pause navigate to the Telnet specific prompt and enter more For example the following command prevents Telnet console output from pausing server more disabled server Using Site Manager To specify whether to pause Telnet console output complete the following tasks Site Manager Procedure You do this System responds
29. the other side of the connection within the timeout period the sending station retransmits the frame If you are transmitting on a low speed network and you set the maximum retransmission timeout value too low the network may become congested as TCP retransmits unacknowledged frames that have not yet reached their destination 3 4 308631 14 20 Rev 00 Customizing TCP Services Using the BCC By default TCP sets the maximum retransmission value to 240 000 ms To specify a value for the minimum retransmission timeout navigate to the TCP prompt for example ip tep and enter max rto lt integer gt integer is a value from 15 000 to 240 000 ms Note When specifying a maximum retransmission timeout value do not use a comma in the value For example the following command sets the value for the maximum retransmission timeout to 235 000 ms tcp max rto 235000 tcp Using Site Manager Complete the tasks in the following table to specify a maximum value for the retransmission timeout Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose Global Protocols The Global Protocols menu opens 3 Choose TCP The TCP menu opens 4 Choose Global The Edit TCP Global Parameters window opens 5 Set the Max Retransmission Timeout msec parameter Click on Help or see the parameter description on page A 4
30. 14 20 Rev 00 D 1 Configuring IP Utilities Online Help for show Commands To display a list of command options enter one of these commands at any BCC prompt e show dns e show ftp e show ntp e show tcp e show telnet e show tftp To learn more about any show command option and its syntax use the question mark command as follows Example bec gt show ntp access base peers stats bcc gt show ntp peers show ntp peers No further options available bec gt show dns server The show dns server command displays information about the DNS servers configured for the DNS client on the router The output includes the following information Server Number of the server from 1 to 3 Address IP address of the DNS server Port Port that the DNS server uses The default port is 53 308631 14 20 Rev 00 show dns stats BCC show Commands The show dns stats command displays the DNS counters The output includes the following information Queries sent Responses received Non authoritative responses Empty responses Unknown server responses Unparseable responses Retransmits Time outs Receive errors Local errors show ftp Number of queries sent Number of responses received Number of nonauthoritative cached data responses Number of responses containing no data Number of unsolicited responses received from servers Number of responses received that were unparseable Number of packet
31. 18 IP Mask parameter NTP 7 15 A 19 L Local Host Mode parameter NTP 7 8 A 20 Login Retries parameter FTP 4 5 A 5 Login Retries parameter Telnet server 6 16 A 12 Login Timeout parameter Telnet server 6 12 A 11 M Manager s Login Script parameter Telnet server 6 4 A 14 Max Name Cache Entries parameter NetBIOS 8 5 A 23 Max Outstanding Query parameter DNS client 9 5 A 30 Max Retransmission parameter DNS client 9 5 A 30 Max Outstanding Req parameter DNS proxy A 38 Max Retransmission Timeout parameter TCP 3 5 A 4 Max Retransmissions parameter DNS proxy 10 6 A 38 Max Sessions parameter FTP 4 8 A 6 Max Window Size parameter TCP 2 5 3 7 A 4 memory and number of Telnet connections 2 12 considerations for configuring TCP 2 5 Min Retransmission Timeout parameter TCP 3 4 A 3 Mode parameter NTP 7 4 A 18 Name Cache Age parameter NetBIOS 8 6 A 23 NetBIOS Name Caching parameter global 8 3 A 22 interface 8 10 A 26 Index 3 NetBIOS over IP broadcasts disabling 8 11 reenabling 8 11 cache entry aging 8 5 configuring 8 2 cache search customizing 8 6 deleting 8 16 disabling interface 8 9 disabling on router 8 2 enabling 1 13 global parameters Site Manager A 21 interface parameters Site Manager A 25 MIB instance for cached name 8 4 name caching disabling on interface 8 10 enabling on router 8 3 reenabling on interf
32. 5 seconds 308631 14 20 Rev 00 Customizing the DNS Proxy For example the following commands change the defaults of how the router sends DNS proxy requests and then the info command checks the settings 34 67 answer truncation enabled 34 67 domain name nortelnetworks com 34 67 fwd port 53 34 67 max answers truncated 10 34 67 max cache size 10 34 67 max queries allowed 10 34 67 max retransmissions 10 34 67 mode nat translation dns proxy 192 1 34 67 port 53 dns proxy 192 1 34 67 timeout 20 dns proxy 192 1 34 67 info answer truncation disabled domain name nortelnetworks com fwd port 53 fwd serverl address 32 6 17 89 fwd server2 address 67 54 129 8 fwd server3 address 0 0 0 0 max answers truncated 10 max cache size 10 max queries allowed 10 max retransmissions 10 mode nat translation port 53 state enabled timeout 20 dns proxy 192 dns proxy 192 dns proxy 192 dns proxy 192 dns proxy 192 dns proxy 192 dns proxy 192 dns proxy 192 PRPRPRPRPPRRPER Using Site Manager To modify how the DNS proxy on the router handles DNS requests complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols Choose Global Protocols The Global Protocols menu opens Choose DNS The DNS menu opens Choose DNS Proxy The DNS Proxy List window opens continue
33. 8 Customizing NetBIOS over IP Before you begin verify that IP is configured on a router interface For instructions see Verifying that IP Is Configured on a Router Interface on page 1 5 If IP is not yet configured see Configuring IP for Global Protocols on page 1 2 for instructions To start NetBIOS over IP complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Edit Connector window opens click on the connector to which you want to add NetBIOS services 2 Click on Edit Circuit The Circuit Definition window opens 3 Choose Protocols The Protocols menu opens 4 Choose Add Delete The Select Protocols window opens 5 Click on NetBIOS continued 308631 14 20 Rev 00 1 13 Configuring IP Utilities Site Manager Procedure continued You do this System responds 6 Click on OK You return to the Circuit Definition window 7 Choose File The File menu opens 8 Choose Exit You return to the Configuration Manager window Starting the DNS Client and Specifying Its First DNS Server You can use the BCC or Site Manager to configure DNS client services on the router accepting default values for all parameters By default the created DNS client is enabled If you decide to change some or all of the default values see Chapter 9 Customizing the DNS Client Aft
34. 9 11 disabling 9 2 DNS servers contacting alternate 9 5 deleting 9 10 displaying list of 9 8 specifying first 1 14 specifying multiple 9 9 enabling 1 14 parameters Site Manager A 29 reenabling 9 2 server requests customizing 9 3 server responses 9 7 starting 1 14 timeout considerations 9 3 DNS proxy bidirectional NAT requirement for 1 17 cache entries 2 26 customizing 10 1 deleting 10 8 disabling 10 2 DNS servers changing IP address 10 7 specifying first 1 17 specifying multiple 10 6 enabling 1 17 how it works 2 25 interface specifying A 35 overview 2 24 parameters Site Manager A 34 reenabling 10 2 starting 1 17 timeout considerations 10 3 DNS server client requests customizing 9 3 for DNS client deleting 9 10 displaying list of 9 8 specifying first 1 14 specifying multiple 9 9 for DNS proxy changing IP address 10 7 specifying first 1 17 specifying multiple 10 6 responses ensuring 9 5 Index 2 DNS Server 1 parameter DNS proxy 10 8 A 36 DNS Server 2 parameter DNS proxy 10 8 A 36 DNS Server 3 parameter DNS proxy 10 8 A 37 DNS Server Port Number parameter DNS proxy 10 6 A 37 Domain Name parameter DNS client 9 5 A 31 Domain Name parameter DNS proxy 10 6 A 36 E Enable NetBIOS Inbound Broadcasts parameter NetBIOS 8 11 A 26 Enable NetBIOS Outbound Broadcasts parameter NetBIOS 8 11 A 26 Enable parameter DNS
35. Enabling Disghostie OPONE iunie aisr entener Rna A N AAE 6 19 Changiag the FIP FIE osaisia aanika ondcrasadenedsbadacagitoraelciannasd 6 19 Deleting Telnet Server from the Router eee dinidan Senier a ina Na 6 21 Gusiomizmng a Telnet Glen vannin Sindee tia A ease 6 22 Disabling and Reenabling a Telnet Client on the IP Router ceeeee masO 22 Enabling and Disabling Verbose Debug Logging episod pameenncepammensaaies siaina 6 23 Changia Me Remote PW arsenas kaaa a nanai dee Nania 6 24 Changing the Command Prompt 05 ee P T E E E eee 6 25 Deleting Telnet Client from the Router cceeceeeeseeeeeeeeeeeeeeseaeeeeeaeeteteettseeess 6 26 Chapter 7 Customizing NTP Services Configuring NTP Using the BCC or Site Manager mekassa E errr eee go Disabling ahd Reenabling AL gave eee erence ere ney cetatet Serpent year rrr seer ererrerstery reer tr vere 7 2 Setting the NTP Operation Mode 008 A Ga eee es 7 3 Configuring Remote Tine Servers cassius a a os Meee 7 4 Adding Remote Time Servers ssssossessesesssrresrrserrnernsstrnerrnarrnnetinesrenereessrenrrenerent 7 5 Setting the Mode for a Remote Time Server ccccceeeseeeeeeeeeeeneeeteneeeeeneeeeeseeeees 7 6 melting ocal Host MOIE iirrainn arne aren ENa 7 8 Specifying the Source IP Agere es orrasidinidaii naana inakiea 7 8 Specifying Peer PreferengE sacscicceececdeetecseccacieerscces esate iiau nsainai nina E
36. FTP gt Global Binary Binary ASCII Specifies the current data transmission type To transfer files consisting of ASCII characters specify ASCII transmission For non ASCII files specify Binary 1 3 6 1 4 1 18 3 5 3 10 1 7 A 6 308631 14 20 Rev 00 Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Site Manager Parameters Control Connection Configuration Manager gt Protocols gt Global Protocols gt FTP gt Global Low Delay Normal Low Delay Specifies the Type of Service value that FTP inserts in IP datagrams on a control connection Choose the option that determines how the Internet transport layer handles datagrams on a control connection 1 3 6 1 4 1 18 3 5 3 10 1 8 Data Transfer Configuration Manager gt Protocols gt Global Protocols gt FTP gt Global High Throughput Normal High Throughput Specifies the Type of Service value that FTP inserts in IP datagrams on a data transfer connection Choose the option that determines how the Internet transport layer handles datagrams on a data transfer connection 1 3 6 1 4 1 18 3 5 3 10 1 9 TCP Window Size Configuration Manager gt Protocols gt Global Protocols gt FTP gt Global 60000 5000 to 64000 bytes Specifies the size of the windows
37. IP datagrams on a data transfer connection Site Manager Procedure You do this System responds 1 In the Configuration Manager window select Protocols The Protocols menu opens Choose Global Protocols The Global Protocols menu opens 3 Choose FTP 4 Choose Global The FTP menu opens The Edit FTP Global Parameters window opens Set the Data Transfer parameter Click on Help or see the parameter description on page A 7 Click on OK You return to the Configuration Manager window Specifying the TCP Window Size You can determine the size of the window you require on your system for TCP connections by specifying its size in bytes By default the size of TCP windows used for connections is 60 000 bytes Using the BCC To specify a TCP window size navigate to the FTP prompt and enter tcp window size lt integer gt integer is the size in bytes of the TCP window 4 10 308631 14 20 Rev 00 Customizing FTP Services Note When specifying TCP window size do not use a comma in the value For example the following command line sets the window size used for TCP connections to 45 000 bytes ftp tcp window size 45000 ftp Using Site Manager To specify the size of the windows used for TCP connections complete the following tasks Site Manager Procedure You do this 1 In the Configuration Manager window choose Protocols Sy
38. Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Site Manager Parameters Force User Logout Configuration Manager gt Protocols gt Global Protocols gt Telnet Server gt Global Disable Enable Disable Specifies whether the user can press control c to cancel a user autoscript at login when a user autoscript is in effect Set the parameter to Enable to prevent using control c to cancel the user autoscript at login Set the parameter to Disable to allow the user to press control c to cancel the user autoscript at login 1 3 6 1 4 1 18 3 5 3 7 1 23 TI History Depth Configuration Manager gt Protocols gt Global Protocols gt Telnet Server gt Global 20 1 to 40 commands Specifies the maximum number of Technician Interface commands stored in the local command history table The table stores each command you enter at the Technician Interface prompt on a first in first out FIFO basis Set the maximum number of commands that you want the router to store for subsequent recall with the Technician Interface history command 1 3 6 1 4 1 18 3 5 3 7 1 24 308631 14 20 Rev 00 Configuring IP Utilities Telnet Client Global Parameters Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Use the following guidelines to configure the pa
39. NetBIOS name that the application no longer requires 2 20 308631 14 20 Rev 00 Overview of IP Utilities e Use a server s NetBIOS name to determine the server s network address The application issues a name query request to NetBIOS containing the target server s NetBIOS name NetBIOS broadcasts the name query request The server that recognizes the name returns a name query response containing its network address The NetBIOS session service allows an application to conduct a reliable sequenced exchange of messages with another application The messages can be up to 131 071 bytes long The NetBIOS datagram service allows an application to exchange datagrams with a specific application or to broadcast datagrams to a group and receive datagrams from the group Datagrams allow applications to communicate without establishing a session When a NetBIOS application wants to send information that does not require acknowledgment from the destination application the application can transmit a NetBIOS datagram NetBIOS in an IP Environment The NetBIOS name service and datagram service rely on the capability of the underlying network to broadcast name query requests to all NetBIOS applications In a NetBIOS over IP environment it is the responsibility of the IP router to ensure that the broadcast queries reach all appropriate network segments To do this the router 1 Analyzes each NetBIOS packet received on any NetBIOS interface
40. Protocols 2 Choose IP The IP menu opens 3 Choose TFTP The TFTP menu opens 4 Choose Edit TFTP Parameters The Edit TFTP Parameters window opens continued 5 2 308631 14 20 Rev 00 Customizing TFTP Services Site Manager Procedure continued You do this System responds 5 Set the Enable parameter Click on Help or see the parameter description on page A 8 6 Click on OK You return to the Configuration Manager window Specifying the Default Volume for the Router When you configure TFTP on the router you can specify which of the router slots will be used for all TFTP get and put commands By default the slot on which TFTP runs on the BN router is slot 2 and on the BayStack it is slot 1 If you are configuring an AN router you must specify slot 1 Using the BCC To specify the volume slot on which TFTP runs navigate to the TFTP prompt for example tftp and enter default volume lt s ot gt slot is an integer from 1 through 14 1a through 4a or 1b through 4b For example the following command sets the default volume on which TFTP runs to 3 tftp default volume 3 titp 308631 14 20 Rev 00 5 3 Configuring IP Utilities Using Site Manager To specify the appropriate volume number slot on which to run TFTP complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols m
41. Server The Telnet Server menu opens 4 Choose Global The Telnet Server Global Parameters window opens Set the Login Timeout min parameter Click on Help or see the parameter description on page A 11 Click on OK Site Manager saves your changes and exits the window 6 12 308631 14 20 Rev 00 Customizing Telnet Services Changing the Password Timeout By changing the password timeout value you can determine the number of minutes that can elapse before the device disconnects the Telnet session if you do not enter a password at the password prompt By default the device waits one minute before it disconnects the Telnet session if you fail to enter a password at the password prompt Using the BCC To specify the number of minutes that can elapse before the device disconnects the Telnet session navigate to the server specific prompt and enter password timeout lt integer gt integer is a number from 1 to 99 For example the following command causes the device to wait 20 minutes before it disconnects the Telnet session server password timeout 20 server Using Site Manager To specify the number of minutes that can elapse before the device disconnects the Telnet session if you fail to enter a password complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Prot
42. a maximum of three DNS servers for DNS proxy The DNS proxy contacts the DNS servers in a round robin fashion trying to complete a hostname to address resolution request If the first DNS server contacted does not respond within the DNS proxy timeout period then the next configured server is tried This continues until a response is received or until all of the configured servers timeouts have been exceeded For example if your DNS proxy is configured with two DNS servers set the timeout for your DNS client to at least two times the value of the DNS proxy Timeout parameter and the Maximum Retransmissions parameter If you observe an inordinate number of DNS client queries that time out internally you may need to raise the value of the DNS client Timeouts parameter 308631 14 20 Rev 00 9 3 Configuring IP Utilities Using the BCC To modify how the router sends DNS requests navigate to the DNS prompt and enter one or more of the following parameters time out lt integer gt integer is a value from 1 to 60 seconds The default is 5 seconds max retransmissions lt nteger gt integer is a value from 0 to 15 seconds The default is 3 retransmissions max outstanding queries lt integer gt integer is a value from 1 to 100 The default 20 queries domain name lt name gt name is an alphanumeric character string representing the default domain name that the router uses when trying to reach a DNS server use default d
43. and started TFTP using the default parameters as described in Chapter 1 Starting IP Utilities and that you understand the TFTP concepts described in Chapter 2 Overview of IP Utilities After you start TFTP on the router TFTP default values are in effect for all TFTP parameters You customize TFTP by modifying these parameters as described in the following sections Topic Page Disabling and Reenabling TFTP Services 52 Specifying the Default Volume for the Router 5 3 Specifying a Retry Timeout Value 5 4 Specifying a Close Timeout Value 5 5 Specifying the Number of Retransmissions 5 6 Deleting TFTP from the Router 5 7 308631 14 20 Rev 00 5 1 Configuring IP Utilities Disabling and Reenabling TFTP Services After you configure IP and start TFTP on the router TFTP is enabled on the router You can disable and reenable TFTP using the BCC or Site Manager Using the BCC To disable TFTP navigate to the TFTP prompt for example box tftp and enter disable For example tftp disable tftp state state disabled To reenable TFTP navigate to the TFTP prompt and enter enable For example tftp enable tftp state state enabled Using Site Manager To disable or reenable TFTP services complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose
44. c to use and copy the associated user manual solely in support of authorized use of the Software by Licensee This license applies to the Software only and does not extend to Nortel Networks Agent software or other Nortel Networks software products Nortel Networks Agent software or other Nortel Networks software products are licensed for use under the terms of the applicable Nortel Networks NA Inc Software License Agreement that accompanies such software and upon payment by the end user of the applicable license fees for such software 2 Restrictions on use reservation of rights The Software and user manuals are protected under copyright laws Nortel Networks and or its licensors retain all title and ownership in both the Software and user manuals including any revisions made by Nortel Networks or its licensors The copyright notice must be reproduced and included with any copy of any portion of the Software or user manuals Licensee may not modify translate decompile disassemble use for any competitive analysis reverse engineer distribute or create derivative works from the Software or user manuals or any copy in whole or in part Except as expressly provided in this Agreement Licensee may not copy or transfer the Software or user manuals in whole or in part The Software and user manuals embody Nortel Networks and its licensors confidential and proprietary intellectual property Licensee shall not sublicense assign or otherwise disc
45. client 9 3 A 29 IP accounting B 2 NetBIOS static entry 8 14 A 27 TFTP 5 3 A 8 Enable Disable parameter DNS proxy 10 3 A 34 FTP 4 3 A 5 NetBIOS global 8 2 A 21 NetBIOS interface 8 10 A 25 NTP 7 3 A 17 TCP 3 3 A 3 Telnet client 6 23 A 16 Telnet server 6 8 A 9 enabling DNS client 1 14 DNS proxy 1 17 FTP 1 7 IP accounting B 2 NetBIOS over IP 1 13 NTP 1 12 TCP 1 5 Telnet 1 9 Telnet client 1 9 Telnet server 1 9 TFTP 1 8 308631 14 20 Rev 00 F Filter Type parameter NTP 7 15 A 19 Force User Logout parameter Telnet server 6 6 A 15 FTP File Transfer Protocol customizing 4 1 deleting 4 12 disabling 4 2 enabling 1 7 global parameters Site Manager A 5 number of sessions maximum 4 7 overview 2 7 reenabling 4 2 show ftp command D 3 starting 1 7 TCP window size 4 10 H Hash Entry Count parameter NetBIOS 8 7 A 24 Idle Time Out parameter FTP 4 7 A 6 Ignore Truncation Error parameter DNS client 9 8 A 32 Index parameter DNS client 9 10 A 33 IP Internet Protocol and TCP 2 1 configuring 1 2 verifying whether configured 1 5 IP accounting configuring B 1 copying table to checkpoint table B 4 enabling B 2 full table B 3 table size maximum B 3 IP Address parameter DNS proxy interface A 35 DNS server for client 9 10 A 33 IP configuration 1 4 NetBIOS static entry 8 13 A 28 308631 14 20 Rev 00 NTP access 7 14 A 18 NTP peer 7 6 A
46. e Port Number Click on Help or see the parameter descriptions beginning on page A 33 The DNS Server Record window opens 7 Click on OK The DNS Server List window reopens 8 Click on Apply and Done You return to the Configuration Manager window You can delete an entry from the DNS server list using either the BCC or Site Manager Using the BCC To delete an entry from the DNS server list navigate to the prompt for the name server that you want to delete and enter the following command delete For example the following command deletes the first DNS server in the list name server 1 delete dns 9 10 308631 14 20 Rev 00 Customizing the DNS Client Using Site Manager To delete an entry from the DNS server list complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose Global Protocols The Global Protocols menu opens 3 Choose DNS The DNS menu opens 4 Choose DNS Servers The DNS Server List window opens This window lists all configured DNS servers 5 Select the server that you want to delete Site Manager highlights the entry 6 Click on Delete Site Manager removes the entry 7 Click on OK The DNS Server List window reopens 8 Click on Apply and Done You return to the Configuration Manager window Deleting
47. either end of the connection can negotiate options Telnet is used primarily to access the Technician Interface You can execute Technician Interface commands from a remote host inbound Telnet or originate an outgoing Telnet session outbound Telnet to another Nortel Networks router or network device that accepts Telnet You use outbound Telnet to access remote routers when Site Manager or Simple Network Management Protocol SNMP is unavailable 308631 14 20 Rev 00 2 11 Configuring IP Utilities To use Telnet to access the Technician Interface you must assign at least one IP address to the router The number of Telnet connections you can make to the Technician Interface is limited only by the availability of system resources that is system memory Note We recommend that you establish no more than one Telnet session per router Before you can enable Telnet on the router you must first create TCP After you create TCP you can create a Telnet server and Telnet client and modify their default parameters For information about creating TCP and Telnet on the router see Chapter 1 Starting IP Utilities For information about modifying Telnet default parameters see Chapter 6 Customizing Telnet Services Telnet Server When you create a Telnet server the router accepts inbound requests from a Telnet client and establishes a Telnet session to the Technician Interface A PC with a network configuration can run a T
48. entries does not increase the number of names that a router can cache With larger networks increasing the size of the hash tables may however reduce internal cache lookup time thereby improving overall performance 1 3 6 1 4 1 18 3 5 3 11 1 10 Rebroadcast Packet TTL Configuration Manager gt Protocols gt IP gt NetBIOS gt Global 5 1 to 255 seconds Specifies the time to live value in seconds to use in rebroadcast packets Use this parameter to restrict the number of routers a rebroadcast packet can traverse To prevent NetBIOS broadcast packets from traversing the network indefinitely set the parameter to a minimal value 1 3 6 1 4 1 18 3 5 3 11 1 13 A 24 308631 14 20 Rev 00 Parameter Path Default Options Function Instructions MIB Object ID Site Manager Parameters Rebroadcast Record Route Configuration Manager gt Protocols gt IP gt NetBIOS gt Global Disable Enable Disable Enables and disables the Insertion of Record Route option in rebroadcast packets If all IP entities support this option select Enable to allow the NetBIOS entity in the router to determine whether it has received this packet before on this interface If so the router drops it This option prevents rebroadcast packets from looping forever 1 3 6 1 4 1 18 3 5 3 11 1 14 NetBIOS IP Interface Table Parameters Parameter Path Default Options Function Instructions MIB Object ID Use the f
49. follows Topic Page Changing the Name of the Manager s Login Script File 6 3 Changing the Name of the User s Login Script File 6 4 Enabling and Disabling User Logout 6 5 Changing the Name of the Manager s Login Script File By default the name of the manager s script file is automgr bat You can specify a new name for the manager s login script by supplying an 8 character file name If you do not want to change the name of the manager s login script accept the default name Using the BCC To specify the name of the Manager s Login script navigate to the server specific prompt and enter manager script lt string gt string is the name of the manager s login script file For example the following command causes the device to assign the name managerl1 bat to the manager s login script server manager script manager1 bat server 308631 14 20 Rev 00 6 3 Configuring IP Utilities Using Site Manager To specify a new manager s login script file complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose Global Protocols The Global Protocols menu opens 3 Choose Telnet Server The Telnet Server menu opens 4 Choose Global The Telnet Configuration window opens 5 Set the Manager s Login Script parameter Click on Help or see t
50. number of commands that the router stores in the history table complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens Choose Global Protocols 3 Choose Telnet Server The Global Protocols menu opens The Telnet Server menu opens 4 Choose Global The Telnet Server Global Parameters window opens Set the TI History Depth parameter Click on Help or see the parameter description on page A 15 Click on OK Site Manager saves your changes and exits the window 6 20 308631 14 20 Rev 00 Customizing Telnet Services Deleting Telnet Server from the Router You can delete Telnet server from the router using either the BCC or Site Manager Using the BCC To delete Telnet server from the router navigate to the server prompt and enter delete For example server delete telnet Using Site Manager To delete Telnet server from the router complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose Global Protocols The IP menu opens 3 Choose Telnet Server The Telnet Server menu opens 4 Choose Delete Telnet Server A message window prompts Do you REALLY want to delete Telnet Server 5 Click on OK Site
51. on Help or see the parameter description on page A 31 Click on OK You return to the Configuration Manager window 9 6 308631 14 20 Rev 00 Customizing the DNS Client Modifying How the DNS Client Handles Server Responses You can specify whether the router accepts the DNS server s response when it contains a truncation bit or whether the router accepts data only from the authorized DNS server Using the BCC To modify how the DNS client handles server responses navigate to the DNS prompt and enter ignore truncation lt state gt state is enabled or disabled authoritative only lt state gt state is enabled or disabled For example the following commands tell the router not to accept DNS server responses that contain the truncation bit in the DNS header and to accept data only from an authorized server dns ignore truncation disabled dns authoritative only enabled Using Site Manager To modify how the DNS client handles server responses complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose Global Protocols The Global Protocols menu opens 3 Choose DNS The DNS menu opens 4 Choose Global The Edit DNS Global Parameters window opens 308631 14 20 Rev 00 9 7 Configuring IP Utilities Site Manager Procedure continued You d
52. see Verifying that IP Is Configured on a Router Interface on page 1 5 If IP is not yet configured see Configuring IP for Global Protocols on page 1 2 for instructions The remote time servers that you want to configure on the network are reachable via IP To do this you must ping the IP address of the time server that you want to configure If the time server is not on the local network you must configure the appropriate IP routing protocol such as RIP or OSPF For information about configuring routing protocols see Configuring IP ARP RARP RIP and OSPF Services To start NTP services on the router with default settings begin in configuration mode at the box or stack prompt 1 Configure NTP box ntp ntp Display NTP default settings ntp info state enabled 308631 14 20 Rev 00 Starting IP Utilities Using Site Manager To start NTP services complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose Global Protocols The Global Protocols menu opens 3 Choose NTP The NTP menu opens 4 Choose Create NTP Site Manager enables NTP on the router Starting NetBIOS over IP You can start NetBIOS over IP and configure it on a circuit using Site Manager default parameter values If you decide to change some or all of the default values see Chapter
53. servers 5 Select a server from the list The DNS Server List window displays the IP address and DNS port for the selected server 6 Click on Done You return to the Configuration Manager window Adding Entries to the DNS Server List for the DNS Client You can specify up to a maximum of three entries for the DNS server list Using the BCC To add a new entry to the DNS server list navigate to the DNS prompt and enter the following command name server number lt server_number gt address lt address gt server_number is the number 1 through 3 of the DNS server address is the IP address of the DNS server For example the following command adds the first DNS server with an IP address of 1 1 1 1 dns name server number 1 address 1 1 1 1 dns 308631 14 20 Rev 00 9 9 Configuring IP Utilities Using Site Manager Deleting Entries from the DNS Server List To add a new entry to the DNS server list complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose Global Protocols The Global Protocols menu opens 3 Choose DNS The DNS menu opens 4 Choose DNS Servers The DNS Server List window opens This window lists all configured DNS servers 5 Click on Add 6 Set the following parameters e Index e IP Address
54. size 60000 Using Site Manager Before you can start FTP services you must first start TCP see Starting TCP Services on page 1 5 To start FTP services complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose Global Protocols The Global Protocols menu opens continued 308631 14 20 Rev 00 1 7 Configuring IP Utilities Site Manager Procedure continued You do this System responds 3 Choose FTP The FTP menu opens 4 Choose Create FTP Site Manager enables FTP on the router Starting TFTP Services Before you begin verify that IP is configured on a router interface For 3 instructions see Verifying that IP Is Configured on a Router Interface on page 1 5 If IP is not yet configured see Configuring IP for Global Protocols on page 1 2 for instructions During the process of first configuring IP using Site Manager you are prompted as to whether you want to automatically enable TFTP Clicking on Yes starts TFTP services If you do not enable TFTP at this prompt you can manually start TFTP by performing the following procedures You can use the BCC or Site Manager to configure TFTP on the router accepting default values for all parameters Note If the configuration file is already on the router then you must enable TFTP usin
55. the server within the specified time to live If the entry is invalid the name query request will not reach the server In this case the entry quickly ages out By default inactive NetBIOS names expire from the NetBIOS name cache after 300 seconds 308631 14 20 Rev 00 8 5 Configuring IP Utilities To specify any time value for aging out infrequently referenced names from the NetBIOS name cache complete the following tasks using Site Manager Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose IP The IP menu opens 3 Choose NetBIOS The NetBIOS menu opens 4 Choose Global The Edit NetBIOS IP Global Parameters window opens 5 Set the Name Cache Age parameter Click on Help or see the parameter description on page A 23 6 Click on OK Site Manager returns you to the Configuration Manager window Choose an aging value that allows infrequently referenced or obsolete server names to expire from the name cache The smaller the value the less efficient broadcast reduction is but the more quickly the network recovers topology changes Customizing a Cache Search The mechanism that NetBIOS uses to search for a name in the cache is based on a fast string hash search mechanism developed for AppleTalk Zone Name processing This mechanism uses a hash table that NetBIOS builds and maintains on the
56. to determine whether the packet is a broadcast packet 2 Rebroadcasts each broadcast packet out all appropriate interfaces except the one on which it was received readdressing the packet if required If alternate paths exist between different network segments broadcasting loops can occur To prevent such loops the router 1 Stamps the data portion of the IP packet with the IP address of the router from which the packet was rebroadcast 2 Parses the IP addresses included in the data portion of the IP packet to determine if the packet has already been rebroadcast by that router In Figure 2 8 for example client C on the network connected to router B wishes to communicate with server S which is located on the network connected to router A 308631 14 20 Rev 00 2 21 Configuring IP Utilities The following steps occur 1 The client issues a name query request to NetBIOS on the host specifying the server application by its NetBIOS name The IP service on the host broadcasts the name query request 2 Router B receives the name query request determines that it is a broadcast message and rebroadcasts it out each of its NetBIOS interfaces except for the one on which it arrived 3 Router A receives the broadcast request and rebroadcasts it to its local network 4 The server on router A receives the IP broadcast request and recognizes its own name Router A gt Rout
57. used for TCP connections Determine the window size that you require and specify the size in bytes 1 3 6 1 4 1 18 3 5 3 10 1 10 308631 14 20 Rev 00 A 7 Configuring IP Utilities TFTP Parameters Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Use the following guidelines to configure the parameters in the Edit TFTP Parameters window Enable Configuration Manager gt Protocols gt IP gt TFTP gt Edit TFTP Parameters Enable Enable Disable Specifies whether TFTP is enabled for the IP router Select Enable to enable TFTP for the IP router Because TFTP allows write access to the router s file system you should not enable TFTP in network environments in which you are concerned with security Select Disable to disable TFTP for the IP router 1 3 6 1 4 1 18 3 5 3 6 1 Default Volume Configuration Manager gt Protocols gt IP gt TFTP gt Edit TFTP Parameters 2 112131415161718lol1oli1 112113114 Specifies which of the router s slots will be used by default for all TFTP GETs and PUTs Specify the appropriate slot number If you are configuring an AN router you must specify slot 1 1 3 6 1 4 1 18 3 5 3 6 2 Retry Time Out Configuration Manager gt Protocols gt IP gt TFTP gt Edit TFTP Paramete
58. uses when trying to reach a DNS server You can use this domain name when issuing a ping command to verify the connection to a DNS server This parameter is valid only for use with the Technician Interface For example if you want to check the connection from router A to remote Nortel Networks router B you can set this parameter to nortelnetworks com When you enter the command ping router router A the DNS client adds nortelnetworks com to the command making the actual command ping router nortelnetworks com The DNS server translates the name to an IP address Enter the default domain name 1 3 6 1 4 1 18 3 5 3 19 1 7 Recursion Configuration Manager gt Protocols gt Global Protocols gt DNS gt Create DNS Client Enable Enable Disable Sets the recursion bit in the DNS packet header so that if the first server that the router contacts does not have the required information that server finds another server that can respond to the request Nortel Networks recommends that you accept the default Enable to implement recursion for resolving requests to a DNS server 1 3 6 1 4 1 18 3 5 3 19 1 8 308631 14 20 Rev 00 A 31 Configuring IP Utilities Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Ignore Truncatio
59. 32 5 7 mode server peer preference disabled src ip address 0 0 0 0 Using Site Manager To specify the mode for the remote time server complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens Choose Global Protocols The Global Protocols menu opens Choose NTP The NTP menu opens Choose Peers The NTP Peers Configuration List window opens Click on the IP address of the time server in the NTP Peer list Set the Config Peer Mode parameter Click on Help or see the parameter descriptions on page A 19 Click on Apply Site Manager sets the mode for the remote time server to Server Nortel Networks supports only the Server option Click on Done You return to the Configuration Manager window 308631 14 20 Rev 00 Configuring IP Utilities Setting Local Host Mode The Local Host Mode parameter indicates the mode of operation of the local NTP client By default the local host mode is set to client because only unicast client mode is supported To specify the local mode in which you want to configure the local NTP client complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose Global Protocols The Global P
60. 4 20 Rev 00 Configuring IP Utilities Using Site Manager To delete TFTP from the router complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose IP The IP menu opens 3 Choose TFTP The TFTP menu opens 4 Choose Delete Site Manager deletes TFTP 5 8 308631 14 20 Rev 00 Chapter 6 Customizing Telnet Services This chapter describes how to customize Telnet services on the router It assumes that you have configured IP on an interface and started Telnet using the default parameters as described in Chapter 1 Starting IP Utilities and that you understand the Telnet concepts described in Chapter 2 Overview of IP Utilities gt After you start Telnet services on the router default values are in effect for all Telnet configuration parameters You customize Telnet by modifying these parameters as described in the following sections Topic Page Configuring Telnet Using the BCC or Site Manager 6 2 Customizing the Telnet Configuration 6 3 Customizing Telnet Server on the Router 6 7 Customizing a Telnet Client 6 22 308631 14 20 Rev 00 6 1 Configuring IP Utilities Configuring Telnet Using the BCC or Site Manager Table 6 1 lists the Telnet configuration tasks described in this chapter and indicates whether you can use t
61. 6 3 Changing the Name of the Manager s Login Script File Ea N 6 3 Changing the Name of the Users Login Script File ssseeeseeeseeesreesereerersrrrssrseren 6 4 Enabling and Disabling User LOgo sscsccrcsdsiccsrmiturcetensteessieraviocttan neni 6 5 Customizing Telnet Server on the Router seeen EA EAE EE EEA 6 7 Disabling and Reenabling a Telnet Server on the IP Router ceeceseeeeteeeeees 6 7 Specifying the Maximum Number of Lines on the Console s es 6 9 Pausing Telnet Console Outil mrsiiscsrioiiiinriii ai a a O Changing the Telnet Login Prompt ssssssssssessssssesessrreserserntesrnterrnstnnssrnnertnneennsnnnne 6 11 Changing the Login Timeout N eer eee PET eaa aai S NE 6 12 Changing the Password TIMGQUE sccisunicctciennminentiacumiinnnnnel nicacied 6 13 Changing the Command TOY gece coshot cca sadestecesaiantcesaiceeiaeseadasceibis eat eadisceniaalaae 6 14 PB ce ale faved Login RENES eee eee eee ee er Unter rere eee rrer etry roe ey tere retreat re 8 15 308631 14 20 Rev 00 vii Using Telnet Server Diagnosis scscctestescctesssiascsieriiasiceas eastern ates 6 16 Enabling Diagnostic Reporing isosirisisannia aaaeaii 6 16 Enabling Diagnostic Exercise vinin ET PE E iced oumthadieadseacds 6 17 Enabling Diagnostic Network Data cccccceceeeeeeeeeeeeeeeeeeeeeeteeeeeeeeeeeeeeeees 6 18 Enabling Diagnostig PTY Dala ccicxcsraveastpiasacersstedssaateisdatemsniedtsecciaced vies nominees 6 18
62. 8 starting 1 9 See also Telnet client Telnet server Telnet client deleting 6 26 disabling 6 22 global parameters Site Manager A 16 reenabling 6 22 starting 1 9 Telnet server deleting 6 21 disabling 6 7 global parameters Site Manager A 9 reenabling 6 7 starting 1 9 text conventions xviii TFTP Trivial File Transfer Protocol customizing 5 1 deleting 5 7 disabling 5 2 enabling 1 8 overview 2 10 parameters Site Manager A 8 reenabling 5 2 show tftp command D 9 starting 1 8 Threshold parameter IP accounting B 3 TI History Depth parameter Telnet server 6 20 A 15 TI Lines per Screen parameter Telnet server 6 9 A 10 Index 5 TI More parameter Telnet server 6 10 A 10 TI Prompt parameter Telnet server 6 11 A 11 Time Out parameter DNS client 9 5 A 29 Timeout parameter DNS proxy 10 6 A 37 Transmission Control Protocol See TCP Transmission Control Protocol Transmit Bcast Addr parameter IP configuration 1 4 Trap Percent parameter IP accounting B 4 Trivial File Transfer Protocol See TFTP Trivial File Transfer Protocol Trunc Max Allowed parameter DNS proxy 10 6 A 39 Type of Service parameter FTP 4 9 A 6 U UnNumbered Assoc Address parameter IP configuration 1 4 Use Auth Answer Only parameter DNS client 9 8 A 32 Use Default Domain Name parameter DNS client 9 5 A 32 Jser s Login Script parameter Telnet server 6 5 A 14
63. BayRS Version 14 20 Part No 308631 14 20 Rev 00 September 2000 600 Technology Park Drive Billerica MA 01821 4130 Configuring IP Utilities NORTEL NETWORKS Copyright 2000 Nortel Networks All rights reserved September 2000 The information in this document is subject to change without notice The statements configurations technical data and recommendations in this document are believed to be accurate and reliable but are presented without express or implied warranty Users must take full responsibility for their applications of any products specified in this document The information in this document is proprietary to Nortel Networks NA Inc The software described in this document is furnished under a license agreement and may only be used in accordance with the terms of that license The software license agreement is included in this document Trademarks NORTEL NETWORKS is a trademark of Nortel Networks Bay Networks AN BCN BN and FRE are registered trademarks and ASN BayRS BayStack BCC and System 5000 are trademarks of Nortel Networks All other trademarks and registered trademarks are the property of their respective owners Restricted Rights Legend Use duplication or disclosure by the United States Government is subject to restrictions as set forth in subparagraph c 1 ii of the Rights in Technical Data and Computer Software clause at DFARS 252 227 7013 Notwithstanding any other license agreement
64. Click on OK Site Manager saves your changes and exits the window Enabling and Disabling User Logout By default the user autoscript is in effect for your Telnet session when you log in To cancel the user autoscript and access the Technician Interface you can press Control C To prevent users from canceling the user autoscript at login set this parameter to Enable Using the BCC To prevent users from canceling the user autoscript at login navigate to the server specific prompt and enter force logout enabled For example this command prevents users from canceling the user autoscript at login server force logout enabled server To allow users to cancel the user autoscript at login navigate to the server specific prompt and enter force logout disabled 308631 14 20 Rev 00 6 5 Configuring IP Utilities For example this command allows users to cancel the user autoscript at login server force logout disabled server Using Site Manager To cancel the user autoscript at login or to prevent users from canceling the user autoscript at login complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose Global Protocols The Global Protocols menu opens 3 Choose Telnet Server The Telnet Server menu opens 4 Choose Global The Telnet Configurat
65. DNS Client Services from the Router You can delete DNS client services from the router using either the BCC or Site Manager Using the BCC To delete DNS client services from the router navigate to the DNS prompt and enter the following command delete For example the following command deletes DNS client services from the router dns delete box 308631 14 20 Rev 00 9 11 Configuring IP Utilities Using Site Manager To delete DNS client services from the router complete the following tasks Site Manager Procedure You do this System responds 1 Inthe Configuration Manager window The Protocols menu opens choose Protocols 2 Choose Global Protocols The Global Protocols menu opens 3 Choose DNS The DNS menu opens 4 Choose Delete DNS Client A message box prompts Do you REALLY want to delete DNS 5 Click on OK You return to the Configuration Manager window 9 12 308631 14 20 Rev 00 Chapter 10 Customizing the DNS Proxy This chapter describes how to customize DNS proxy services on a router interface It assumes that you have e A machine with DNS server installed e Configured IP on a router interface for instructions see Configuring IP for Global Protocols on page 1 2 e Started BayRS DNS proxy and specified at least one DNS server for the router for instructions see Starting the DNS Proxy and Specifying Its First DNS Server on page 1 17
66. E 7 10 Deleting Remote Time Servers from a Router cccceccscecsseessseeeseseeeesseeeesteeeees 7 12 Contouring NTF Access Omid arenero ena E 7 13 Specifying the IP Address of the Time Server ccccccsceceeeeeeeeeeeeeeeeeeeeeeesenaeees 7 13 Specifying a Filter Type and IP Subnet Mask 0 cccccceeeeeeeeteeeeeeeeeeeeeeseneeeneeeees 7 14 Deleting NTP from The ROUET sissccc ccs scctecsasticcerisasiccceerativieetnasscnemrtineans NT 7 15 viii 308631 14 20 Rev 00 Chapter 8 Customizing NetBIOS over IP Disabling and Reenabling NetBIOS on the Router Seeniacees MET EE 8 2 Configuring a NetBIOS Cacha enirus aE EAE AATE 8 2 Enabling Name Caching on the Router cccecceseseeceeeeeeeeeeeeeeeeteeaeeeeaes apinata 8 3 Specifying Whether a MIB Instance Is Created for Each Cached ane E ac 8 4 Specifying the Size of the Name Cache ccccsccccecessseeeeeeseneeeeeeseneeeeessseeeeeseeeas 8 4 Aging a Cache Entry kikari eeeiaaags saraca E T aeneiags rc OO CUSTOMIZING a Cache SeSIOl ind aaneiasenndi aie 8 6 Specifying a TTL Value for a Rebroadcast Packet ie es 8 8 Enabling the Rebroadcast of Record ROULES s cccicsccicscccnsasccnscesiescocscenenctuasderertacens san Bg Customizing NetBIOS on an IP Interface eecccecceeeeceeeeeeeeeeeeeeeeeeeeeeeaeeeaeseneeseeeeaes 8 9 Disabling and Reenabling NetBIOS on an Interface E 8 9 Disabling and Reenabling Name Caching on the Interface
67. EES THAT THIS AGREEMENT IS THE ENTIRE AND EXCLUSIVE AGREEMENT BETWEEN NORTEL NETWORKS AND LICENSEE WHICH SUPERSEDES ALL PRIOR ORAL AND WRITTEN AGREEMENTS AND COMMUNICATIONS BETWEEN THE PARTIES PERTAINING TO THE SUBJECT MATTER OF THIS AGREEMENT NO DIFFERENT OR ADDITIONAL TERMS WILL BE ENFORCEABLE AGAINST NORTEL NETWORKS UNLESS NORTEL NETWORKS GIVES ITS EXPRESS WRITTEN CONSENT INCLUDING AN EXPRESS WAIVER OF THE TERMS OF THIS AGREEMENT iv 308631 14 20 Rev 00 Contents Preface Eoo 20 Ul 2 ae anne ener er reer ee eer tere ene nen rein eer rere reer tT reer tr er renee errs xvii Text Conventions geuasanes seniai abe Taniaren eeausans EE Sepai PANEG xviii AOOO cupra nui i eee xix Pare Sopy Technical Manuals cca nis tatcsriuas xe bedaiontipaioase uaa neste lade ee xxi How EAU A cs ass sce cca eaes rs ese cece dads hee ad setae a EAA ENR xxi Chapter 1 Starting IP Utilities Starting Configuration TOOIS sscersssccccsccesaianeeeicieniae cance ET AEE 1 2 Configuring IP Tor Global Prolocols parserna ast aE ea NRN 1 2 Verifying that IP Is Configured on a Router Interface ccececeeeseeeeeeeeeeeeeeetenneeeeeaes 1 5 Starting TOP SeVvibes cate hersctieensieiiarietiean ttusaa addenda Seaain AT A ten 1S Startno 0 gil gas A eae eer er eee NT a mere nne mer enn een revere esr regi ee a arTtereen errr rerer ete 1 7 Starting TFTP Servicos sirssirissirerisissikeniia aiai EEE E AE E E EE T Gees 1 8 Staring Ve IST eS sioan a EEE R 1 9
68. IP accounting Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Chose IP The IP menu opens 3 Choose Global The Edit IP Global Parameters window opens 4 Set the Enable parameter Click on Help or see the parameter description on page A 40 5 Click on OK You return to the Configuration Manager window 308631 14 20 Rev 00 Configuring IP Accounting on a Frame Relay Interface Specifying the Maximum Size of the IP Accounting Table By default the IP accounting table can contain up to 512 entries per slot You can use Site Manager to specify the maximum number of entries in the IP accounting table Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose IP The IP menu opens 3 Choose Global The Edit IP Global Parameters window opens 4 Set the Threshold parameter Click on Help or see the parameter description on page A 40 5 Click on OK You return to the Configuration Manager window Controlling Notification of a Full IP Accounting Table By default IP accounting sends a log message when the active IP accounting table is 80 percent full You must configure a trap to be sent Use Site Manager to configure a trap exception for entity 6 and even
69. Manager deletes Telnet server 308631 14 20 Rev 00 6 21 Configuring IP Utilities Customizing a Telnet Client After you start a Telnet client on the router for outbound Telnet sessions as described in Chapter 1 default values are in effect for all Telnet client parameters This section describes how to customize your Telnet client on the router as follows Topic Page Disabling and Reenabling a Telnet Client on the IP Router 6 22 Enabling and Disabling Verbose Debug Logging 6 23 Changing the Remote Port 6 24 Changing the Command Prompt 6 25 Deleting Telnet Client from the Router 6 26 Disabling and Reenabling a Telnet Client on the IP Router You can disable or reenable a Telnet client on the IP router By default the Telnet client is enabled on the IP router allowing you to establish Telnet sessions to the target router Using the BCC To disable a Telnet client navigate to the client specific prompt for example box telnet client and enter disable For example client disable client state state disabled To reenable a Telnet client on the IP router navigate to the client specific prompt and enter enable For example client enable 6 22 308631 14 20 Rev 00 client state state enabled Customizing Telnet Services Using Site Manager To disable or reenable a Telnet client on an IP router complete the following tasks Site Manager Pro
70. NIX DNS server software is available from third party suppliers The router that has DNS proxy configured must have an interface that connects to the computer running DNS server You can specify up to three DNS servers for a router interface configured with DNS proxy To configure DNS proxy on a router that will be used for bidirectional network address translation NAT services you must configure DNS proxy on at least one NAT router interface for each domain used in address translation Before you begin verify that IP is configured on a router interface For instructions see Verifying that IP Is Configured on a Router Interface on page 1 5 If IP is not yet configured see Configuring IP for Global Protocols on page 1 2 for instructions 308631 14 20 Rev 00 1 17 Configuring IP Utilities Using the BCC To configure DNS proxy on a router interface you must 1 Start DNS proxy 2 Specify a DNS server for the DNS proxy Step 1 Start DNS Proxy To start DNS proxy on a router interface with default settings navigate to an IP interface for example box ethernet 2 1 ip 192 1 34 67 8 and enter dns proxy In the following example DNS proxy has been configured on IP interface 192 1 34 67 and the info command displays the default DNS proxy settings ip 192 1 34 67 255 0 0 0 dns proxy dns proxy 192 1 34 67 info answer truncation disabled domain name fwd port 53 fwd serverl address 0 0 0 0 fwd server2 ad
71. NS Server 1 14 Starting the DNS Proxy and Specifying Its First DNS Server 1 17 For background information about these protocols see Chapter 2 Overview of IP Utilities 308631 14 20 Rev 00 1 1 Configuring IP Utilities Starting Configuration Tools Before configuring TCP FTP TFTP Telnet NTP NetBIOS over IP or DNS services refer to the following user guides for instructions on how to start and use the Nortel Networks configuration tool of your choice Configuration Tool User Guide Bay Command Console BCC Using the Bay Command Console BCC Site Manager Configuring and Managing Routers with Site Manager These guides also describe generically how to create and modify a device configuration Configuring IP for Global Protocols Before you configure any IP utility using the BCC or Site Manager you must first start IP on the router When you configure IP on a router interface IP is globally enabled on the router by default You can configure IP using either the BCC or Site Manager For information about how to customize IP by modifying IP global and interface parameters see Configuring IP ARP RARP RIP and OSPF Services Using the BCC To start IP on the router 1 Configure a physical interface on an available slot connector 2 Configure an IP interface on the physical interface Step 1 Configure a Physical Interface To configure a physical interface on a slot and con
72. NS client on the router you must specify at a minimum one DNS server This DNS server must be configured on a platform that has an interface to the router configured with DNS client To specify a DNS server navigate to the dns prompt for example box dns and enter name server lt number gt address lt ip_address gt number is 1 2 or 3 ip_address is the IP address of the DNS server For example setting the name server 1 parameter to IP address 192 32 75 9 specifies this as the location of the first DNS server The info command then displays the default settings for this DNS server dns name server 1 address 192 32 75 9 name server 1 info address 192 32 75 9 number 1 port 53 308631 14 20 Rev 00 1 15 Configuring IP Utilities Using Site Manager To configure DNS client on the router you must 1 Start the DNS client 2 Specify a DNS server for the DNS client Step 1 Start the DNS Client To create and enable the DNS client complete the following tasks Site Manager Procedure You do this System responds 1 Inthe Configuration Manager window choose Protocols The Protocols menu opens 2 Choose Global Protocols The Global Protocols menu opens 3 Choose DNS The DNS menu opens 4 Choose Create DNS Client The DNS Configuration window opens 5 Click on OK You return to the Configuration Manager window Step 2 Specify a DNS Server After you create
73. NetBIOS uses the IP broadcast address configured for this interface when rebroadcasting NetBIOS packets out this interface To supply a rebroadcast address that overrides this broadcast address complete the following tasks using Site Manager Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose IP The IP menu opens 3 Choose NetBIOS The NetBIOS menu opens 4 Choose Interfaces The NetBIOS IP Interface Table window opens Click on the IP interface that you want to modify Set the NetBIOS Rebroadcast IP Address parameter Click on Help or see the parameter description on page A 27 Click on Apply then click on Done You return to the Configuration Manager window Configuring a Static NetBIOS Name and Address You can add static NetBIOS names to the router These entries are independent of the name entries learned dynamically in the name cache Creating the NetBIOS Static Entry To create a NetBIOS static entry you must specify The name of the NetBIOS station from 1 to 16 characters The IP address of the NetBIOS station 8 12 308631 14 20 Rev 00 e The NetBIOS scope identifier Customizing NetBIOS over IP The NetBIOS scope is the area of the network across which the name is known The scope ID is a character string that meets the requirements outlin
74. OS interface to determine whether the name of the requested resource typically a server is in the cache If so the router replaces the broadcast address in the request with the unicast IP address of the server The router then forwards the name query request to the server 308631 14 20 Rev 00 Enabling Name Caching on the Router Customizing NetBIOS over IP The NetBIOS Name Caching parameter enables the router to cache the name associated with each NetBIOS server that is active on the network By default NetBIOS name caching is disabled The 15 character NetBIOS name caching parameter enables the router to treat a NetBIOS name as either a 15 or a 16 character entity By default NetBIOS treats a name as a 16 character entity You can use Site Manager to enable the feature if you want NetBIOS to treat a name as a 15 character entity To enable name caching on the router complete the following tasks using Site Manager Site Manager Procedure You do this 1 In the Configuration Manager window choose Protocols System responds The Protocols menu opens 2 Choose IP The IP menu opens 3 Choose NetBIOS The NetBIOS menu opens 4 Choose Global The Edit NetBIOS IP Global Parameters window opens 5 Set the following parameters e NetBIOS Name Caching e 15 Character NetBIOS Name Caching Click on Help or see the parameter descriptions beginning on page A 22 6 Click on OK
75. STOU Specifies the same operation as the Store command and in addition causes the server to create the resulting file in the current directory under a name unique to that directory Delete DELE Causes the server to delete the specified file on the server List LIST Causes the server to send to the client a detailed list of files Name List NLST Causes the server to send to the client a list of file names Status STAT Causes the server to send to the client the control connection status If the server receives the command during file transfer the server sends the client the status of the transfer Help HELP Provides helpful information No Operation NOOP Specifies no action Causes the server to send an OK reply continued 308631 14 20 Rev 00 2 9 Configuring IP Utilities Table 2 3 FTP Commands Supported continued Command Code Description Change Working CWD Causes the server to change the volume Directory Print Working PWD Causes the server to print its current working directory Directory Implementation specific FTP Commands Compact COMP Causes the server to compact the flash card Use this command after the delete command or when the amount of contiguous space is low You can determine the amount of contiguous space on a router by using the dir command TFTP Overview The Trivial File Transfer Protocol TFTP is a TCP IP stan
76. Telnet Client Global Parameters window opens Set the Remote Port parameter Click on Help or see the parameter description on page A 17 Click on OK You return to the Configuration Manager window Changing the Command Prompt You can change the default Telnet client command prompt by specifying any text string less than 40 characters long Using the BCC To change the default Telnet client command prompt navigate to the client specific prompt and enter prompt lt string gt string is any text string less than 40 characters For example the following command changes the default command prompt to system client prompt system1 client 308631 14 20 Rev 00 6 25 Configuring IP Utilities Using Site Manager To change the default Telnet client command prompt complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose Global Protocols The Global Protocols menu opens 3 Choose Telnet Client The Telnet Client menu opens 4 Choose Global The Edit Telnet Client Global Parameters window opens Set the Prompt parameter Click on Help or see the parameter description on page A 17 Click on OK You return to the Configuration Manager window Deleting Telnet Client from the Router You can delete Telnet client servic
77. Then to configure Telnet on the router you must 1 Start a Telnet server 2 Start a Telnet client Step 1 Start a Telnet Server To start a Telnet server complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose Global Protocols The Global Protocols menu opens 3 Choose Telnet Server The Telnet Server menu opens 4 Choose Create Telnet Server The Telnet Configuration window opens allowing you to customize Telnet server global parameters Step 2 Start a Telnet Client To start a Telnet client complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose Global Protocols The Global Protocols menu opens 3 Choose Telnet Client The Telnet Client menu opens 4 Choose Create Telnet Client Site Manager enables Telnet client 308631 14 20 Rev 00 1 11 Configuring IP Utilities Starting NTP Services You can use the BCC or Site Manager to configure NTP on the router accepting default values for all parameters If you decide to change some or all of the default values see Chapter 7 Customizing NTP Services Before you begin verify that Using the BCC IP is configured on a router interface For instructions
78. Truncation parameter DNS proxy 10 6 A 38 C Cache Size parameter DNS proxy 10 6 A 39 Close Time Out parameter TFTP 5 6 A 9 Command Timeout parameter Telnet server 6 15 A 12 Config Peer Mode parameter NTP 7 7 A 19 Control Connection parameter FTP 4 9 A 7 conventions text xviii Create MIB Inst for Cached Name parameter NetBIOS 8 4 A 22 customer support xxi D Data Transfer parameter FTP 4 10 A 7 Default Volume parameter FTP 4 4 A 5 Default Volume parameter TFTP 5 4 A 8 deleting DNS client 9 11 DNS proxy 10 8 FTP 4 12 NetBIOS over IP 8 16 308631 14 20 Rev 00 Index NTP 7 15 TCP 3 7 Telnet client 6 26 Telnet server 6 21 TFTP 5 7 Diagnostic Exercise parameter Telnet server 6 17 A 13 Diagnostic Network Data parameter Telnet server 6 18 A 13 Diagnostic Options parameter Telnet server 6 19 A 14 Diagnostic PTY Data parameter Telnet server 6 19 A 13 Diagnostic Report parameter Telnet server 6 17 A 12 disabling DNS client 9 2 DNS proxy 10 2 FTP 4 2 NetBIOS over IP interface 8 9 NetBIOS over IP on router 8 2 NTP 7 2 TCP 3 2 Telnet client 6 22 Telnet server 6 7 TFTP 5 2 DNS Domain Name Service customizing DNS client 9 1 customizing DNS proxy 10 1 show server command D 2 show stats command D 3 starting client services 1 14 See also DNS client DNS proxy DNS server Index 1 DNS client customizing 9 1 deleting
79. WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE In addition the program and information contained herein are licensed only pursuant to a license agreement that contains restrictions on use and disclosure that may incorporate by reference certain limitations and notices imposed by third parties ii 308631 14 20 Rev 00 Nortel Networks NA Inc Software License Agreement NOTICE Please carefully read this license agreement before copying or using the accompanying software or installing the hardware unit with pre enabled software each of which is referred to as Software in this Agreement BY COPYING OR USING THE SOFTWARE YOU ACCEPT ALL OF THE TERMS AND CONDITIONS OF THIS LICENSE AGREEMENT THE TERMS EXPRESSED IN THIS AGREEMENT ARE THE ONLY TERMS UNDER WHICH NORTEL NETWORKS WILL PERMIT YOU TO USE THE SOFTWARE If you do not accept these terms and conditions return the product unused and in the original shipping container within 30 days of purchase to obtain a credit for the full purchase price 1 License grant Nortel Networks NA Inc Nortel Networks grants the end user of the Software Licensee a personal nonexclusive nontransferable license a to use the Software either on a single computer or if applicable on a single authorized device identified by host ID for which it was originally acquired b to copy the Software solely for backup purposes in support of authorized use of the Software and
80. able NTP on the router complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens Choose Global Protocols The Global Protocols menu opens 3 Choose NTP The NTP menu opens 4 Choose Global The Edit NTP Global Parameters window opens Set the Enable Disable parameter Click on Help or see the parameter description on page A 3 Click on OK You return to the Configuration Manager window Setting the NTP Operation Mode You must specify the mode of operation in which you want to configure NTP to run on a router NTP provides three operation modes unicast client broadcast client and multicast client modes The current implementation of NTP supports only client mode You select unicast client mode when you want to configure remote time servers peers You select broadcast client mode and multicast client mode when you want to configure access control filters to restrict certain remote time servers from sending NTP packets to a local NTP client By default NTP runs in unicast client mode 308631 14 20 Rev 00 Configuring IP Utilities To specify the mode in which you want NTP to run on the router complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protoc
81. able end to end communications IP takes the packet from TCP and passes it along any needed gateways for delivery to the remote TCP layer through the remote IP layer 308631 14 20 Rev 00 2 1 Configuring IP Utilities The Nortel Networks implementation of TCP generally ensures good terminal server performance on slow speed as well as high speed LAN links TCP services are required to support upper layer protocols such as Telnet and FTP which are part of the TCP IP suite TCP does not require reliability of the communication protocols below itself Therefore TCP functions with lower level protocols that are simple potentially unreliable datagram services TCP uses IP for a lower level protocol How TCP Works TCP is connection oriented Therefore before transferring data you must first establish a logical transport layer connection with a peer user To establish this connection TCP uses what is sometimes called a three way handshake in which the initiating TCP sends a Protocol Data Unit PDU with a synchronize SYN bit set to 1 in its header The responding TCP then sends back a PDU with both the SYN bit and the Acknowledged ACK bit set and possibly some user data Time and if necessary retransmission are used to recover PDUs lost in this process allowing each side to indicate its starting sequence number Because of the possibility of lost or delayed PDUs this three way exchange ensures that connections are establis
82. ables caching of the NetBIOS name you have selected Set the parameter to Enable to activate caching of the name you selected Set the parameter to Disable to deactivate caching of the name you selected 1 3 6 1 4 1 18 3 5 3 11 4 1 2 308631 14 20 Rev 00 A 27 Configuring IP Utilities Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID NetBIOS Station Name Configuration Manager gt Protocols gt IP gt NetBIOS gt Static Name gt Add None A name string of up to 16 characters Specifies the name of a NetBIOS station Enter the NetBIOS name you want to add The name must not exceed 16 characters The system pads names shorter than 16 characters with ASCII space characters To enter non ASCII values in the name use the form xbb where bb can be any two hexadecimal digits 1 3 6 1 4 1 18 3 5 3 11 4 1 4 NetBIOS Scope ID Configuration Manager gt Protocols gt IP gt NetBIOS gt Static Name None A NetBIOS scope identifier Identifies the area of the network across which the NetBIOS name is known Enter a name string that meets the requirements of the Domain Name System as described in RFC 833 1 3 6 1 4 1 18 3 5 3 11 4 1 5 IP Address Configuration Manager gt Protocols gt IP gt NetBIOS gt Static Name gt Ad
83. about their clocks such as stratum precision and time reference Figure 2 6 The NTP client reviews the list of responses from all the available servers and chooses one as the best available time source from which to synchronize its internal clock 2 18 308631 14 20 Rev 00 Overview of IP Utilities o TTL HTT A NTP clients o NTP time TTT servers HTT B Server A Server B 0 Peer list HTT TELL C TCPO006A Figure 2 6 NTP Time Servers Operating in Unicast Client Mode Broadcast and Multicast Client Mode In broadcast client and multicast client modes the local NTP client will accept NTP packets from every remote time server provided that the IP destination address of the NTP packet matches the IP broadcast address of the local NTP client After the NTP client receives NTP packets it applies rules to select the remote time server with the greatest accuracy In broadcast client and multicast client modes you can restrict specific time servers from sending NTP packets to an NTP client by configuring access control filters You cannot however configure peers in either broadcast client or multicast client mode Nortel Netw
84. ace 8 10 size of name cache 8 4 overview 2 20 rebroadcast address for 8 12 rebroadcast packet TTL value for 8 8 starting 1 13 static name caching 8 14 configuring 8 12 static parameters Site Manager A 27 traffic filters adding 8 14 NetBIOS Rebroadcast IP Address parameter NetBIOS 8 12 A 27 NetBIOS Scope ID parameter NetBIOS 8 13 A 28 NetBIOS Station Name parameter NetBIOS 8 13 A 28 Network Basic Input Output System NetBIOS over IP See NetBIOS over IP Network Time Protocol See NTP Network Time Protocol NTP Network Time Protocol customizing 7 1 deleting 7 15 disabling 7 2 enabling 1 12 overview 2 15 parameters Site Manager A 17 reenabling 7 2 Index 4 show access command D 5 show ntp access command D 4 show ntp base command D 5 show ntp stats command D 6 show peers command D 5 starting 1 12 P Password Timeout parameter Telnet server 6 14 A 11 Peer Preference parameter NTP 7 11 A 21 Port Number parameter DNS client 9 10 A 34 ports TCP 2 4 product support xxi Prompt parameter Telnet client 6 26 A 17 Proxy Listen Port Number parameter DNS proxy 10 6 A 35 Proxy Mode parameter DNS proxy 10 6 publications hard copy xxi R Rebroadcast Packet TTL parameter NetBIOS 8 8 A 24 Rebroadcast Record Route parameter NetBIOS 8 9 A 25 Recursion parameter DNS client 9 6 A 31 reenabling DNS client 9 2 DNS pro
85. address and source subnet mask Specify Restrict or Prefer When you specify Prefer NTP disables filtering on a specific remote time server s IP address or a range of remote time servers IP addresses 1 3 6 1 4 1 18 3 5 3 17 2 1 2 IP Mask Configuration Manager gt Protocols gt Global Protocols gt NTP gt Access None 0 0 0 0 or any valid IP address Specifies an IP subnet mask address to filter NTP timestamps based on a source subnet NTP drops all packets sent from a specific remote time server on a specified subnet Specify the IP subnet mask address of the filter 1 3 6 1 4 1 18 3 5 3 17 2 1 4 Config Peer Mode Configuration Manager gt Protocols gt Global Protocols gt NTP gt Peers Server Server only Specifies the mode for the remote time server peer By default Config Peer Mode is set to Server To configure a remote time server peer click on Add and specify the peer s IP address Nortel Networks currently supports only the Server option 1 3 6 1 4 1 18 3 5 3 17 3 1 3 308631 14 20 Rev 00 Configuring IP Utilities Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Local Host Mode Configuration Manager gt Protocols gt Global Protocols gt NTP gt Peers Client Client only Specifies the local mode in which you want to configure the local NTP client Currently Nortel N
86. address of the remote time server whose access to the local NTP client you want to restrict complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens select Protocols 2 Choose Global Protocols The Global Protocols menu opens 3 Choose NTP The NTP menu opens continued 308631 14 20 Rev 00 7 13 Configuring IP Utilities Site Manager Procedure continued You do this System responds 4 Choose Access The NTP Access Configuration List window opens 5 Click on Add The NTP Access Configuration window opens 6 Set the access IP Address parameter Click on Help or see the parameter descriptions on page A 18 7 Click on OK The source IP address of the remote time server whose access you want to restrict appears in the NTP Access Configuration List window Specifying a Filter Type and IP Subnet Mask The NTP filter type parameter allows you to specify whether to drop or accept NTP timestamps destined for a local NTP client By default the filter type is set to Restrict which instructs NTP to drop specific NTP timestamps destined for a local NTP client based on its source IP address and source subnet mask For example if you have 10 remote time servers broadcasting to a router and you want to receive NTP timestamps from only three remote time servers you can restrict the other
87. and enable the DNS client complete the following tasks to specify a DNS server You do this Site Manager Procedure System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose Global Protocols The Global Protocols menu opens 3 Choose DNS The DNS menu opens 4 Choose DNS Servers The DNS Server List window opens 5 Click on Add The DNS Server Record window opens continued 308631 14 20 Rev 00 Starting IP Utilities Site Manager Procedure continued You do this System responds 6 Set the following parameters e Index e IP Address e Port Number Click on Help or see the parameter descriptions beginning on page A 33 7 Click on OK You return to the DNS Server List window 8 Click on Done You return to the Configuration Manager window Starting the DNS Proxy and Specifying Its First DNS Server You can use the BCC or Site Manager to configure DNS proxy server services on a router interface accepting default values for all parameters By default the DNS proxy service you add to your router interface is enabled If you decide to change some or all of the default values see Chapter 10 Customizing the DNS Proxy After you start DNS proxy on a router interface you must specify at least one DNS server You can install DNS server software on any host machine such as a computer running U
88. ansferred from a server to an FTP client or from an FTP client to the server FTP ensures the integrity of data transferred from one system to another Using FTP you can log in to a remote host identify yourself list remote directories copy files to or from the remote host and execute a few simple commands remotely When you enable FTP on the router you can e Download files from a host system to a remote router and retrieve files from the router e Examine the directory listing of files on the remote router e Delete files on the remote router For information about creating the FTP server on the router see Chapter 1 Starting IP Utilities For information about editing FTP parameters see Chapter 4 Customizing FTP Services 308631 14 20 Rev 00 2 7 Configuring IP Utilities How FTP Works The FTP client initiates an FTP session with the FTP server on the router The session establishes two separate connections between host and router as follows e Control connection the communication path between the FTP client and the FTP control server for the exchange of commands and replies used for sending a command request or response e Data connection a full duplex connection over which data is transferred in a specified mode and type between FTP client and FTP server The FTP client residing on the host and the FTP server residing on the router rely on the underlying support of TCP and IP for the reliable s
89. arameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Diagnostic Options Configuration Manager gt Protocols gt Global Protocols gt Telnet Server gt Global Disable Enable Disable Specifies whether the Technician Interface displays Telnet options information Used for diagnostic purposes only Accept the default Disable This parameter is for field service personnel only 1 3 6 1 4 1 18 3 5 3 7 1 19 Manager s Login Script Configuration Manager gt Protocols gt Global Protocols gt Telnet Server gt Global automgr bat The name of the manager s login script file At login executes the manager s login script file automatically If you did not change the name of the manager s login script file accept the default Otherwise enter the new name must be 8 characters or fewer 1 3 6 1 4 1 18 3 5 3 7 1 21 User s Login Script Configuration Manager gt Protocols gt Global Protocols gt Telnet Server gt Global autouser bat The name of the user s login script file At login executes the user s login script file automatically If you did not change the name of the user s login script file accept the default Otherwise enter the new name must be 8 characters or fewer 1 3 6 1 4 1 18 3 5 3 7 1 22 308631 14 20 Rev 00 Parameter Path Default Options Function
90. ble window opens 5 Click on the IP interface that you want to The parameter values for that interface modify appear in the window 6 Set the NetBIOS Name Caching parameter Click on Help or see the parameter description on page A 26 7 Click on Apply and then click on Done You return to the Configuration Manager window 8 10 308631 14 20 Rev 00 Customizing NetBIOS over IP Disabling and Reenabling Inbound and Outbound Broadcasts By default NetBIOS can receive inbound broadcasts on the interface and can send outbound broadcasts To disable or reenable this feature on the interface complete the following tasks using Site Manager Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens Choose IP The IP menu opens 3 Choose NetBIOS The NetBIOS menu opens 4 Choose Interface The NetBIOS IP Interface Table window opens Click on the IP interface that you want to modify Set the following parameters e Enable NetBIOS Inbound Broadcasts e Enable NetBIOS Outbound Broadcasts Click on Help or see the parameter descriptions beginning on page A 26 Click on Apply then click on Done You return to the Configuration Manager window 308631 14 20 Rev 00 8 11 Configuring IP Utilities Supplying a Rebroadcast Address By default
91. bles and disables IP accounting on the router Use this parameter to disable and reenable IP accounting 1 3 6 1 4 1 18 3 5 20 1 1 2 Threshold Configuration Manager gt Protocols gt IP gt Global 512 1 to 10 240 entries Specifies the maximum number of entries in the IP accounting table Specify a maximum number that meets the requirements of IP accounting on this router 1 3 6 1 4 1 18 3 5 20 1 1 3 Trap Percent Configuration Manager gt Protocols gt IP gt Global 80 1 to 100 percent Specifies a value a percentage of the maximum number of entries in the accounting table that causes IP accounting to send a trap message Specify a percentage that meets the requirements of IP accounting on this router 1 3 6 1 4 1 18 3 5 20 1 1 5 A 40 308631 14 20 Rev 00 Parameter Path Default Options Function Instructions MIB Object ID Site Manager Parameters IP Accounting Checkpoint Flag Configuration Manager gt Protocols gt IP gt Global 0 0 to Ox7FFFFFFF Allows you to specify when IP accounting takes a snapshot of the active table and puts it in the checkpoint table Specify a flag value that meets the requirements of IP accounting on this router 1 3 6 1 4 1 18 3 5 20 1 1 7 308631 14 20 Rev 00 A 41 Appendix B Configuring IP Accounting on a Frame Relay Interface IP accounting is a mechanism for counting transit data packets that is packets that IP receives on one inter
92. cal IP interface 1 3 6 1 4 1 18 3 5 3 19 3 1 4 Proxy Mode Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Proxy gt Add Passthru Passthru or NAT_Translation Specifies the mode that the DNS proxy server is operating in For DNS proxy to interoperate with multidomain network address translation NAT specify NAT_Translation Otherwise accept the default value Passthru 1 3 6 1 4 1 18 3 5 3 19 3 1 6 Proxy Listen Port Number Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Proxy gt Add 53 1 to 46000 Specifies the UDP port to which the DNS proxy server listens on the interface on which it is configured In most cases accept the default Only in special situations should you specify another UDP port number 1 3 6 1 4 1 18 3 5 3 19 3 1 5 308631 14 20 Rev 00 A 35 Configuring IP Utilities Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Domain Name Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Proxy gt Add None Any valid domain name Specifies the domain name for this network interface Specify a domain name that matches the one specified for the NAT router interface that relies on DNS proxy for multidomain addre
93. can assign a maximum of three DNS servers for DNS proxy The DNS proxy contacts the DNS servers in a round robin fashion trying to complete a hostname to address resolution request If the first DNS server contacted does not respond within the DNS proxy timeout period then the next configured server is tried This continues until a response is received or until all of the configured servers timeouts have been exceeded For example if your DNS proxy is configured with two DNS servers set the timeout for your DNS client to at least two times the value of the DNS proxy Timeout parameter and the Maximum Retransmissions parameter If you observe an inordinate number of DNS client queries that time out internally you may need to raise the value of the DNS client Timeouts parameter 308631 14 20 Rev 00 10 3 Configuring IP Utilities Using the BCC To modify how DNS proxy on the router handles DNS requests navigate to the DNS proxy prompt for example box ethernet 2 1 ip 192 1 34 67 8 dns proxy and enter one or more of the following parameters DNS proxy parameter and format Description answer truncation lt state gt State is either enabled or disabled The default is disabled domain name lt string gt String specifies the domain name for this network interface Applicable only when the mode parameter is set to nat translation The name must match the domain specified for the NAT router interface that rel
94. ccustpicaazicnaisciaeieauiscesteadiamaintedars P 2 18 Broadcast and Multicast Client Mode iriiciiiiiraiiiissiirannas 2 19 NABIO GS OYERON sriioseian aaa a E e ier erent 2 20 NetBIOS inan IP ENVironmMEenE sisoriiciiriisarnni genasaed PEP iaten E 2 21 Forwarding Name Queries over an Unnumbered Interface c ccceessseeeeeeneees 2 24 DNS OVeSTVIEW sisccseicsassncsbedadseeranieiscs E E A E E A S 2 24 DNS Proy SEVGI sirdinsdeii ee a aa acs E a 112 24 How the DNS Proxy Server Works cc ccesesceeeeneeeeeneeeeeaeeeeeaeeeeeaeeeeeeeeeneaeeeeeeeene 2 25 How the DNS Proxy Cache Works sessirnar Ea 2 26 Chapter 3 Customizing TCP Services Dikabing and Reenabing TOF srisisiinieiienini aiaia A Aaii 3 2 Setting the Minimum Retransmission Timeout c ccccceeeeeeeeeeeeeeeeaeeseeeetseeeteeees 3 3 Setting the Maximum Retransmission Timeout ccccccecceeeeeceeeeeeeeeeeeeaeeseeeeeeeneeeees 3 4 Setting the Maximum Window Size PE PAE E E E E T ees 3 6 Being TOF acerersiaseareseerancestena seeded io nape ana patie ee 3 7 Chapter 4 Customizing FTP Services Configuring FTP Using the BCC or Site Manager eadi adiaiiis SpE T aa 4 2 Disabling and Reenabling FTP soccccustscececunaseconwtensaccs nuns bceca umes secda nuyasedenbenndataannenatedaamanss 4 2 Specifying the FTP Default Volume ssns ER ieee ee 4 3 Specifying the Number of Login RetrieS 0 ccccececececeeeeeneeeeecaeeeeaeeseeeeseeeeeteae
95. ce IP address 4 4 4 4 to override the IP interface source address peer 61 32 5 7 src ip address 4 4 4 4 peer 61 32 5 7 Using Site Manager To specify the source IP address of a remote time server complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols Choose Global Protocols The Protocols menu opens The Global Protocols menu opens 3 Choose NTP The NTP menu opens 4 Choose Peers The NTP Peers Configuration List window opens Click on the IP address of the time server that appears in the NTP Peer list Set the Source IP Address parameter Click on Help or see the parameter descriptions on page A 20 Click on Apply NTP uses the source IP address that you specify to override the source address of the interface from which the NTP packet is transmitted Click on Done You return to the Configuration Manager window 308631 14 20 Rev 00 Configuring IP Utilities Specifying Peer Preference The peer preference parameter allows you to specify a list of remote time servers peers that are preferred by the local NTP client above and beyond the criteria for selecting peers stratum setting closest and claimed higher precision By default the peer preference is turned off This means that the local NTP client rejects packets from the remote time server You can enable pee
96. cedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose Global Protocols The Global Protocols menu opens 3 Choose Telnet Client The Telnet Client menu opens 4 Choose Global The Telnet Client Global Parameters window opens Set the Enable Disable parameter Click on Help or see the parameter description on page A 9 Click on OK Site Manager saves your changes and exits the window Enabling and Disabling Verbose Debug Logging You can specify whether you want to enable or disable verbose debug logging When you enable verbose debug logging you tell the device to display the negotiation process between the Telnet server and Telnet client This parameter is for diagnostic use only By default verbose debug logging is turned off disabled Using the BCC To enable verbose debug logging navigate to the client specific prompt and enter debug log flag on For example the following command enables verbose debug logging client debug log flag on client 308631 14 20 Rev 00 6 23 Configuring IP Utilities Site Manager To disable verbose debug logging navigate to the client specific prompt and enter client debug log flag off client To enable and disable verbose debug logging complete the following tasks Site Manager Procedure You do this System responds 1
97. ches its cache for the current request If an entry exists the DNS proxy immediately returns the answer to the client If it does not find the entry the DNS proxy sends a request to the real DNS server When the response comes back from the DNS server and the TTL is greater than 0 the DNS proxy inserts the response into the cache and returns the response to the client 2 26 308631 14 20 Rev 00 Chapter 3 Customizing TCP Services This chapter describes how to customize TCP services on the router It assumes that you have configured IP on an interface and started TCP using the default parameters as described in Chapter 1 Starting IP Utilities and that you understand the TCP concepts described in Chapter 2 Overview of IP Utilities After you start TCP on the router TCP default values are in effect for all TCP parameters You customize TCP by modifying these parameters as described in the following sections Topic Page Disabling and Reenabling TCP 3 2 Setting the Minimum Retransmission Timeout 3 3 Setting the Maximum Retransmission Timeout 3 4 Setting the Maximum Window Size 3 6 Deleting TCP 3 7 308631 14 20 Rev 00 3 1 Configuring IP Utilities Disabling and Reenabling TCP By default TCP is automatically enabled on the router If you disable TCP it is no longer available on all IP circuits Using the BCC To disable TCP navigate to the TCP prompt for example box ip
98. cify a value from 1 to 2 147 483 647 entries 8 4 308631 14 20 Rev 00 Customizing NetBIOS over IP To specify the maximum number of entries in the NetBIOS name cache complete the following tasks using Site Manager Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose IP The IP menu opens 3 Choose NetBIOS The NetBIOS menu opens 4 Choose Global The Edit NetBIOS IP Global Parameters window opens 5 Set the Max Name Cache Entries parameter Click on Help or see the parameter description on page A 23 6 Click on OK Site Manager returns you to the Configuration Manager window Aging a Cache Entry The router ages cache entries to ensure that cached routes remain consistent with the current network topology If the cache table lookup mechanism does not access a cache entry within the period you set in the appropriate Cache Aging Time parameter the router deletes the entry from the table If the router receives a broadcast name query request from a client and finds the name and associated IP address of the requested server in its cache the router replaces the broadcast address on the name query request with the unicast IP address The router also assigns the entry a short time to live If the entry is valid the router will receive a positive name query response which will validate the entry from
99. claimed precision NTP prefers to have access to several at least three servers at the lower stratum level since it can apply an agreement algorithm to detect a problem on any part of the time source NTP Modes of Operation NTP provides three modes of operation or associations in which time servers and NTP clients can communicate with each other in the synchronization subnet unicast client mode broadcast client mode and multicast client mode Currently Nortel Networks supports only NTP client mode NTP forms an association when two remote time servers exchange messages and one or both of them create and maintain an instantiation of the router Unicast Client Mode Unicast client mode is the recommended mode of operation Use unicast client mode to configure a set of remote time servers or peers for time synchronization You can also configure access control filters for time servers in unicast client mode but normally you would perform this operation in broadcast client or multicast client mode For more information about performing these tasks see Chapter 7 Customizing NTP Services When you configure a set of remote time servers peers NTP creates a peer list that includes each time server s IP address The NTP client uses the peer list to determine which remote time servers to query for time information When the NTP client queries the remote time servers they respond with various timestamps along with information
100. counting maintains two aging counters one for the accounting table and one for the checkpoint table When you copy the contents IP accounting resets both counters to 0 B 4 308631 14 20 Rev 00 Appendix C Configuring IP Global Access Policies Using the BCC you can create global IP access policies that permit or deny access to specific IP services These services are Telnet FTP TFTP NTP SNMP and HTTP Server You define an access policy by setting parameters as described under the following topics Topic Page Creating and Naming the Policy C 2 Specifying the IP Service C 2 Specifying the Policy Action C 3 Specifying the Precedence C 3 Specifying the Network to Which the Policy Applies C 4 Disabling and Reenabling a Policy C 4 Disabling and Reenabling Logging C 5 Global IP Access Policy Example C 5 308631 14 20 Rev 00 C 1 Configuring IP Utilities Creating and Naming the Policy To create an IP global access policy navigate to the IP global prompt for example box ip and enter access policy polname lt policy_name gt policy_name is a unique name for this policy For example the following command sequence creates a policy named policy_1 and displays the current default values for the policy ip access policy polname policy_1 access policy policy_1 info action deny log on service telnet precedence 0 polname policy _1 state enabled Specify
101. ct Instructions In most cases accept the default Only in special situations should you specify MIB Object ID another UDP port number 1 3 6 1 4 1 18 3 5 3 19 2 1 4 DNS Proxy Parameters Use the following guidelines to configure the parameters in the DNS Proxy List window and the DNS Proxy Record window appears when you click on Add from the DNS Proxy List window Parameter Enable Disable Path Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Proxy Default Enable Options Enable Disable Function Enables or disables a DNS proxy on the interface Instructions Accept the default Enable to enable DNS proxy services on this interface To MIB Object ID disable the DNS proxy set this parameter to Disable 1 3 6 1 4 1 18 3 5 3 19 3 1 2 A 34 308631 14 20 Rev 00 Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Site Manager Parameters IP Address Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Proxy gt Add 0 0 0 0 Any valid IP address Specifies the IP address of the local IP interface If you have already configured IP on the interface that IP address appears as the default Either accept that address or supply a different address to use for the lo
102. d 308631 14 20 Rev 00 10 5 Configuring IP Utilities Site Manager Procedure continued You do this parameters e Proxy Mode Domain Name Cache Size 5 Edit one or more of the following Proxy Listen Port Number DNS Server Port Number Timeout in secs Max Retransmissions Answer Truncation Trunc Max Allowed Click on Help or refer to the parameter descriptions that begin on page A 35 System responds 6 Click on Apply 7 Click on Done You return to the Configuration Manager window Modifying the DNS Server List for DNS Proxy When you configure DNS proxy on a router interface you must specify the IP address of at least one DNS server The DNS proxy relies on this DNS server to provide host name and address resolution information for DNS clients You can configure up to three DNS servers for a DNS proxy interface You can add to the list of DNS servers or change the IP address of DNS server entries for an interface configured with DNS proxy Adding Entries to the Server List for DNS Proxy For instructions on starting DNS proxy and specifying a DNS server see Starting the DNS Proxy and Specifying Its First DNS Server on page 1 17 These instructions also apply for adding a second or third DNS server for DNS proxy 10 6 308631 14 20 Rev 00 Customizing the DNS Proxy Changing the IP Address of an Entry in the DNS Proxy Server List You can change the IP addre
103. d None The IP address of the NetBIOS station Specifies an IP address to associate with the statically configured name Enter the valid IP address of a NetBIOS station 1 3 6 1 4 1 18 3 5 3 11 4 1 6 A 28 308631 14 20 Rev 00 Site Manager Parameters DNS Client Parameters Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Use the following guidelines to configure the parameters in the DNS Configuration window Enable Configuration Manager gt Protocols gt Global Protocols gt DNS gt Create DNS Client Enable Enable Disable Enables or disables DNS on the router Accept the default Enable to enable DNS client services on this router To temporarily disable DNS set this parameter to Disable 1 3 6 1 4 1 18 3 5 3 19 1 2 Time Out Configuration Manager gt Protocols gt Global Protocols gt DNS gt Create DNS Client 5 1 to 60 seconds Specifies in seconds the amount of time that the router waits before it retransmits a request to the DNS server If you have a large network set this value higher than the default so that the router will not time out before it receives a response from the DNS server Otherwise accept the default 1 3 6 1 4 1 18 3 5 3 19 1 3 308631 14 20 Rev 00 A 29 Configuring IP Utilities Parameter Path Default Options Function Instructions
104. d and enabled on the router and enabled on this interface use this parameter to enable and disable inbound broadcasts as required 1 3 6 1 4 1 18 3 5 3 11 2 1 9 Enable NetBIOS Outbound Broadcasts Configuration Manager gt Protocols gt IP gt NetBIOS gt Interface Enable Enable Disable Enables or disables outbound broadcasts on this interface If NetBIOS is configured and enabled on the router and enabled on this interface use this parameter to enable and disable outbound broadcasts as required 1 3 6 1 4 1 18 3 5 3 11 2 1 10 A 26 308631 14 20 Rev 00 Parameter Path Default Options Function Instructions MIB Object ID Site Manager Parameters NetBIOS Rebroadcast IP Address Configuration Manager gt Protocols gt IP gt NetBIOS gt Interface Null An IP broadcast address Specifies a broadcast address to use when rebroadcasting NetBIOS packets out this interface By default NetBIOS uses the IP broadcast address configured for this interface Set this parameter if you want to override this broadcast address 1 3 6 1 4 1 18 3 5 3 11 2 1 11 NetBIOS IP Static Entry Table Parameters Parameter Path Default Options Function Instructions MIB Object ID Use the following guidelines to configure the parameters in the NetBIOS IP Static Entry Table window Enable Configuration Manager gt Protocols gt IP gt NetBIOS gt Static Name Enable Enable Disable Enables or dis
105. dard protocol for transferring files with minimum capability and minimal overhead TFTP is implemented on top of the unreliable connectionless datagram delivery service and is used to move files between network devices TFTP was designed to be small and easy to implement Because it is small it is more restrictive lacking most of the features of the File Transfer Protocol FTP TFTP provides inexpensive unsophisticated file transfer service only It cannot list directories and provides no authentication TFTP runs on top of the User Datagram Protocol UDP and uses timeout and retransmission to ensure that data arrives Each file transfer begins with a request to read or write to a file this request also serves to ask for a connection If the server grants the request the connection is opened and the file is sent in fixed length blocks data packets of 512 bytes Each data packet contains one block of data and must be acknowledged by an acknowledgment packet before the next packet is sent A data packet of less than 512 bytes terminates the transfer If a packet gets lost in the network the intended recipient will time out and may retransmit its last packet which can be data or an acknowledgment causing the sender of the lost packet to retransmit the packet Because the lock step acknowledgment guarantees that all older packets have been received the sender keeps one packet only on hand for transmission 2 10 308631 14 20 Rev 00
106. des segments received on currently established connections Total number of segments sent including those on the current connections but excluding those containing only retransmitted octets Total number of segments retransmitted that is the number of TCP segments transmitted containing one or more previously transmitted octets 308631 14 20 Rev 00 D 7 Configuring IP Utilities Bad Segments Received Segments Sent Containing the Reset Flag show telnet Total number of segments received in error Number of TCP segments sent containing the reset flag The show telnet command displays information about Telnet services The output includes the following information Telnet Server Statistics State Prompt Lines Screen Max Login Retries Login Timeout min Passwd Timeout min Command Timeout min Telnet Client Statistics State Prompt Remote Port Telnet In Bound Sessions Remote Address Remote Port Local Address Local Port Current state of the Telnet server enabled or disabled Character string used as the system prompt on the Telnet BCC console Number of lines that can be displayed in one screen on the Telnet BCC console Number of retries allowed after a failed login before the system disconnects Number of minutes allowed between when the system displays the login banner and a user enters a login ID Number of minutes allowed to enter a password If this timeout per
107. displays information about the number of e Polls requests for information sent by the local NTP client to the designated remote NTP server e Packets received by the local NTP client from the designated remote NTP server The output includes the following information IP Address Polls Sent Packets Received IP address of this remote NTP server Number of polls requests for information sent from the local NTP client to this NTP server Number of NTP packets received and accepted from this remote NTP server The show tcp connections command displays information about each Transmission Control Protocol TCP connection The table includes the IP address port numbers and state associated with each connection The output includes the following information Local IP Address Local Port Remote IP Address Remote Port State Md5 Errors Local IP address for this TCP connection In the case of a connection in the listen state that will accept connections for any IP interface associated with the node the value 0 0 0 0 is used Local port number for this TCP connection Remote IP address for this TCP connection Remote port number for this TCP connection Current state of TCP Possible values are up 1 down 2 init 3 and not present 4 Number of TCP packets dropped due to MD5 authentication errors D 6 308631 14 20 Rev 00 show tcp stats BCC show Commands The show tcp stats command di
108. dix D BCC show Commands Online Help for Show Commands c ccccescceeeeeeeeeneeeeeseeseeeeeeeeaeeeeeaeeeecaeeeteaeeeseaaeesaas D 2 STW EIS SORUN E D 2 Bri Ue SINS E A PAE an aie ee D 3 show ftp iia ee ee N LO STUN TIL UOOOSS orrien caiac idade aisar naaar riedia a edia D 4 e e E E E A her E E A E E EEE TE D 5 ONNO DO aa tepsgunactepepavacteceiesecucueasenmeersariamhe ua eas aimma D 5 SRONA IANS a A D 6 eA e keane s I E lente A E ATA A A E E E D 6 Show Eo SIAS sisindiran iakon si oe a n eiai e TAN raa D 7 SMON IONO ucne aa a D 8 ON E cra tac aeaucbesudeyennes Weems lade eee ee D 9 Index 308631 14 20 Rev 00 xi Figures Figure 21 TCP Between IP sand Cenis s s ciideti as ai ieenaacieeey 2 6 Foue 22 FIP Cli ntand Server issicecscinissccevemniseuceeisesra ands eal iets ehaaiebeecmneeane 2 8 Figure 2 3 Telnet SEVEN icsccssacinsvcssscsasixeistcasesvenniocddveanonttanriniesiannscceateanedantamasaaiems 2 13 Foue TE EER aae aiT ai aiii 2 14 Figure 2 5 NTP Time Servers Forming a Synchronization Subnet s s 2 16 Figure 2 6 NTP Time Servers Operating in Unicast Client Mode eeeeee 2 19 Figure 27 NelBIOS over IP nra E ER 2 20 Figure 2 8 Broadcasting a Name Query Request ccssceeeseeeseneeeseteeeteneeeeeaees 2 22 Figure 2 9 Returning a Unicast Name Query Response n 2 23 308631 14 20 Rev 00 xiii Tables Table 2 1 TOP Pos ial BSS sissekanne RN A EE RTA 2 3 Table 2 2 TOF Conneccio
109. dress 0 0 0 0 fwd server3 address 0 0 0 0 max answers truncated 1 max cache size 20 max queries allowed 20 max retransmissions 2 mode pass through port 53 state enabled timeout 5 Step 2 Specify a DNS Server for DNS Proxy After you create and enable the DNS proxy server on a router interface from the DNS proxy interface prompt specify a DNS server For example dns proxy 192 1 34 67 fwd serverl address 63 122 49 86 dns proxy 192 1 34 67 fwd server1l address fwd serverl address 63 122 49 86 dns proxy 192 1 34 67 308631 14 20 Rev 00 Starting IP Utilities Specifying an IP address for the fwd serverl address parameter specifies that the DNS server at 63 122 49 86 will forward requests to this domain The fwd server1 address command then displays the current value for the fwd server1 address parameter Using Site Manager To configure the DNS proxy server and specify one or more DNS servers for which the router will act as a proxy complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose Global Protocols The Global Protocols menu opens 3 Choose DNS The DNS menu opens 4 Choose DNS Proxy The DNS Proxy List window opens 5 Click on Add The DNS Proxy Record window opens 6 Set the following parameters e IP Address e DNS Server 1 e DNS Server 2 e DNS Serve
110. e ip ftp and enter default volume lt volume_number gt volume _number is an integer from 1 through 14 la through 4a or 1b through 4b 308631 14 20 Rev 00 4 3 Configuring IP Utilities In the following example the default volume value is set to 5 and the info command displays configured values ftp default volume 5 ftp info default volume 5 login retries 3 idle timeout 900 max sessions 3 tcp window size 60000 state disabled ftp Using Site Manager To specify the FTP default volume complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols 2 Choose Global Protocols The Protocols menu opens The Global Protocols menu opens 3 Choose FTP The FTP menu opens 4 Choose Global The Edit FTP Global Parameters window opens 5 Set the Default Volume parameter Click on Help or see the parameter description on page A 5 6 Click on OK You return to the Configuration Manager window 308631 14 20 Rev 00 Customizing FTP Services Specifying the Number of Login Retries The FTP login retries value is the number of FTP login retries that FTP will accept before rejecting logins By default FTP accepts only three FTP login retries Using the BCC To change the number of retries navigate to the FTP prompt for example ip ftp and enter login retries lt
111. e Add menu opens 11 Choose UDP Frame The UDP Frame menu opens 12 Choose Destination Port The Edit Range screen opens 13 Type 137 for the minimum value and the maximum value 14 Click on OK The Create IP Template window opens 15 Choose Action The Action menu opens 16 Choose Add The Add menu opens 17 Choose Forward to Next Hop The Next Hop window opens 18 Type the IP address of this interface the interface on which you are configuring the traffic filter Then click on OK 308631 14 20 Rev 00 8 15 Configuring IP Utilities Deleting NetBIOS from the Router To delete NetBIOS over IP service from the router complete the following tasks using Site Manager You do this Site Manager Procedure System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose IP The IP menu opens 3 Choose NetBIOS The NetBIOS menu opens 4 Choose Delete NetBIOS IP 5 Click on OK A message box prompts Do you REALLY want to delete NetBIOS IP completely from this router Site Manager deletes NetBIOS over IP 8 16 308631 14 20 Rev 00 Chapter 9 Customizing the DNS Client This chapter describes how to customize DNS client services on the router It assumes that you have A machine with DNS server installed Configured IP on a router interface for instructions see Configuring IP for Global Protocols
112. e IP and start FTP all FTP default values are automatically enabled on the router Using the BCC To disable FTP on the router navigate to the FTP prompt for example box ip ftp and enter disable For example ftp disable ftp state state disabled To reenable FTP navigate to the FTP prompt and enter enable 4 2 308631 14 20 Rev 00 Customizing FTP Services For example ftp enable ftp state state enabled Using Site Manager To enable and disable FTP on the router complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose Global Protocols The Global Protocols menu opens 3 Choose FTP The FTP menu opens 4 Choose Global The Edit FTP Global Parameters window opens 5 Set the Enable Disable parameter Click on Help or see the parameter description on page A 5 6 Click on OK You return to the Configuration Manager window Specifying the FTP Default Volume The FTP default volume is the file system volume to which FTP writes transferred files and from which FTP retrieves files for transfer By default the FTP default volume is 2 on the BN router and 1 on the BayStack router If you are configuring an AN router you must specify volume 1 Using the BCC To specify the FTP default volume navigate to the FTP prompt for exampl
113. e Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose Global Protocols The Global Protocols menu opens 3 Choose Telnet Server The Telnet Server menu opens 4 Choose Global The Telnet Server Global Parameters window opens Set the Login Retries parameter Click on Help or see the parameter description on page A 12 Click on OK Site Manager saves your changes and exits the window Using Telnet Server Diagnostics This section describes how to configure Telnet server diagnostic parameters to customize the way the Technician Interface performs diagnostics on a router Field Service personnel use these features to troubleshoot problems Enabling Diagnostic Reporting The Diagnostic Report parameter allows field personnel to specify whether the Technician Interface displays a report that shows a record of all processing operations By default recording of processing operations is disabled 6 16 308631 14 20 Rev 00 Customizing Telnet Services To enable the Technician Interface to display a report showing a record of all processing operations complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols 2 Choose Global Protocols The Protocols menu opens The Global Protoco
114. e Telnet server prompt and enter enable For example server enable server state state enabled Using Site Manager To disable or reenable a Telnet server on an IP router complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose Global Protocols The Global Protocols menu opens 3 Choose Telnet Server The Telnet Server menu opens 4 Choose Global The Telnet Server Global Parameters window opens Set the Enable Disable parameter Click on Help or see the parameter description on page A 16 Click on OK Site Manager saves your changes and exits the window 6 8 308631 14 20 Rev 00 Customizing Telnet Services Specifying the Maximum Number of Lines on the Console You can specify the maximum number of lines displayed on the Telnet console screen By default the maximum number of lines displayed on the Telnet screen is 24 If Telnet can negotiate the window size with the remote client the screen properties may override the number of lines you specify Make sure that the number that you set is in accordance with your console requirements Using the BCC To specify the maximum number of lines displayed on the Telnet screen enter lines lt integer gt integeris the maximum number of lines that the console screen can display For example
115. e from the router using the BCC or Site Manager Using the BCC To delete Telnet client from the router navigate to the client prompt and enter delete For example client delete telnet 6 26 308631 14 20 Rev 00 Customizing Telnet Services Using Site Manager To delete Telnet client from the router complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols Choose Global Protocols The IP menu opens Choose Telnet Client The Telnet Server menu opens Choose Delete Telnet Client A message box prompts Do you REALLY want to delete Telnet Client 5 Click on OK Site Manager deletes Telnet client 308631 14 20 Rev 00 6 27 Chapter 7 Customizing NTP Services This chapter describes how to customize NTP services on the router It assumes that you have configured IP on an interface and started NTP using the default parameters as described in Chapter 1 Starting IP Utilities and that you understand the NTP concepts described in Chapter 2 Overview of IP Utilities After you start NTP on the router NTP default values are in effect for all NTP parameters You customize NTP by modifying these parameters as described in the following sections Topic Page Configuring NTP Using the BCC or Site Manager gee Disabling and Reenab
116. e on this interface If NetBIOS has received this packet before the router drops it By default the NetBIOS Rebroadcast Record Route parameter in rebroadcast packets is disabled If all IP entities support this option enable it on the router 8 8 308631 14 20 Rev 00 Customizing NetBIOS over IP To specify whether to enable or disable the rebroadcast of record routes complete the following tasks using Site Manager Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens Choose Protocols 2 Choose IP The IP menu opens 3 Choose NetBIOS The NetBIOS menu opens 4 Choose Global The Edit NetBIOS IP Global Parameters window opens 5 Set the Rebroadcast Record Route parameter Click on Help or see the parameter description on page A 25 6 Click on OK Site Manager returns you to the Configuration Manager window Customizing NetBIOS on an IP Interface NetBIOS software on the router communicates with NetBIOS clients and servers through IP interfaces that have been configured with NetBIOS You can customize the default values for NetBIOS on a router IP interface Disabling and Reenabling NetBIOS on an Interface When you configure NetBIOS on a router interface NetBIOS is automatically enabled To disable and reenable NetBIOS on the interface complete the following tasks using Site Manager Site Manager Procedure
117. e router connections slow down or even abort TCP uses feedback mechanisms to indicate to clients when resources are becoming scarce However if clients disregard this feedback TCP has to break connections TCP attempts to monitor and break the connections consuming the most memory to maintain connections consuming less memory TCP and IP Service Users TCP is the layer between IP and protocols running at higher layers in the network hierarchy Figure 2 1 shows a simple network architecture with users of TCP IP services Telnet FTP and BGP TCP0001A Figure 2 1 TCP Between IP and Clients 2 6 308631 14 20 Rev 00 Overview of IP Utilities The interface between TCP and programs that use TCP consists of a set of messages exchanged between the clients and TCP and a set of functions and macros that user programs call to exchange TCP messages These programs use the functions and macros to e Open close abort and get the status of connections e Control the flow of data e Encapsulate data for TCP to transmit e Process received TCP data When a program passes data to TCP the TCP layer formats the data and calls on the IP layer to transmit the data to its destination For information about creating TCP on the router see Chapter 1 Starting IP Utilities For information about editing TCP parameters see Chapter 3 Customizing TCP Services FTP Overview The File Transfer Protocol allows files to be tr
118. ed in the DNS specification RFC 833 To create a static entry complete the following steps using Site Manager Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose IP The IP menu opens 3 Choose NetBIOS The NetBIOS menu opens 4 Choose Static Names The NetBIOS IP Static Entry Table window opens 5 Click on Add The NBIP Addresses window opens 6 Set the following parameters e NetBIOS Station Name e NetBIOS Scope ID e IP Address Click on Help or see the parameter descriptions beginning on page A 28 7 Click on OK You return to the Configuration Manager window 308631 14 20 Rev 00 8 13 Configuring IP Utilities Disabling and Reenabling Static Name Caching By default NetBIOS caches the names you added statically To disable and reenable static name caching complete the following tasks using Site Manager Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose IP The IP menu opens 3 Choose NetBIOS The NetBIOS menu opens 4 Choose Static Name The NetBIOS IP Static Entry Table window opens 5 Click on the static entry that you want to modify 6 Set the Enable parameter Click on Help or see the parameter description on page
119. eeeeeseaeeeeeaeeees 9 10 Deleting DNS Client Services from the Router 0006 E peace aati adeeeeces 9 11 308631 14 20 Rev 00 ix Chapter 10 Customizing the DNS Proxy Disabling and Reenabling DNS Proxy Services on a Router Interface c0 10 2 Modifying the DNS Proxy Configuratio sssrinin aiaia 10 3 Timeout Considerations for DNS Clients Served by DNS Proxy n se tai 10 3 Modifying the DNS Server List for DNS Proxy lt sccccc ccccecsececsscns caste cessannes danas 10 6 Adding Entries to the Server List for DNS Proxy eeceeceeseeeeeeeeeeteeeeeeeeneetenees 10 6 Changing the IP Address of an Entry in the DNS Proxy Server List areke 10 7 Deleting DNS Proxy Services from a Router Interface ccccceceeceeeeeeeeeeeeeteeeeseaees 10 8 Appendix A Site Manager Parameters TOP Gopal PAMETE naan E EE aon inion a Canute niaeteeees A 3 PU Catal PASTS cieie remnants a A A 5 TFTP Parameters P genenanys E E E A A 8 Telnet Server Global Parameters srnisoniasisinasn aa A 9 Telnet Client Global Parameters ineesesreersrrrrernnn aes elas Berar aie A 16 NTF POTS sasiscncicrss skcctctunisalienmdienedecenieeeehmerbaceataer a tetanic luca adaini atii A 17 NetBIOS Global Parameters niseni ienaa aasa kaaa an naai eaii A 21 NetBIOS IP Interface Table Parameters sscisvccsaissceccacaeive ccesgsceceaseaaiaccrepeassonenpssananece n A 25 NetBIOS IP Static Entry Table Parameters sosneosseesssee
120. eeteeeess 4 5 vi 308631 14 20 Rev 00 Specifying the Maximum FTP Idle Timeout so c csecccseccessiiserseestvoenteessines diet taeeseee aanacezers 4 6 Specifying the Maximum Number of FTP Sessions s an sadn eee 4 7 Specifying the Type of Service for Data Transmission 0 iann 4 8 Specifying the FTP Control Connection ssssssssesseeessesssesssssrnsereneresnerennetsnesrnnernnsennseea 4 9 Speciiving a Data Transtar Vale srnasinnibininennsir a a 4 10 Spechving The TOP Window SIZE os crseicsassersrasiieseri eterna eeii n AT 4 10 Boe laei i ae Rr E E A A A errr nner tir mee eer S E Tree T T 4 12 Chapter 5 Customizing TFTP Services Disabling and Reenabling TFTP Services sssssseseessesersesrrsssreerrrterrensrensrrnserennerenennn 5 2 Specifying the Default Volume for the Router reer ene ee err err 5 3 Specifying a Retry Timeout VME sites ccc ccesanateeerssensicgeis qarenitinentans tenia ade Eiu 5 4 Speciiying A Close Timeout ValS iii csdasseccdsrensaiecass serennsacanatecatmhihondsleaieaedlitsameaansee 5 5 Specifying the Number of Retransmissions c cccccceeeceeeeeeeeeeeeeeeeaeeseeaeeteneeeees 5 6 Deleting TFTP rom tho ROUET risiini iir Gii ans Hen bite enti een 5 7 Chapter 6 Customizing Telnet Services Configuring Telnet Using the BCC or Site Manager ssssssesessssesssresrirrsrrresrnssrrrssrnses 6 2 Customizing the Telnet Configuration occ secsinesaiceccesctacastasensesannsnnasndasaeesceazexnnaneansause
121. efault Options Function Instructions MIB Object ID Site Manager Parameters Trunc Max Allowed Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Proxy gt Add 1 1 to 100 If the Answer Truncation parameter is enabled the Trunc Max Allowed parameter specifies the maximum number of answers returned to the requester Specify the maximum number of answers to be returned to the requester 1 3 6 1 4 1 18 3 5 3 19 3 1 16 Cache Size Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Proxy gt Add 20 1 to 100 Specifies the maximum number of cache entries that the DNS proxy allows to be stored on the router Accept the default or enter a value from 1 to 100 If you select a high value be sure that the router has enough memory to accommodate the number of cached entries that you specify 1 3 6 1 4 1 18 3 5 3 19 3 1 17 308631 14 20 Rev 00 A 39 Configuring IP Utilities IP Accounting Parameters Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Use the following guidelines to configure the IP accounting parameters in the Edit IP Global Parameters window Enable Configuration Manager gt Protocols gt IP gt Global Enable Enable Disable Ena
122. elnet terminal emulation program to establish a remote session on a router Figure 2 3 In this case the PC is defined as a Telnet client and the router as a Telnet server 2 12 308631 14 20 Rev 00 Overview of IP Utilities telnet Telnet server IAI felolelolotetoteto Inbound Telnet session 4 gt 0 TCP connection TCP0004A Figure 2 3 Telnet Server Telnet Client When you create a Telnet client the router sends outbound requests to a remote host to establish a Telnet session on a remote node After the router establishes the Telnet session you can access all Technician Interface commands If you have established a terminal console cable connection to a router you can log in to the local router and use the Telnet command to establish a remote session on a remote router Figure 2 4 In this case the local router is defined as the Telnet client and the remote router as the Telnet server 308631 14 20 Rev 00 2 13 Configuring IP Utilities telnet Telnet client Telnet server Outbound Telnet session Console cable TCP connection TCP0005A Figure 2 4 Telnet Client 2 14 308631 14 20 Rev 00
123. enu opens choose Protocols 2 Choose IP The IP menu opens 3 Choose TFTP The TFTP menu window opens 4 Choose Edit TFTP Parameters The Edit TFTP Parameters window opens 5 Set the Default Volume parameter Click on Help or see the parameter description on page A 8 6 Click on OK You return to the Configuration Manager window Specifying a Retry Timeout Value You can specify the amount of time in seconds that TFTP waits for an acknowledgment before retransmitting the last packet By default TFTP waits 5 seconds for an acknowledgment before retransmitting the last packet Using the BCC To specify a retry timeout value navigate to the TFTP prompt and enter retry timeout lt integer gt integer is any number of seconds For example the following command causes TFTP to wait 10 seconds before it retransmits the last packet tfitp retry timeout 10 tftp 5 4 308631 14 20 Rev 00 Customizing TFTP Services Using Site Manager To specify the number of seconds that TFTP waits for an acknowledgment complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose IP The IP menu opens 3 Choose TFTP The TFTP menu opens 4 Choose Edit TFTP Parameters The Edit TFTP Parameters window opens 5 Set the Retry Time Out parameter Click on Help or see the paramete
124. equenced transfer of data and control messages Figure 2 2 Host Router FTP FTP client server Control connection Data connection TCPO002A Figure 2 2 FTP Client and Server 2 8 308631 14 20 Rev 00 Overview of IP Utilities Table 2 3 describes the FTP commands that the FTP server supports on Nortel Networks routers Table 2 3 FTP Commands Supported Command Code Description Access Control Commands User Name USER Initiates an FTP session for the user Password PASS Specifies a users encrypted identification for access control Logout QUIT Terminates the session and closes the control connection Transfer Parameter Commands Data Port PORT Specifies the data port to be used in the data connection Representation TYPE Specifies the data transfer type The server supports transfer Type of ASCII and image binary data Transfer Mode MODE Specifies the transfer mode The server supports stream mode only File Structure STRU Specifies the file structure type The server supports file no record structure only FTP Service Commands Retrieve RETR Causes the server to transfer the specified file to the client Abort ABOR Causes the server to abort the previous FTP service command and any associated transfer of data Store STOR Causes the server to accept the data transferred over the data connection and store it on the server Store Unique
125. er B Router C ae i Router D Key Client Server NetBIOS IP Interface IP0033A Figure 2 8 Broadcasting a Name Query Request 2 22 308631 14 20 Rev 00 Overview of IP Utilities The server responds to the name query request by issuing a positive name query response containing the IP address of the server to NetBIOS on the host The following steps occur Figure 2 9 1 NetBIOS sends the response to router A as a unicast message 2 Router A and router B forward the unicast response to the awaiting client Now that the client has obtained the server s IP address from the name query response client and server can communicate by exchanging IP messages Router A 5 q Router B lt q Router C 5 Router D Key Client Server NetBIOS IP Interface IP0034A Figure 2 9 Returning a Unicast Name Query Response 308631 14 20 Rev 00 2 23 Configuring IP Utilities Forwarding Name Queries over an Unnumbered Interface NetBIOS cannot be configured directly on an unnumbered interface Because of this restriction name query requests cannot be broadcast over an unnumbered interface To forward name query requests over unnumbered interfaces the network administrator configures a static NetBIOS name entry to the proper NetBIOS name
126. er you create and enable the DNS client on the router you must specify at least one DNS server with which the DNS client can communicate You can install DNS server software on any host machine such as a computer running UNIX DNS server software is available from third party suppliers The router that has DNS client configured must have an interface that connects to the computer running DNS server You can specify up to three DNS servers for a router configured with DNS client Before you begin verify that IP is configured on a router interface For instructions see Verifying that IP Is Configured on a Router Interface on page 1 5 If IP is not yet configured see Configuring IP for Global Protocols on page 1 2 for instructions Using the BCC To configure DNS client on the router you must 1 Start the DNS client 2 Specify a DNS server for the DNS client 1 14 308631 14 20 Rev 00 Starting IP Utilities Step 1 Start the DNS Client To start a DNS client on the router with default settings begin in configuration mode at the box or stack prompt 1 Configure DNS box dns dns 2 Display DNS default settings dns info authoritative only disabled domain name hosts file ignore truncation enabled max outstanding queries 20 max retransmissions 3 recursion enabled state enabled time out 5 use default domain enabled Step 2 Specify a DNS Server for the DNS Client After you create and enable D
127. et reached their destination 1 3 6 1 4 1 18 3 5 3 3 1 6 Max Window Size bytes Configuration Manager gt Protocols gt Global Protocols gt TCP gt Global 4096 512 through 65535 bytes Sets the maximum transmit and receive window size that TCP allows for each connection Specify the window size The larger the window size the more memory each TCP connection consumes 1 3 6 1 4 1 18 3 5 3 3 1 18 A 4 308631 14 20 Rev 00 Site Manager Parameters FTP Global Parameters Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Use the following guidelines to configure the parameters in the Edit FTP Global Parameters window Enable Disable Configuration Manager gt Protocols gt Global Protocols gt FTP gt Global Enable Enable Disable Specifies whether the FTP subsystem is enabled or disabled Specify Disable if you want to disable FTP on the router 1 3 6 1 4 1 18 3 5 3 10 1 2 Default Volume Configuration Manager gt Protocols gt Global Protocols gt FTP gt Global 2 1 to 13 lato 4a 1b to 4b Specifies the number of the file system volume to which FTP writes transferred files and from which FTP retrieves files for transfer Specify the appropriate volume number If you are configuring an AN router y
128. etworks supports only unicast client mode Accept the default 1 3 6 1 4 1 18 3 5 3 17 3 1 5 Source IP Address Configuration Manager gt Protocols gt Global Protocols gt NTP gt Peers None Any valid IP address Allows you to specify a single IP address that NTP uses to override the source address of the interface from which the NTP packet is transmitted You use this parameter only when you want the remote time server to filter NTP packets based on IP source address We recommend using a circuitless IP address as the source IP address If you do not specify a source IP address NTP uses the IP address of the outbound router IP interface Specify the source IP address of a remote time server 1 3 6 1 4 1 18 3 5 3 17 3 1 7 A 20 308631 14 20 Rev 00 Parameter Path Default Options Function Instructions MIB Object ID Site Manager Parameters Peer Preference Configuration Manager gt Protocols gt Global Protocols gt NTP gt Peers No Yes No Allows you to specify whether the local NTP client will prefer accept or rejects NTP packets from the remote time server When you select Yes the local NTP client prefers accepts NTP packets from the remote time server and synchronizes its internal clock to it When you select No the local NTP client rejects packets from the remote time server 1 3 6 1 4 1 18 3 5 3 17 3 1 8 NetBIOS Global Parameters Parameter Path Default Options Functi
129. face and forwards out another interface This mechanism allows a network service provider to bill a network user according to the amount of data that it routes between two locations Nortel Networks provides IP accounting support for synchronous interfaces configured with frame relay in group access mode the default mode and direct mode IP accounting counts all data packets that the router receives on any IP interface and forwards out an IP frame relay interface IP accounting keeps track of transit data packets by making an entry for each packet in an IP accounting table Each entry includes the following fields the source address of the packet the destination address of the packet the number of packets forwarded and the number of bytes forwarded Caution If the frame relay interface becomes overrun and the driver drops packets these packets will still be counted by IP accounting 308631 14 20 Rev 00 B 1 Configuring IP Utilities The following sections describe how to configure IP accounting on a frame relay interface Topic Page Enabling IP Accounting on the Router B 2 Specifying the Maximum Size of the IP Accounting Table B 3 Controlling Notification of a Full IP Accounting Table B 3 Copying the IP Accounting Table to the Checkpoint Table B 4 Enabling IP Accounting on the Router By default IP accounting support is disabled on the router You can use Site Manager to enable
130. formation Parameter name Configuration Manager menu path Default setting Valid parameter options Parameter function Instructions for setting the parameter Management information base MIB object ID The Technician Interface allows you to modify parameters by issuing set and commit commands with the MIB object ID This process is equivalent to modifying parameters using Site Manager For more information about using the Technician Interface to access the MIB see Using Technician Interface Software Caution The Technician Interface does not verify the validity of your parameter values Entering an invalid value can corrupt your configuration 308631 14 20 Rev 00 Site Manager Parameters TCP Global Parameters Use the following guidelines to configure TCP global parameters in the Configuration Manager window Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Enable Disable Configuration Manager gt Protocols gt Global Protocols gt TCP gt Global Enable Enable Disable Enables or disables TCP on the router Select Disable to disconnect from TCP Also you can select Disable if you do not need TCP but want to access previous TCP statistics 1 3 6 1 4 1 18 3 5 3 3 1 2 Min Retransmission Timeout msec Configuration Manager gt Protocols gt Global Protocols gt TCP gt Global
131. g the BCC or the Technician Interface If you decide to change some or all of the default values see Chapter 5 Customizing TFTP Services Using the BCC To start TFTP on the router with default settings begin in configuration mode at the box or stack prompt 1 Configure TFTP box tftp tftp 2 Display TFTP default settings tftp info close timeout 25 default volume 2 1 8 308631 14 20 Rev 00 Starting IP Utilities retry count 5 retry timeout 5 state enabled Using Site Manager To start TFTP from Site Manager first complete the following tasks in local mode to create a configuration file Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose IP The IP menu opens 3 Choose TFTP A confirmation window opens 4 Choose Create Site Manager enables TFTP on the router After you create the configuration file on your workstation you must transfer this file to the router for TFTP to be enabled Starting Telnet Services You can use the BCC or Site Manager to configure Telnet services on the router accepting default values for all parameters If you decide to change some or all of the default values see Chapter 6 Customizing Telnet Services Before you begin verify that IP is configured on a router interface For instructions see Verifying that IP Is Configured
132. he parameter description on page A 14 6 Click on OK Site Manager saves your changes exits the window and returns you to the Configuration Manager window Changing the Name of the User s Login Script File By default the name of the user s login script file is autouser bat You can specify anew name for the user s login script file by supplying an 8 character file name If you do not want to change the name of the user s login script accept the default name Using the BCC To specify the name of the user s login script file navigate to the server specific prompt and enter auto user script lt string gt string is the name of the user s login script file For example the following command causes the system to automatically execute the script file router1 bat at login server auto user script router1 bat server 308631 14 20 Rev 00 Customizing Telnet Services Using Site Manager To specify a new user s login script file complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose Global Protocols The Global Protocols menu opens 3 Choose Telnet Server The Telnet Server menu opens 4 Choose Global The Telnet Configuration window opens 5 Set the User s Login Script parameter Click on Help or see the parameter description on page A 14 6
133. he BCC or Site Manager to perform each task Table 6 1 Telnet Configuration Tasks Task BCC Site Manager Changing the Name of the Manager s Login Script File v Changing the Name of the User s Login Script File Enabling and Disabling User Logout Disabling and Reenabling a Telnet Server on the IP Router SISINIS SINIS Specifying the Maximum Number of Lines on the Console lt lt Pausing Telnet Console Output Changing the Telnet Login Prompt Changing the Login Timeout Changing the Password Timeout Changing the Command Timeout Changing Login Retries SISISISINIS Using Telnet Server Diagnostics Changing the History File sS Disabling and Reenabling a Telnet Client on the IP Router SISISISISISISNSISIS Enabling and Disabling Verbose Debug Logging S Changing the Remote Port S sS Changing the Command Prompt 308631 14 20 Rev 00 Customizing Telnet Services Customizing the Telnet Configuration After you start the Telnet server to establish inbound Telnet sessions on the router the script files for the Manager s Login User s Login and Force User s Login run automatically when you log in You can accept these defaults or customize the Telnet configuration by changing these scripts as needed The Telnet customization procedures decribed in this section are as
134. he root and the secondary servers of decreasing accuracy at successive levels from the primary servers Primary server Stratum 1 TCPO007A Figure 2 5 NTP Time Servers Forming a Synchronization Subnet In the NTP model the synchronization subnet automatically reconfigures in a hierarchical master slave configuration to produce the most accurate and reliable time even when one or more primary time servers or the network path between them fails This includes a case in which all the primary servers on a partitioned subnet fail but one or more backup primary servers continue to operate Should all primary time servers in the subnet fail the remaining secondary servers will synchronize among themselves 2 16 308631 14 20 Rev 00 Overview of IP Utilities How NTP Distributes Time Within the Subnet NTP distributes time through a hierarchy of primary and secondary time servers with each server adopting a stratum see Figure 2 5 on page 2 16 A stratum defines how many NTP hops away a particular secondary time server is from an authoritative time source primary time server in the synchronization subnet A stratum 1 time server located at the top of the hierarchy is directly attached to an external time source typically a wire or radio clock a stratum 2 time server receives its time via NTP from a stratum 1 time server a stratum 3 time server receives its time via NTP from a strat
135. hed correctly Data transfer is straightforward and follows the procedures for flow control and acknowledgment TCP performs all acknowledgment and assigns all credits in terms of octets A credit of eight 8 then allows sending only 8 octets of data not 8 PDUs To release a connection one TCP sends a PDU with the FIN flag set and a sequence number one greater than that assigned to the last octet of the transmitted data Upon receipt of this PDU the responding TCP sends back a PDU carrying an ACK for the FIN s sequence number and a FIN of its own this ACK or FIN may appear in the same PDU or in different PDUs The TCP that sent the first FIN must respond with an ACK for this new FIN This rather complex procedure allows a graceful close ensuring that no data is lost during release of the connection 2 2 308631 14 20 Rev 00 Overview of IP Utilities TCP Features Because IP does not always guarantee reliable transfer of data TCP implements several reliability features to ensure that data arrives at its destination uncorrupted and in the order sent Table 2 1 describes these features Table 2 1 TCP Reliability Features Feature Description Sequence TCP assigns a sequence number to each data segment it numbers transmits The receiving host uses the sequence numbers to make sure that all the data arrives in order TCP assigns sequence numbers on a per octet basis so the value in this field is actually the sequence
136. hest precision When the local NTP client queries the remote time servers from the peer list the servers respond with various timestamps along with information about their clocks such as stratum precision and time reference The local NTP client reviews a list of responses from all the available servers and chooses one server as the best time source from which to synchronize its internal clock Nortel Networks recommends that you configure a minimum of three upper stratum remote time servers peers for a router because NTP can apply an agreement algorithm to detect a problem on any part of the time source You can if necessary add a maximum of five remote time servers on a device a router for example Configuring multiple remote time servers ensures redundancy in case one peer fails Using the BCC To specify the IP address of each peer that you want to add to the router navigate to the NTP prompt for example ntp and enter peer lt address gt address is 0 0 0 0 or any valid IP address For example the following command adds the peer 23 2 1 8 to the router ntp peer 23 2 1 8 peer 23 2 1 8 308631 14 20 Rev 00 7 5 Configuring IP Utilities Using Site Manager To specify the IP address of each NTP time server that you want to add complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens ch
137. hing at every NetBIOS interface configured on this router Select Disable if you want NetBIOS to treat names as 16 character entities 1 3 6 1 4 1 18 3 5 3 11 1 5 Create MIB Inst for Cached Name Configuration Manager gt Protocols gt IP gt NetBIOS gt Global Enable Enable Disable Enables or disables the ability of the system to e Create a MIB instance for each name entry stored in the name cache e Delete a MIB instance for each NetBIOS name entry that ages out of the name cache Select Disable if you want to release the system memory and processing resources otherwise dedicated to maintaining cached names in the MIB 1 3 6 1 4 1 18 3 5 3 11 1 6 A 22 308631 14 20 Rev 00 Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Site Manager Parameters Max Name Cache Entries Configuration Manager gt Protocols gt IP gt NetBIOS gt Global 100 1 to 2147483647 entries Specifies the maximum number of entries you need to provide in the NetBIOS name cache You can adjust the value of this parameter in direct proportion to the total number of server names expected to be active during intervals of peak traffic load or performance demand on the router A value of 100 is suitable for networks that include up to 100 NetBIOS names to cache 1 3 6 1 4 1 18 3 5 3 11 1 7 Name Cache Age Configu
138. his case a router that accepts time information from other remote time servers NTP System Implementation Model NTP is based on a hierarchical model that consists of a local NTP client which runs on the router and a number of remote time servers The NTP client sends requests for time information NTP messages to and receives time information from one or more remote time servers The local NTP client reviews the time information from all available time servers and synchronizes its internal clock to the time servers whose time is most accurate The NTP client does not forward time information to other devices running NTP 308631 14 20 Rev 00 2 15 Configuring IP Utilities There are two types of time servers in the NTP model primary time servers and secondary time servers A primary time server is directly synchronized to a primary reference source usually a wire or radio clock that is synchronized to a radio station that provides a standard time service The primary time server is the authoritative time source in the hierarchy meaning that it is the one true time source to which the other NTP devices in the subnet will synchronize their internal clocks A secondary time server synchronizes its time from a primary time server or from one or more secondary time servers to form a synchronization subnet see Figure 2 5 A synchronization subnet is a self organizing hierarchical master slave configuration with the primary servers at t
139. how the datagram should be handled The options are Normal and High Throughput High Throughput is the default Size in bytes of the windows used for FTP TCP connections The default is 16 000 bytes Number of successful FTP logins Number of FTP logins that failed Number of files successfully received Average transfer rate in kilobytes per second for receiving data Number of errors logged during inbound transfer Number of files successfully sent Average transfer rate in kilobytes per second for sending data Number of errors logged during outbound transfer The show ntp access command displays information about the Network Time Protocol NTP servers preferred accepted or restricted rejected by the local NTP client The output includes the following information IP Address IP Mask Filter Type IP address of this remote NTP server IP subnet mask for this remote NTP server e Restrict The local NTP client drops packets received from this remote NTP server e Prefer The local NTP client accepts packets received from this remote NTP server 308631 14 20 Rev 00 show ntp base BCC show Commands The show ntp base command displays the base record information for the NTP client running on the router The base record controls NTP on the router The output includes the following information NTP State Version Reference ID Stratum show ntp peers Actual dynamic state of the local NTP client
140. ical Solutions Centers Technical Solutions Center Telephone EMEA 33 4 92 966 968 North America 800 2LANWAN or 800 252 6926 Asia Pacific 61 2 9927 8800 China 800 810 5000 An Express Routing Code ERC is available for many Nortel Networks products and services When you use an ERC your call is routed to a technical support person who specializes in supporting that product or service To locate an ERC for your product or service go to the www12 nortelnetworks com URL and click ERC at the bottom of the page 308631 14 20 Rev 00 xxi Chapter 1 Starting IP Utilities This chapter describes how to create a basic TCP Transmission Control Protocol FTP File Transfer Protocol TFTP Trivial File Transfer Protocol Telnet NTP Network Time Protocol NetBIOS over IP or DNS Domain Name Service configuration by specifying values for required parameters only and accepting default values for all other parameters of these services This chapter contains the following information Topic Page Starting Configuration Tools 1 2 Configuring IP for Global Protocols 1 2 Verifying that IP Is Configured on a Router Interface 1 5 Starting TCP Services 1 5 Starting FTP Services 1 7 Starting TFTP Services 1 8 Starting Telnet Services i 9 Starting NTP Services 1 12 Starting NetBIOS over IP 1 13 Starting the DNS Client and Specifying Its First D
141. ies on DNS proxy for multidomain NAT fwd port lt integer gt Specifies the port that DNS forwarding server s are on The default is port 53 max answers truncated lt integer gt max cache size lt nteger gt Specifies the maximum number of answers from 1 to 100 to be returned by the requester The default is 1 answer Specifies the maximum number of cache entries from 1 to 100 that the DNS proxy allows to be stored on the router The default is 20 cache entries max queries allowed lt integer gt Specifies the maximum number of outstanding queries to the server from 1 to 100 that DNS proxy allows The default is 20 queries max retransmissions lt nteger gt Specifies the maximum number of times from 0 to 15 that the DNS proxy can retransmit a request to the DNS server before recording an error The default is 2 retransmissions mode lt passthrough nat translation gt Specifies whether the DNS proxy server is operating in standard pass through mode or in nat translation mode for Network Address Translation NAT The default is pass through port lt integer gt Specifies the UDP port that the DNS proxy server listens to on the interface on which DNS proxy is configured The default is port 53 timeout lt integer gt Specifies in seconds from 1 to 60 the amount of time that the DNS proxy server waits before it retransmits a request to the DNS server The default is
142. ing the IP Service By default the global IP access policy controls access for Telnet To specify the IP utility for which you want this policy to control access navigate to the policy specific prompt for example box ip access policy policy_1 and enter service lt service gt service is telnet default ftp tftp snmp ntp http For example the following command specifies FTP as the IP utility controlled by policy_1 access policy policy_1 service ftp access policy policy 1 C 2 308631 14 20 Rev 00 Configuring IP Global Access Policies Specifying the Policy Action By default the policy denies access to the IP utility that you specify see Specifying the IP Service on page C 2 To specify whether the IP global access policy that you created allows or denies access to the IP utility navigate to the policy specific prompt for example box ip access policy policy_1 and enter action lt action gt action is deny default allow For example the following command allows access to the service specified for policy_1 access policy policy_1 action allow access policy policy 1 Specifying the Precedence The precedence parameter specifies the precedence of this policy relative to other global IP access policies To set the precedence for a global IP access policy navigate to the policy specific prompt for example box ip access policy policy_1 and enter precedence lt precede
143. integer gt integer is the number of retries that FTP allows For example the following command line causes FTP to accept 10 login retries before rejecting logins ftp login retries 10 ftp Using Site Manager To specify an FTP login retry value complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose Global Protocols The Global Protocols menu opens 3 Choose FTP The FTP menu opens 4 Choose Global The Edit FTP Global Parameters window opens Set the Login Retries parameter Click on Help or see the parameter description on page A 5 Click on OK You return to the Configuration Manager window 308631 14 20 Rev 00 4 5 Configuring IP Utilities Specifying the Maximum FTP Idle Timeout The FTP idle time is the length of time in seconds that FTP waits before closing an idle FTP control connection You can set a value from 1 though 9999 By default FTP waits 900 seconds 15 minutes before closing an idle FTP control connection Using the BCC To specify a timeout interval navigate to the FTP prompt for example ip ftp and enter idle timeout lt nteger gt integer is the number of seconds FTP waits before timing out Note When specifying a maximum FTP idle timeout do not use a comma in the value For e
144. inued You do this 5 Set the Type of Service parameter Click on Help or see the parameter description on page A 6 System responds Click on OK You return to the Configuration Manager window Specifying the FTP Control Connection You can determine how the Internet transport layer handles datagrams on a control data connection by specifying the type of service value that FTP inserts in IP datagrams on a control connection To specify the type of service value use Site Manager to complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols Choose Global Protocols The Protocols menu opens The Global Protocols menu opens 3 Choose FTP The FTP menu opens 4 Choose Global The Edit FTP Global Parameters window opens Set the Control Connection parameter Click on Help or see the parameter description on page A 7 Click on OK You return to the Configuration Manager window 308631 14 20 Rev 00 Configuring IP Utilities Specifying a Data Transfer Value You can determine how the Internet transport layer handles datagrams on a data transfer connection by specifying a value that indicates the Type of Service that FTP inserts in IP datagrams on a data transfer connection You can use Site Manager to specify the type of service value that FTP inserts in
145. inutes that can elapse before the device disconnects the Telnet session if you fail to enter a command complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose Global Protocols The Global Protocols menu opens 3 Choose Telnet Server The Telnet Server menu opens 4 Choose Global The Telnet Server Global Parameters window opens 5 Set the Command Timeout min parameter Click on Help or see the parameter description on page A 12 6 Click on OK Site Manager saves your changes and exits the window Changing Login Retries By changing the login retries you can determine the maximum number of login attempts allowed before the device disconnects the Telnet session By default the device allows you three login attempts before it disconnects the Telnet session Using the BCC To change the maximum number of allowed login attempts enter login retries lt integer gt integer is a number from 1 to 99 login attempts For example the following command tells the device to allow 10 attempts before it disconnects the Telnet session server login retries 10 server 308631 14 20 Rev 00 6 15 Configuring IP Utilities Using Site Manager To specify the number of login attempts allowed before the device disconnects the Telnet session complete the following tasks Sit
146. iod expires the system disconnects Command line timeout value If you do not enter a command in this number of minutes the system disconnects Current state of the Telnet client enabled or disabled Character string used as the system prompt on the Telnet BCC console Remote port number for this Telnet connection IP address of the remote peer Remote port number for this Telnet connection IP address of the local peer Local port number for this Telnet connection D 8 308631 14 20 Rev 00 show tftp BCC show Commands The show tftp command displays information about the Trivial File Transfer Protocol TFTP status The output includes the following information TFTP Protocol Default Volume Retransmit Timeout Value sec Maximum Number of Retransmits Number of Writes Received Number of Reads Received Number of Retransmits Current state of the TFTP protocol enabled or disabled File system volume number to which transferred files will be written and from which they will be retrieved The volume number corresponds to the slot number on which the volume resides General retransmission timeout value in seconds Maximum number of retransmissions Number of write requests received Number of read requests received Number of retransmitted data packets 308631 14 20 Rev 00 D 9 Numbers 15 Character NetBIOS Name Caching parameter NetBIOS 8 3 A 22 A acronyms xix Answer
147. ion window opens 5 Set the Force User Logout parameter Click on Help or see the parameter description on page A 15 6 Click on OK Site Manager saves your changes and exits the window 6 6 308631 14 20 Rev 00 Customizing Telnet Services Customizing Telnet Server on the Router This section describes how to customize your Telnet server on the router as follows Topic Page Disabling and Reenabling a Telnet Server on the IP Router 6 7 Specifying the Maximum Number of Lines on the Console 6 9 Pausing Telnet Console Output 6 10 Changing the Telnet Login Prompt 6 11 Changing the Login Timeout 6 12 Changing the Password Timeout 6 13 Changing the Command Timeout 6 14 Changing Login Retries 6 15 Using Telnet Server Diagnostics 6 16 Changing the History File 6 19 Deleting Telnet Server from the Router 6 21 Disabling and Reenabling a Telnet Server on the IP Router You can enable or disable a Telnet server on the IP router By default Telnet is enabled for the IP router allowing you to establish Telnet sessions to the target router Using the BCC To disable a Telnet server navigate to the Telnet server prompt for example box telnet server and enter disable For example server disable server state state disabled 308631 14 20 Rev 00 6 7 Configuring IP Utilities To reenable a Telnet server on the IP router navigate to th
148. is configured You can however configure a different port number When the DNS proxy receives a valid request it forwards the packet to the DNS server on the proxy s list When the DNS proxy server receives a response from the DNS server the DNS proxy forwards the packet to the requesting client and stores the response in its local cache The DNS proxy lets you configure timeout intervals and the number of retransmissions allowed If the first DNS server contacted times out the DNS proxy tries the next server on the list and so on until it receives a response If all the servers time out the DNS proxy returns a serv_fail error to the client You can configure up to three DNS servers per proxy interface 308631 14 20 Rev 00 2 25 Configuring IP Utilities DNS responses can contain several answers to the client question although most DNS clients use only the first answer in the list Optionally you can configure the DNS proxy to truncate the number of answers returned to the client Any answers beyond the maximum are omitted from the DNS response message How the DNS Proxy Cache Works The DNS proxy caches DNS records to improve performance reduce network traffic and free the real DNS server from repetitive requests As with standard DNS entries expire based on the time to live TTL field in the DNS record You can configure the maximum number of cache entries The default is 20 When the DNS proxy receives a request it sear
149. ities Text Conventions This guide uses the following text conventions angle brackets lt gt bold text braces brackets ellipsis points Indicate that you choose the text to enter based on the description inside the brackets Do not type the brackets when entering the command Example If the command syntax is ping lt i p_address gt you enter ping 192 32 10 12 Indicates command names and options and text that you need to enter Example Enter show ip alerts routes Example Use the dinfo command Indicate required elements in syntax descriptions where there is more than one option You must choose only one of the options Do not type the braces when entering the command Example If the command syntax is show ip alerts routes you must enter either show ip alerts or show ip routes but not both Indicate optional elements in syntax descriptions Do not type the brackets when entering the command Example If the command syntax is show ip interfaces alerts you can enter either show ip interfaces or show ip interfaces alerts Indicate that you repeat the last element of the command as needed Example If the command syntax is ethernet 2 1 lt parameter gt lt value gt you enter ethernet 2 1 and as many parameter value pairs as needed xviii 308631 14 20 Rev 00 italic text screen text separator gt vertical line Acrony
150. k on Help or refer to page A 29 for a description of these parameters Click on OK Disabling the Recursion Bit You return to the Configuration Manager window If the first DNS server that the router contacts does not have the requested information you can set a recursion bit in the DNS information header packet This bit instructs that server to contact another server that can respond to the request The recursion bit is enabled by default If you do not want to contact more than one server you must disable the recursion bit 308631 14 20 Rev 00 Configuring IP Utilities Using the BCC To disable the recursion bit navigate to the DNS prompt and enter dns recursion disabled For example this series of commands disables recursion then checks the setting for recursion dns recursion disabled dns recursion recursion disabled dns To reenable the recursion bit navigate to the DNS prompt and enter dns recursion enabled dns Using Site Manager To disable the recursion bit complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols 2 Choose Global Protocols The Protocols menu opens The Global Protocols menu opens 3 Choose DNS The DNS menu opens 4 Choose Global The Edit DNS Global Parameters window opens Set the Recursion parameter to Disable Click
151. ling NTP 7 2 Setting the NTP Operation Mode 7 3 Configuring Remote Time Servers 7 5 Configuring NTP Access Control 7 13 Deleting NTP from the Router 7 15 308631 14 20 Rev 00 7 1 Configuring IP Utilities Configuring NTP Using the BCC or Site Manager Table 7 1 lists the NTP configuration tasks described in this chapter and indicates whether you can use the BCC or Site Manager to perform each task Table 7 1 NTP Configuration Tasks Task BCC Site Manager Disabling and Reenabling NTP v v Setting the NTP Operation Mode v Adding Remote Time Servers v v Setting the Mode for a Remote Time Server v v Setting Local Host Mode v Specifying the Source IP Address v v Specifying Peer Preference v v Deleting Remote Time Servers from a Router v v v Configuring NTP Access Control Disabling and Reenabling NTP By default NTP is enabled when you start it on the router You can disable and reenable NTP at any time Using the BCC To disable NTP services navigate to the NTP prompt for example box ntp and enter disable For example ntp disable ntp state state disabled To reenable NTP services navigate to the NTP prompt and enter enable 7 2 308631 14 20 Rev 00 Customizing NTP Services For example the following command reenables NTP on the router ntp enable ntp state state enabled Using Site Manager To disable or reen
152. lobal The Telnet Server Global Parameters window opens Set the TI Prompt parameter Click on Help or see the parameter description on page A 11 Click on OK Disconnects the current Telnet session 308631 14 20 Rev 00 6 11 Configuring IP Utilities Changing the Login Timeout You can specify a value that will determine the number of minutes that can elapse before the device disconnects the Telnet session if you fail to enter a login ID at the login prompt By default the device waits one minute before it disconnects the Telnet session if you fail to enter a login ID at the login prompt Using the BCC To specify the number of minutes that can elapse before the device disconnects the Telnet session if you fail to enter a login ID at the login prompt navigate to the server specific prompt and enter login timeout For example the following command causes the device to wait 15 minutes before it disconnects the Telnet session if you fail to enter a login ID at the login prompt server login timeout 15 server Using Site Manager To specify the number of minutes that can elapse before the device disconnects the Telnet session complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens Choose Global Protocols The Global Protocols menu opens 3 Choose Telnet
153. lose to any third party the Software or any information about the operation design performance or implementation of the Software and user manuals that is confidential to Nortel Networks and its licensors however Licensee may grant permission to its consultants subcontractors and agents to use the Software at Licensee s facility provided they have agreed to use the Software only in accordance with the terms of this license 3 Limited warranty Nortel Networks warrants each item of Software as delivered by Nortel Networks and properly installed and operated on Nortel Networks hardware or other equipment it is originally licensed for to function substantially as described in its accompanying user manual during its warranty period which begins on the date Software is first shipped to Licensee If any item of Software fails to so function during its warranty period as the sole remedy Nortel Networks will at its discretion provide a suitable fix patch or workaround for the problem that may be included in a future Software release Nortel Networks further warrants to Licensee that the media on which the Software is provided will be free from defects in materials and workmanship under normal use for a period of 90 days from the date Software is first shipped to Licensee Nortel Networks will replace defective media at no charge if it is returned to Nortel Networks during the warranty period along with proof of the date of shipment This warranty does
154. ls menu opens Choose Telnet Server The Telnet Server menu opens Choose Global The Telnet Server Global Parameters window opens 5 Set the Diagnostic Report parameter Click on Help or see the parameter description on page A 12 6 Click on OK Site Manager saves your changes and exits the window Enabling Diagnostic Exercise The Diagnostic Exercise parameter allows field personnel to enable exercise diagnostics on the Telnet server To enable exercise diagnostics on the Telnet server complete the following tasks You do this Site Manager Procedure System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose Global Protocols The Global Protocols menu opens Choose Telnet Server The Telnet Server menu opens Choose Global The Telnet Server Global Parameters window opens Click on Help or see the parameter description on page A 13 5 Set the Diagnostic Exercise parameter 6 Click on OK Site Manager saves your changes and exits the window 308631 14 20 Rev 00 6 17 Configuring IP Utilities Enabling Diagnostic Network Data The Diagnostic Network Data parameter allows you to specify whether you want the Technician Interface to display Telnet protocol information It is used for diagnostic purposes only by field service personnel To display Telnet protocol inf
155. ms Preface Indicates new terms book titles and variables in command syntax descriptions Where a variable is two or more words the words are connected by an underscore Example If the command syntax is show at lt valid_route gt valid_route is one variable and you substitute one value for it Indicates system output for example prompts and system messages Example Set Trap Monitor Filters Shows menu paths Example Protocols gt IP identifies the IP option on the Protocols menu Separates choices for command keywords and arguments Enter only one of the choices Do not type the vertical line when entering the command Example If the command syntax is show ip alerts routes you enter either show ip alerts or show ip routes but not both This guide uses the following acronyms ARP ATM BGP DARPA DLSw DNS Address Resolution Protocol asynchronous transfer mode Border Gateway Protocol Defense Advanced Research Projects Agency formerly ARPA data link switching Domain Name System 308631 14 20 Rev 00 xix Configuring IP Utilities DoD FIFO FTP GMT IEEE ILI IP MIB NetBIOS NTP PDU PVC SMDS SNAP SNMP SRM SVC TCP TCP IP TFTP TTL UDP WAN Department of Defense first in first out File Transfer Protocol Greenwich mean time Institute of Electrical and Electronic Engineers Intelligent Link Interface Internet Protocol management information base Network Ba
156. n Error Configuration Manager gt Protocols gt Global Protocols gt DNS gt Create DNS Client Enable Enable Disable Specifies whether the router should reject DNS server responses that contain the truncation bit in the DNS header Typically the information that the router uses is in the first few bytes of the response messages so it can ignore the rest of the message Accept the default Enable to ignore the error messages To accept truncation error messages set this parameter to Disable 1 3 6 1 4 1 18 3 5 3 19 1 9 Use Auth Answer Only Configuration Manager gt Protocols gt Global Protocols gt DNS gt Create DNS Client Disable Enable Disable Specifies whether the router should accept data only from the authorized server Select Enable to accept data only from an authorized server Select Disable to accept data from any server 1 3 6 1 4 1 18 3 5 3 19 1 10 Use Default Domain Name Configuration Manager gt Protocols gt Global Protocols gt DNS gt Create DNS Client Enable Enable Disable If you entered a value for the Domain Name parameter this parameter instructs the router to use that name when sending requests to a DNS server Accept the default Enable to use the default domain name Otherwise select Disable 1 3 6 1 4 1 18 3 5 3 19 1 11 A 32 308631 14 20 Rev 00 Site Manager Parameters DNS Server Parameters for DNS Client Parameter Path Default Options Func
157. n SIAE gusansai neaka sT 2 4 Table 2 3 FTF Conmands Supparted ci accctiedsctesie teed nesei aaaea Eai 2 9 Table 4 1 FTF TINS TASKS ousensia nnana beens etiam eames ENTNER 4 2 Table 6 1 Telnet Configuration TASKS 2 siciaissacicesicesiapssiosseraate adh iaia 6 2 Table 7 1 NTF COnkguiatan TASKS iarria in a NEE Ai 7 2 308631 14 20 Rev 00 xv Preface IP utilities are application protocols that use the Internet Protocol IP for message transport This guide describes the following IP utilities and what you do to start and customize them on a Nortel Networks router TCP FTP TFTP Telnet NTP NetBIOS over IP DNS and IP accounting You can use the Bay Command Console BCC or Site Manager to configure IP utilities on a router In this guide you will find instructions for using both the BCC and Site Manager Before You Begin Before using this guide you must complete the following procedures For a new router e Install the router see the installation guide that came with your router e Connect the router to the network and create a pilot configuration file see Quick Starting Routers Configuring BayStack Remote Access or Connecting ASN Routers to a Network Make sure that you are running the latest version of Nortel Networks BayRS and Site Manager software For information about upgrading BayRS and Site Manager see the upgrading guide for your version of BayRS 308631 14 20 Rev 00 xvii Configuring IP Util
158. n a Router Interface You can use the BCC or Site Manager to check whether IP has been configured on a router interface If IP is configured on at least one router interface IP is available on that router Using the BCC To check for IP on a router interface enter the show ip interfaces command to see a list of configured IP interfaces If there is at least one interface displayed then IP has been configured on that router For example box show ip interfaces Circuit Cet State IP Address Mask MAC Address E22 1 Up 21 1 1I 255 255 0 0 E23 2 Down 21 1142 255 255 0 0 Using Site Manager To check whether IP is configured on an interface using Site Manager click on the connector then click on Edit Circuit All configured protocols appear in the Protocols list Starting TCP Services You can use the BCC or Site Manager to start TCP on the router accepting default values for all parameters If you decide to change some or all of the default values see Chapter 3 Customizing TCP Services Before you begin verify that IP is configured on a router interface For instructions see Verifying that IP Is Configured on a Router Interface on page 1 5 If IP is not yet configured see Configuring IP for Global Protocols on page 1 2 for instructions 308631 14 20 Rev 00 1 5 Configuring IP Utilities Using the BCC To configure TCP on the router with default settings begin in configuration mode at the box or
159. nce gt precedence is an integer For example the following command sets the precedence of policy_1 to 5 access policy policy_1 precedence 5 access policy policy 1 308631 14 20 Rev 00 C 3 Configuring IP Utilities Specifying the Network to Which the Policy Applies You must specify the IP address or range of contiguous addresses to which the policy that you created applies Navigate to the policy specify prompt for example box ip access policy policy_1 and enter network lt ip_address ip_mask gt ip_address ip_mask is an address mask pair indicating the IP address or range of IP addresses to which this policy applies For example the following command specifies 192 32 150 0 255 255 255 0 as the address and mask to which policy_1 applies access policy policy_1 network 192 32 150 0 255 255 255 0 network policy_1 192 32 150 0 255 255 255 0 Disabling and Reenabling a Policy By default the access policy is enabled on the router To change the state of the global IP access policy that you created navigate to the policy specific prompt for example box ip access policy policy_1 and enter state lt state gt state is enabled default disabled For example the following command disables policy_1 access policy policy_1 state disabled access policy policy 1 C 4 308631 14 20 Rev 00 Configuring IP Global Access Policies Disabling and Reenabling Logging By default the IP global access
160. nector navigate to the top level box or stack prompt and enter lt interface_type gt slot lt s iot_number gt module lt module_number gt connector lt connector_number gt 1 2 308631 14 20 Rev 00 Starting IP Utilities e interface_type is the name of a link or net module on the router e slot_number is the number of the slot in which the link or net module is located e module_number is the net module number ASN and System 5000 routers only e connector_number is the number of a connector on the link or net module For example the following command configures an Ethernet interface on slot 2 connector 2 box ethernet slot 2 connector 2 ethernet 2 2 Step 2 Configure an IP Interface To configure an IP interface on a physical interface navigate to the prompt for the physical interface and enter ip address lt address gt mask lt mask gt address and mask are a valid IP address and its associated subnet mask expressed in either dotted decimal notation or in bit notation For bit notation use an integer from 1 to 32 that indicates the number of contiguous bits in the address For example if you specify 8 the mask is equivalent to 255 0 0 0 in dotted decimal notation if you specify 18 the mask is 255 255 192 0 The return prompt displays the dotted decimal equivalent For example the following command configures IP interface 2 2 2 2 255 0 0 0 on an Ethernet physical interface on sl
161. not apply if the media has been damaged as a result of accident misuse or abuse The Licensee assumes all responsibility for selection of the Software to achieve Licensee s intended results and for the installation use and results obtained from the Software Nortel Networks does not warrant a that the functions contained in the software will meet the Licensee s requirements b that the Software will operate in the hardware or software combinations that the Licensee may select c that the operation of the Software will be uninterrupted or error free or d that all defects in the operation of the Software will be corrected Nortel Networks is not obligated to remedy any Software defect that cannot be reproduced with the latest Software release These warranties do not apply to the Software if it has been i altered except by Nortel Networks or in accordance with its instructions ii used in conjunction with another vendor s product resulting in the defect or iii damaged by improper environment abuse misuse accident or negligence THE FOREGOING WARRANTIES AND LIMITATIONS ARE EXCLUSIVE REMEDIES AND ARE IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING WITHOUT LIMITATION ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE Licensee is responsible 308631 14 20 Rev 00 iii for the security of its own data and information and for maintaining adequate procedures apart from the Software to reconstruct lost or al
162. ns Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Site Manager Parameters TI Prompt Configuration Manager gt Protocols gt Global Protocols gt Telnet Server gt Global None 1 to 18 alphanumeric characters Specifies the character string used as the login prompt on the Telnet Technician Interface console screen Specify a character string Site Manager disconnects the current session if you modify the TI Prompt parameter 1 3 6 1 4 1 18 3 5 3 7 1 5 Login Timeout min Configuration Manager gt Protocols gt Global Protocols gt Telnet Server gt Global 1 1 to 99 minutes 99 infinity Specifies the number of minutes that can elapse before the Technician Interface disconnects the Telnet session if you do not enter a login ID at the login prompt Accept the default value 1 minute or specify a different value 1 3 6 1 4 1 18 3 5 3 7 1 6 Password Timeout min Configuration Manager gt Protocols gt Global Protocols gt Telnet Server gt Global 1 1 to 99 minutes 99 infinity Specifies the number of minutes that can elapse before the Technician Interface disconnects the Telnet session if you do not enter a password at the password prompt Accept the default value 1 minute or specify a different value 1 3 6 1 4 1 18 3 5 3 7 1 7
163. number of the first octet of the user data Out of order caching As TCP receives data segments it puts them in sequential order and forwards them to the receiving TCP client If TCP fails to receive one or more segments and cannot complete the sequential ordering it stores the remaining segments in cache memory for as long as the TCP connection exists When TCP receives the missing segments it takes the stored segments from cache memory puts them into sequential order with the newly received segments and then forwards them to the receiving TCP client Out of order caching ensures that data arrives in the correct order while saving bandwidth and retransmission time Checksums To ensure the integrity of the data the sending host adds a checksum to each segment it transmits The receiving host recalculates the checksum and if there is damage discards the segment Flow control Flow control allows the receiving host to regulate how much data is sent to it To activate flow control the receiving host advertises a window that indicates how much data it can accept When the transmit window is full the sending host must stop sending data until the receiving host can open the window again To control the rate of data transfer on your TCP connections you can specify the maximum window size allowed for each connection Acknowledgment TCP requires the receiving host to acknowledge that it has with retransmission received the data
164. o this System responds 5 Edit one or both of the following parameters e Ignore Truncation Error e Use Auth Answer Only Click on Help or see the parameter descriptions on page A 32 6 Click on OK You return to the Configuration Manager window Changing the DNS Server List for the DNS Client The DNS server list contains the DNS servers up to three that the DNS client can query You can display the list of servers add entries to the list and delete entries from it Displaying the DNS Server List for the DNS Client You can view the list of DNS servers to which the DNS client router can connect using either the BCC or Site Manager Using the BCC To view the list of all DNS servers to which the router can connect enter the following command at any BCC prompt box show dns server DNS Servers Server Address Port a eal ber Bea 53 2 2 gots Di2 53 3 ERE EE EEE 53 9 8 308631 14 20 Rev 00 Using Site Manager Customizing the DNS Client To view the list of DNS servers to which the router can connect complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose Global Protocols The Global Protocols menu opens 3 Choose DNS The DNS menu opens 4 Choose DNS Servers The DNS Server List window opens This window lists all configured DNS
165. ocols 2 Choose Global Protocols The Global Protocols menu opens 3 Choose Telnet Server The Telnet Server menu opens 4 Choose Global The Telnet Server Global Parameters window opens continued 308631 14 20 Rev 00 6 13 Configuring IP Utilities Site Manager Procedure continued You do this System responds 5 Set the Password Timeout min parameter Click on Help or see the parameter description on page A 11 6 Click on OK Site Manager saves your changes and exits the window Changing the Command Timeout By changing the command timeout you determine the number of minutes that can elapse before the Technician Interface disconnects the Telnet session if you do not enter a command at the command prompt By default the device waits 15 minutes before it disconnects the Telnet session if you fail to enter a command at the command prompt Using the BCC To specify the number of minutes that the device will wait before it disconnects the Telnet session navigate to the server specific prompt and enter command timeout lt integer gt integeris a number from 1 to 99 For example the following command causes the device to wait 35 minutes before it disconnects the Telnet session if you fail to enter a command at the command prompt server command timeout 35 server 6 14 308631 14 20 Rev 00 Customizing Telnet Services Using Site Manager To specify the number of m
166. ocols gt DNS gt DNS Proxy gt Add None Any valid IP address Specifies the third DNS server to forward requests to this domain Specify the address of the third DNS server for this domain in the DNS proxy server list If the value for Proxy Mode is set to NAT_Translation you must use an IP address that is in the domain specified in the Domain Name parameter 1 3 6 1 4 1 18 3 5 3 19 3 1 10 DNS Server Port Number Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Proxy gt Add 53 1 to 46000 Specifies the UDP port to which the DNS servers are connected In most cases accept the default Only in special situations should you specify another UDP port number 1 3 6 1 4 1 18 3 5 3 19 3 1 11 Timeout in seconds Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Proxy gt Add 5 1 to 60 Specifies in seconds the amount of time that the DNS proxy waits before it retransmits a request to the DNS server If you have a large network set this value higher than the default so that the router will not time out before it receives a response from the DNS server Otherwise accept the default 1 3 6 1 4 1 18 3 5 3 19 3 1 12 308631 14 20 Rev 00 A 37 Configuring IP Utilities Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Parameter Path
167. ollowing guidelines to configure the parameters in the NetBIOS IP Interface Table Parameters window Enable Disable Configuration Manager gt Protocols gt IP gt NetBIOS gt Interface Enable Enable Disable Enables or disables NetBIOS on this IP interface If NetBIOS has been configured and enabled on the router use this parameter to disable and reenable it on this interface as required 1 3 6 1 4 1 18 3 5 3 11 2 1 2 308631 14 20 Rev 00 A 25 Configuring IP Utilities Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID NetBIOS Name Caching Configuration Manager gt Protocols gt IP gt NetBIOS gt Interface Enable Enable Disable Enables or disables the ability of this interface to cache the name for each NetBIOS server active in the network Select Enable if you disabled server name caching previously and you want now to reenable that function Select Disable if you want to release system memory and processing resources otherwise dedicated to server name caching 1 3 6 1 4 1 18 3 5 3 11 2 1 8 Enable NetBIOS Inbound Broadcasts Configuration Manager gt Protocols gt IP gt NetBIOS gt Interface Enable Enable Disable Enables or disables inbound broadcasts on this interface If NetBIOS is configure
168. ols Choose Global Protocols The Protocols menu opens The Global Protocols menu opens 3 Choose NTP The NTP menu opens 4 Choose Global The Edit NTP Global Parameters window opens Set the Mode parameter Click on Help or see the parameter description on page A 18 Click on OK You return to the Configuration Manager window Configuring Remote Time Servers You configure remote time servers peers for time synchronization in unicast client mode only This section explains how to configure a remote time server as follows Topic Page Adding Remote Time Servers 73 Setting the Mode for a Remote Time Server 7 6 Setting Local Host Mode 7 8 Specifying the Source IP Address 7 8 Specifying Peer Preference 7 10 Deleting Remote Time Servers from a Router 7 12 308631 14 20 Rev 00 Customizing NTP Services Adding Remote Time Servers You add remote time servers to the router by specifying the IP address of each time server peer NTP adds the IP address of the time server to a peer list which the local NTP client uses when querying remote time servers for time information NTP queries all the remote time servers in the peer list for time information and then determines which time server to synchronize its internal clock to based on the following criteria e Lowest stratum e Closest in proximity to the primary time server e Claimed hig
169. omain lt state gt state is either enabled or disabled The default is enabled This parameter is valid only if you specified the domain name parameter hosts file lt path gt path is the name of or path to a file in flash memory that contains a list of default host name IP address pairs If you specify a host file the DNS client first checks whether the host name exists locally in the host file If not the DNS client sends an address resolution request to one of the configured DNS servers The larger the host file the slower the lookup For example the following commands change how the router sends DNS requests dns time out 10 dns max retransmissions 15 dns max outstanding queries 6 dns domain name hostb domain1 dns use default domain disabled dns hosts file lookhere 9 4 308631 14 20 Rev 00 Using Site Manager Customizing the DNS Client To modify how the router sends DNS requests complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose Global Protocols The Global Protocols menu opens 3 Choose DNS The DNS menu opens 4 Choose Global The Edit DNS Global Parameters window opens Edit one or more of the following parameters e Time Out e Max Retransmission e Max Outstanding Query e Domain Name e Use Default Domain Name Clic
170. omplete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens Choose Global Protocols The Global Protocols menu opens Choose DNS The DNS menu opens Choose DNS Proxy The DNS Proxy List window opens ay o h Edit one or more of the following parameters e DNS Server 1 e DNS Server 2 e DNS Server 3 Click on Help or refer to the parameter descriptions that begin on page A 36 6 Click on Apply 7 Click on Done You return to the Configuration Manager window Deleting DNS Proxy Services from a Router Interface You can delete DNS proxy services from a router interface using either the BCC or Site Manager Using the BCC To delete DNS proxy services from a router interface navigate to the DNS proxy prompt for example box ethernet 2 1 ip 68 33 2 54 8 dns proxy and enter the following command delete For example the following command deletes DNS proxy services from the router dns proxy 68 33 2 54 delete ip 68 33 2 54 255 0 0 0 10 8 308631 14 20 Rev 00 Customizing the DNS Proxy Using Site Manager To delete DNS proxy services from a router interface complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu open
171. on Instructions MIB Object ID Use the following guidelines to configure the parameters in the Edit NetBIOS IP Global Parameters window Enable Disable Configuration Manager gt Protocols gt IP gt NetBIOS gt Global Enable Enable Disable Enables or disables NetBIOS on this router If NetBIOS has been configured on this router use this parameter to disable and reenable it as required 1 3 6 1 4 1 18 3 5 3 11 1 2 308631 14 20 Rev 00 A 21 Configuring IP Utilities Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID NetBIOS Name Caching Configuration Manager gt Protocols gt IP gt NetBIOS gt Global Disable Enable Disable Globally enables or disables the ability of the router to cache the name associated with each NetBIOS server that is active on the network Select Enable to activate NetBIOS server name caching at every NetBIOS interface configured on the node 1 3 6 1 4 1 18 3 5 3 11 1 4 15 Character NetBIOS Name Caching Configuration Manager gt Protocols gt IP gt NetBIOS gt Global Disable Enable Disable Enables or disables the ability of the router to treat a NetBIOS name as either a 15 or a 16 character entity Select Enable to activate 15 character NetBIOS name cac
172. on a Router Interface on page 1 5 If IP is not yet configured see Configuring IP for Global Protocols on page 1 2 for instructions Using the BCC To configure Telnet on the router you must 1 Start a Telnet server 2 Start a Telnet client 308631 14 20 Rev 00 1 9 Configuring IP Utilities Step 1 Start a Telnet Server To start a Telnet server on the router with default settings begin in configuration mode at the box or stack prompt 1 Configure Telnet services box telnet telnet 2 Configure a Telnet server telnet server server 3 Display Telnet server default settings server info auto user script command timeout 15 force logout disabled history 20 lines 24 login retries 3 login timeout 1 manager script automgr bat more enabled password timeout 1 prompt state enabled Step 2 Start a Telnet Client To start a Telnet client on the router with default settings navigate to the Telnet prompt for example if you just configured a Telnet server enter the back command to get to the Telnet prompt 1 Configure a Telnet client telnet client client 2 Display Telnet client default settings client info debug log flag off prompt remote port 23 state enabled 308631 14 20 Rev 00 Starting IP Utilities Using Site Manager Before you can start Telnet services you must first start TCP for instructions see Starting TCP Services on page 1 5
173. oose Protocols 2 Choose Global Protocols The Global Protocols menu opens 3 Choose NTP The NTP menu opens 4 Choose Peers The NTP Peers Configuration List window opens 5 Click on Add The NTP Peer Configuration window opens 6 Set the peer IP Address parameter Click on Help or see the parameter descriptions on page A 18 7 Click on OK The NTP Peer Configuration List window opens displaying the IP address of the time server that you configured and default values for the NTP peer configuration parameters Setting the Mode for a Remote Time Server You can specify the mode in which a remote time server operates on the network However because NTP operates locally in client mode only all remote time servers known to the local NTP client are servers By default the mode is set to server indicating that the local NTP client adjusts its clock to the given remote time server but does not attempt to adjust the time server s clock You should accept the default value 7 6 308631 14 20 Rev 00 Using the BCC Customizing NTP Services To specify the mode in which a remote time server operates navigate to an NTP peer prompt for example ntp peer lt address gt and enter mode lt mode_type gt mode_type is either server or peer For example the following command sets the mode in which the remote server 61 32 5 7 will operate peer 61 32 5 7 mode server peer 61 32 5 7 info address 61
174. opens Set the Peer Preference parameter Click on Help or see the parameter descriptions on page A 21 Click on Apply When you select Yes the local NTP client prefers accepts NTP packets from the remote time server and synchronizes its internal clock to it When you select No the local NTP client rejects packets from the remote time server Click on Done You return to the Configuration Manager window 308631 14 20 Rev 00 Configuring IP Utilities Deleting Remote Time Servers from a Router When you delete a remote time server peer NTP deletes the IP address of that time server from the NTP peer list Using the BCC To delete a remote time server peer navigate to the peer specific prompt for example ntp peer lt address gt and enter delete For example the following command deletes the time server 34 66 92 5 peer 34 66 92 5 delete ntp Using Site Manager To delete one or more remote time servers from a router complete the following tasks Site Manager Procedure 1 You do this In the Configuration Manager window choose Protocols System responds The Protocols menu opens Choose Global Protocols The Global Protocols menu opens 3 Choose NTP The NTP menu opens 4 Choose Peers The NTP Peers Configuration List window opens Click on the IP address of the time server that you want to delete from the NTP peer li
175. orks recommends that you use broadcast client mode and multicast client mode when you have many clients on the network and only one remote time server as broadcasting reduces overall traffic volume on the network 308631 14 20 Rev 00 2 19 Configuring IP Utilities NetBIOS Overview The Network Basic Input Output System NetBIOS is a session layer communications service used by client and server applications in IBM token ring and PC LAN networks NetBIOS provides applications with a programming interface for sharing services and information across a variety of lower layer network protocols including IP Figure 2 7 shows the position of NetBIOS and IP in a simple network architecture Host A Host B Application H E dias layer SS Session NetBIOS esos NetBIOS layer Network iP layer E Lad E LAN WAN IP0032A Figure 2 7 NetBIOS over IP There are three categories of NetBIOS services the name service the session service and the datagram service The NetBIOS name service allows an application to e Verify that its own NetBIOS name is unique The application issues an add name query to NetBIOS NetBIOS broadcasts the add name query containing the name NetBIOS applications that receive the query return an add name response or a name in conflict response If no response to the query is received after typically six broadcasts the name is considered to be unique e Delete a
176. ormation complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose Global Protocols The Global Protocols menu opens 3 Choose Telnet Server The Telnet Server menu opens 4 Choose Global The Telnet Server Global Parameters window opens 5 Set the Diagnostic Network Data parameter Click on Help or see the parameter description on page A 13 6 Click on OK Site Manager saves your changes and exits the window Enabling Diagnostic PTY Data To specify whether you want the Technician Interface to display pseudo terminal driver PTY information complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose Global Protocols The Global Protocols menu opens 3 Choose Telnet Server The Telnet Server menu opens 4 Choose Global The Telnet Server Global Parameters window opens continued 6 18 308631 14 20 Rev 00 Customizing Telnet Services Site Manager Procedure continued You do this System responds 5 Set the Diagnostic PTY Data parameter Click on Help or see the parameter description on page A 13 6 Click on OK Site Manager saves your changes and exits the window Enabling Diagnostic O
177. ors whichever is applicable 6 Use of software in the European Community This provision applies to all Software acquired for use within the European Community If Licensee uses the Software within a country in the European Community the Software Directive enacted by the Council of European Communities Directive dated 14 May 1991 will apply to the examination of the Software to facilitate interoperability Licensee agrees to notify Nortel Networks of any such intended examination of the Software and may procure support and assistance from Nortel Networks 7 Term and termination This license is effective until terminated however all of the restrictions with respect to Nortel Networks copyright in the Software and user manuals will cease being effective at the date of expiration of the Nortel Networks copyright those restrictions relating to use and disclosure of Nortel Networks confidential information shall continue in effect Licensee may terminate this license at any time The license will automatically terminate if Licensee fails to comply with any of the terms and conditions of the license Upon termination for any reason Licensee will immediately destroy or return to Nortel Networks the Software user manuals and all copies Nortel Networks is not liable to Licensee for damages in any form solely by reason of the termination of this license 8 Export and re export Licensee agrees not to export directly or indirectly the Software o
178. ot 2 connector 2 ethernet 2 2 ip address 2 2 2 2 mask 255 0 0 0 ip 2 2 2 2 255 0 0 0 An IP interface is now configured on the Ethernet interface with default values for all interface parameters When you configure an IP interface the BCC also configures IP globally on the router with default values for all IP global parameters 308631 14 20 Rev 00 1 3 Configuring IP Utilities Using Site Manager Before you can select a protocol to run on the router you must configure a circuit that the protocol can use as an interface to an attached network For information and instructions see Configuring WAN Line Services and Configuring Ethernet FDDI and Token Ring Services When you have successfully configured the circuit the Select Protocols window opens Proceed as follows Site Manager Procedure You do this System responds 1 In the Select Protocols window select IP Then click on OK Set the following parameters e IP Address e Subnet Mask e Transmit Bcast Addr e UnNumbered Assoc Address Click on Help or see the parameter descriptions in Configuring IP ARP RARP RIP and OSPF Services The IP Configuration window opens Click on OK Click on Yes to enable TFTP Otherwise click on No Site Manager prompts you to enable TFTP on the router You return to the Configuration Manager window 308631 14 20 Rev 00 Starting IP Utilities Verifying that IP Is Configured o
179. ou customize FTP by modifying these parameters as described in the following sections Topic Page Configuring FTP Using the BCC or Site Manager 4 2 Disabling and Reenabling FTP 4 2 Specifying the FTP Default Volume 4 3 Specifying the Number of Login Retries 4 5 Specifying the Maximum FTP Idle Timeout 4 6 Specifying the Maximum Number of FTP Sessions 4 7 Specifying the Type of Service for Data Transmission 4 8 Specifying the FTP Control Connection 4 9 Specifying a Data Transfer Value 4 10 Specifying the TCP Window Size 4 10 Deleting FTP 4 12 308631 14 20 Rev 00 4 1 Configuring IP Utilities Configuring FTP Using the BCC or Site Manager Table 4 1 lists the FTP configuration tasks described in this chapter and indicates whether you can use the BCC or Site Manager to perform each task Table 4 1 FTP Configuration Tasks Task BCC Site Manager Disabling and Reenabling FTP Specifying the FTP Default Volume Specifying the Number of Login Retries Specifying the Maximum FTP Idle Timeout Specifying the Maximum Number of FTP Sessions SISISINIS Specifying the Type of Service for Data Transmission Specifying the FTP Control Connection Specifying a Data Transfer Value Specifying the TCP Window Size Deleting FTP Disabling and Reenabling FTP SISISISISISISISINIS After you configur
180. ou must specify 1 1 3 6 1 4 1 18 3 5 3 10 1 3 Login Retries Configuration Manager gt Protocols gt Global Protocols gt FTP gt Global 3 0 to 5 retries Specifies the number of FTP login retries allowed after a login failure Enter a value representing the number of login attempts that FTP will accept after a login failure before rejecting logins 1 3 6 1 4 1 18 3 5 3 10 1 4 308631 14 20 Rev 00 A 5 Configuring IP Utilities Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Idle Time Out secs Configuration Manager gt Protocols gt Global Protocols gt FTP gt Global 900 1 to 10000 seconds Specifies the length of time in seconds that FTP waits before closing an idle FTP control connection Determine the maximum idle time that you want to allow and specify the time value in seconds 1 3 6 1 4 1 18 3 5 3 10 1 5 Max Sessions Configuration Manager gt Protocols gt Global Protocols gt FTP gt Global 3 1 to 10000 sessions Specifies the maximum number of FTP sessions allowed at one time Determine the maximum number of simultaneous sessions that you want to allow and specify a value 1 3 6 1 4 1 18 3 5 3 10 1 6 Type of Service Configuration Manager gt Protocols gt Global Protocols gt
181. policy turns message logging on To turn message logging off and on for the policy that you created navigate to the policy specific prompt for example box ip access policy policy_1 and enter log lt state gt state is on default off For example the following command turns off logging for policy_1 access policy policy_1 log off access policy policy 1 Global IP Access Policy Example The following command sequence creates a global access policy called no telnet ip access policy polname no telnet access policy no telnet network 192 32 150 0 255 255 255 0 network no telnet 192 32 150 0 255 255 255 0 info address 192 32 150 0 mask 255 255 255 0 state enabled network no telnet 192 32 150 0 255 255 255 0 back access policy no telnet info action deny log on service telnet precedence 0 polname no telnet state enabled access policy no telnet 308631 14 20 Rev 00 C 5 Appendix D BCC show Commands To display configuration and statistical data about DNS FTP NTP TCP Telnet and TFTP from the management information base MIB use the BCC show command This appendix includes descriptions of the following show commands Command Page show dns server D 2 show dns stats D 3 show ftp D 3 show ntp access D 4 show ntp base D 5 show ntp peers D 5 show nip stats D 6 show tcp connections D 6 show tcp stats D 7 show telnet D 8 show tftp D 9 308631
182. ptions To specify whether you want the Technician Interface to display information on Telnet diagnostic options complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose Global Protocols The Global Protocols menu opens 3 Choose Telnet Server The Telnet Server menu opens 4 Choose Global The Telnet Server Global Parameters window opens 5 Set the Diagnostic Options parameter Click on Help or see the parameter description on page A 14 6 Click on OK Site Manager saves your changes and exits the window Changing the History File You can determine the maximum number of commands you want stored in the local command history table The table stores each command you enter at the device prompt on a first in first out FIFO basis By default the number of commands that the router stores in the local command history table is 20 308631 14 20 Rev 00 6 19 Configuring IP Utilities Using the BCC To set the maximum number of commands that you want the router to store in the history table navigate to the server prompt and enter hist lt integer gt integer is a number from 1 to 40 For example the following command sets the maximum number of commands that the router stores in the history table to 35 server hist 35 server Using Site Manager To specify the
183. r 3 The second and third DNS server addresses are optional Click on Help or see the parameter descriptions beginning on page A 33 7 Click on OK You return to the DNS Proxy List window the upper left corner diplays a list of configured interfaces for DNS proxy 8 Click on Apply and then click on Done You return to the Configuration Manager window 308631 14 20 Rev 00 Chapter 2 Overview of IP Utilities This chapter describes the concepts behind TCP FTP TFTP Telnet NTP DNS and NetBIOS over IP services and how Nortel Networks routers implement them You can use this information to decide how to customize TCP FTP TFTP Telnet NTP DNS and NetBIOS over IP parameters for your configuration Topic Page TCP Overview eal FTP Overview 2 7 TFTP Overview 2 10 Telnet Overview 2 11 NTP Overview 2 15 NetBIOS Overview 2 20 DNS Overview 2 24 TCP Overview In the 1970s the Defense Advanced Research Projects Agency DARPA of the U S Department of Defense DOD developed the Transmission Control Protocol TCP to provide communication among hosts manufactured by different vendors DARPA designed TCP to work within a layered hierarchy of networking protocols using the Internet Protocol IP to transfer data Built upon the IP layer suite TCP is a connection oriented end to end protocol that provides the packet sequencing error control and other services required to provide reli
184. r description on page A 8 6 Click on OK You return to the Configuration Manager window Specifying a Close Timeout Value You can specify the number of seconds that TFTP waits after it has successfully retrieved a file to make sure that the sender has received the last acknowledgment By default TFTP waits 25 seconds Using the BCC To specify a close timeout value navigate to the TFTP prompt and enter close timeout lt integer gt integer is any number of seconds For example the following command causes TFTP to wait 15 seconds to make sure that the sender has received the last acknowledgment tftp close timeout 15 titp 308631 14 20 Rev 00 5 5 Configuring IP Utilities Using Site Manager To specify a close timeout value complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose IP The IP menu opens 3 Choose TFTP The TFTP menu opens 4 Choose Edit TFTP Parameters The Edit TFTP Parameters window opens Set the Close Time Out parameter Click on Help or see the parameter description on page A 9 Click on OK You return to the Configuration Manager window Specifying the Number of Retransmissions Using the BCC retry count lt integer gt tftp retry count 10 tftp You can specify the number of
185. r preference for a remote time server by turning on peer preference This means that the local NTP client prefers accepts packets from the remote server and synchronizes its internal clock to this server Using the BCC To specify that the local NTP client will acept or reject NTP packets from the remote time server navigate to an NTP peer prompt for example ntp peer lt address gt and enter peer preference lt state gt state is either enabled or disabled For example this command specifies that the local NTP client rejects NTP packets from the remote server 21 1 1 9 peer 21 1 1 9 peer preference disabled peer 21 1 1 9 In this example the command specifies that the local NTP client accepts NTP packets from the remote server 21 1 1 9 peer 21 1 1 9 peer preference enabled peer 21 1 1 9 7 10 308631 14 20 Rev 00 Using Site Manager Customizing NTP Services To specify whether the local NTP client will prefer or reject NTP packets from the remote time server complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose Global Protocols The Global Protocols menu opens 3 Choose NTP The NTP menu opens Choose Peers Click on the IP address of the time server displayed in the NTP peer list in the upper left The NTP Peers Configuration List window
186. r related technical data or information without first obtaining any required export licenses or other governmental approvals Without limiting the foregoing Licensee on behalf of itself and its subsidiaries and affiliates agrees that it will not without first obtaining all export licenses and approvals required by the U S Government i export re export transfer or divert any such Software or technical data or any direct product thereof to any country to which such exports or re exports are restricted or embargoed under United States export control laws and regulations or to any national or resident of such restricted or embargoed countries or ii provide the Software or related technical data or information to any military end user or for any military end use including the design development or production of any chemical nuclear or biological weapons 9 General If any provision of this Agreement is held to be invalid or unenforceable by a court of competent jurisdiction the remainder of the provisions of this Agreement shall remain in full force and effect This Agreement will be governed by the laws of the state of California Should you have any questions concerning this Agreement contact Nortel Networks 4401 Great America Parkway PO Box 58185 Santa Clara California 95054 8185 LICENSEE ACKNOWLEDGES THAT LICENSEE HAS READ THIS AGREEMENT UNDERSTANDS IT AND AGREES TO BE BOUND BY ITS TERMS AND CONDITIONS LICENSEE FURTHER AGR
187. rameters in the Edit Telnet Client Global Parameters window Enable Disable Configuration Manager gt Protocols gt Global Protocols gt Telnet Client gt Global Enable None Specifies whether the Telnet client is enabled for the IP router allowing you to establish outbound Telnet sessions from the Technician Interface to another router or to a UNIX station that supports Telnet Select Enable to enable the Telnet client for the IP router or Disable to disable it 1 3 6 1 4 1 18 3 5 3 7 2 2 Verbose Debug Logging Configuration Manager gt Protocols gt Global Protocols gt Telnet Client gt Global OFF ON OFF Specifies whether the Technician Interface displays the negotiation process between the Telnet server and Telnet client This parameter is for diagnostic use only Select ON to enable verbose debug logging or OFF to disable it 1 3 6 1 4 1 18 3 5 3 7 2 3 A 16 308631 14 20 Rev 00 Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Site Manager Parameters Remote Port Configuration Manager gt Protocols gt Global Protocols gt Telnet Client gt Global 23 Any valid TCP port number Specifies the default remote Telnet server s TCP port Enter the appropriate value for the default remote Telnet server s TCP port 1 3 6 1 4 1 18 3 5 3 7 2 4 Prompt Configuration Manager gt Protocols g
188. ration Manager gt Protocols gt IP gt NetBIOS gt Global 300 Any value in seconds that can rapidly age infrequently referenced names out of the NetBIOS name cache Specifies an age in seconds when inactive NetBIOS names expire from the NetBIOS name cache Choose an aging value that allows infrequently referenced or obsolete server names to expire from the name cache The smaller the value the less efficient broadcast reduction is but the more quickly the network recovers topology changes 1 3 6 1 4 1 18 3 5 3 11 1 9 308631 14 20 Rev 00 A 23 Configuring IP Utilities Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Hash Entry Count Configuration Manager gt Protocols gt IP gt NetBIOS gt Global 253 Any integer value Specifies the number of entries you want to allow in the cache lookup tables Each NetBIOS interface has a local table to store and retrieve the names of NetBIOS servers active on the network For networks that actively use up to 2500 NetBIOS server names use the default value 253 To determine a hash entry count for larger networks divide the total number of unique NetBIOS server names active in the network by 10 adjust the quotient to the nearest higher or lower prime number and replace the default value with the new calculated number Increasing the number of hash table
189. rface 8 14 Deleting NetBIOS from the Router 8 16 308631 14 20 Rev 00 8 1 Configuring IP Utilities Disabling and Reenabling NetBIOS on the Router When you start NetBIOS on the router NetBIOS is automatically enabled To disable or reenable NetBIOS over IP complete the following tasks using Site Manager Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens Choose Protocols 2 Choose IP The IP menu opens 3 Choose NetBIOS The NetBIOS menu opens 4 Choose Global The Edit NetBIOS IP Global Parameters window opens 5 Set the Enable Disable parameter Click on Help or see the parameter description on page A 21 6 Click on OK You return to the Configuration Manager window Configuring a NetBIOS Cache NetBIOS is a broadcast intensive protocol Much of the broadcast overhead is related to maintaining unique names across the network and providing end users with access to NetBIOS applications The amount of overhead grows with the number of NetBIOS resources applications servers and clients on the network To keep broadcast traffic to a minimum each router that runs NetBIOS over IP builds and maintains a cache of NetBIOS name IP address pairs using information contained in the name query responses it receives and forwards Routers that support NetBIOS must analyze each name query request received on a NetBI
190. roceeds during its lifetime Table 2 2 TCP Connection States State Definition LISTEN 2 TCP listens for a connection request from any remote TCP SYN SENT 3 TCP has sent a connection request SYN segment and waits for a matching connection request and acknowledgment from the remote TCP SYNRECEIVED 4 TCP has sent a connection request received a matching request and waits for a confirming connection request acknowledgment from the remote TCP ESTABLISHED 5 Connection open Data can be received and sent This is the normal state for the data transfer phase of the connection FINWAIT 1 6 TCP waits for a connection termination request FIN segment from the remote TCP or for an acknowledgment of a previously sent connection termination request continued 2 4 308631 14 20 Rev 00 Overview of IP Utilities Table 2 2 TCP Connection States continued State Definition FINWAIT 2 7 TCP waits for a connection termination request from the remote TCP CLOSEWAIT 8 TCP waits for a connection termination request from the client CLOSING 10 TCP waits for a connection termination request acknowledgment from the remote TCP LASTACK 9 TCP waits for acknowledgment of the connection termination request previously sent to the remote TCP TIMEWAIT 11 TCP waits for enough time to pass to ensure that the remote TCP received the acknowledgment of its connection termination reque
191. rotocols menu opens 3 Choose NTP The NTP menu opens 4 Choose Peers The NTP Peers Configuration List window opens 5 Click on the IP address of the time server in the NTP Peer list 6 Set the Local Host Mode parameter Click on Help or see the parameter descriptions on page A 20 7 Click on Apply Site Manager sets the mode to Client Nortel Networks supports only the Client option 8 Click on Done You return to the Configuration Manager window Specifying the Source IP Address The source IP address allows you to specify a single IP address that NTP uses to override the source address of the IP interface from which the NTP packet is transmitted Use this parameter when you want the remote time server to filter NTP timestamps for the local NTP client based on IP source address You might also want to specify a source IP address when you have enabled security features on a time server and you want to restrict access to it By default the source IP address is 0 0 0 0 You should use a circuitless IP address as the source IP address 308631 14 20 Rev 00 Using the BCC Customizing NTP Services To specify a source IP address that overrides the source address of the IP interface from which the NTP packet is transmitted navigate to an NTP peer prompt for example ntp peer lt address gt and enter src ip address lt address gt For example the following command causes NTP to use the sour
192. router Increasing the number of entries in the hash table e Decreases the number of names the router must compare before finding a specific cached name e Decreases the amount of time the router takes to find a particular cached name Increases memory usage 8 6 308631 14 20 Rev 00 Customizing NetBIOS over IP For networks that actively use up to 2500 NetBIOS server names use the default value 253 To determine a hash entry count for larger networks e Divide the total number of unique NetBIOS server names active in the network by 10 e Adjust the quotient to the nearest higher or lower prime number A prime number can only be divided by itself or by 1 and still yield a whole number quotient e Replace the default value with the new calculated number Increasing the number of hash table entries does not increase the number of names that a router can cache With larger networks increasing the size of the hash tables may however reduce internal cache lookup time thereby improving overall performance To specify the number of entries you want to allow in the cache lookup tables complete the following tasks using Site Manager Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose IP The IP menu opens 3 Choose NetBIOS The NetBIOS menu opens 4 Choose Global The Edi
193. rs 5 Any number of seconds Specifies the number of seconds that TFTP waits for an acknowledgment before retransmitting the last packet Specify the appropriate number of seconds 1 3 6 1 4 1 18 3 5 3 6 4 A 8 308631 14 20 Rev 00 Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Site Manager Parameters Close Time Out Configuration Manager gt Protocols gt IP gt TFTP gt Edit TFTP Parameters 25 Any number of seconds Specifies the number of seconds that TFTP waits after it has successfully received a file to make sure that the sender has received the last acknowledgment Specify the appropriate number of seconds 1 3 6 1 4 1 18 3 5 3 6 5 Retransmit Configuration Manager gt Protocols gt IP gt TFTP gt Edit TFTP Parameters 5 Any number of retransmissions Specifies the number of times that TFTP retransmits an unacknowledged message before abandoning the transfer attempt Specify the number of retransmissions 1 3 6 1 4 1 18 3 5 3 6 6 Telnet Server Global Parameters Parameter Path Default Options Function Instructions MIB Object ID Use the following guidelines to configure the Telnet server global parameters in the Edit Telnet Server Global Parameters window Enable Disable Configuration Manager gt Protocols gt Global Protocols gt Telnet Server gt Global
194. s Choose Global Protocols The Global Protocols menu opens Choose DNS The DNS menu opens Choose DNS Proxy The DNS Proxy List window opens a R o r Click on the DNS proxy server interface that you want to delete from the list in the upper left corner and click on Delete Site Manager clears all entries related to this DNS proxy server Caution Unlike as with DNS client you will NOT be prompted to confirm your deletion of the DNS proxy interface Click on Done You return to the Configuration Manager window 308631 14 20 Rev 00 10 9 Appendix A Site Manager Parameters This appendix contains the Site Manager parameter descriptions for TCP FTP TFTP Telnet NTP DNS NetBIOS and IP accounting You can display the same information using Site Manager online Help Topic Page TCP Global Parameters A 3 FTP Global Parameters A 5 TFTP Parameters A 8 Telnet Server Global Parameters A 9 Telnet Client Global Parameters A 16 NTP Parameters A 17 NetBIOS Global Parameters A 21 NetBIOS IP Interface Table Parameters A 25 NetBIOS IP Static Entry Table Parameters A 27 DNS Client Parameters A 29 DNS Server Parameters for DNS Client A 33 DNS Proxy Parameters A 34 IP Accounting Parameters A 40 308631 14 20 Rev 00 A 1 Configuring IP Utilities For each parameter this appendix provides the following in
195. s parameter Click on Help or see the parameter description on page A 4 System responds 6 Click on OK You return to the Configuration Manager window Deleting TCP You can delete TCP from the router using the BCC or Site Manager Using the BCC To delete TCP from the router navigate to the TCP prompt for example ip tep and enter delete For example the following command deletes TCP from the router tcp delete ip Using Site Manager To delete TCP from the router complete the following tasks Site Manager Procedure You do this System responds choose Protocols 1 In the Configuration Manager window The Protocols menu opens 2 Choose Global Protocols The Global Protocols menu opens 3 Choose TCP The TCP menu opens 4 Choose Delete TCP A message box prompts Do you REALLY want to delete TCP 5 Click on OK You return to the Configuration Manager window 308631 14 20 Rev 00 Chapter 4 Customizing FTP Services This chapter describes how to customize FTP services on the router It assumes that you have configured IP on an interface and started FTP using the default parameters as described in Chapter 1 Starting IP Utilities and that you understand the FTP concepts described in Chapter 2 Overview of IP Utilities After you start FTP on the router FTP default values are in effect for all FTP parameters Y
196. s retransmitted Number of queues that internally timed out Number of queries returned with an error Number of local errors The show ftp command displays configuration and statistical information about the File Transfer Protocol FTP service The output includes the following information Default Volume Idle Timeout Max Sessions Max Login Retries Transfer Type File system volume to which transferred files are written and from which they are retrieved The volume number corresponds to the slot number on which the volume resides Timeout in seconds to close the FTP control connection if the connection remains idle The default is 900 seconds 15 minutes Maximum number of FTP sessions allowed at one time The default is three sessions Maximum number of FTP login retries allowed after a login failure The default is three retries File transfer type ASCII or Binary 308631 14 20 Rev 00 Configuring IP Utilities Control Type Data Type TCP Window Size Logins Logins Failed Files Received Average In Kb s In Errors Files Sent Avg Out Kb s Out Errors show ntp access Type of service ToS value set for control connection in the IP datagram that specifies to the transport layer how the datagram should be handled The options are Normal and Low Delay Low Delay is the default Type of service ToS value set for data transfer in the IP datagram that specifies to the transport layer
197. server In this way name query requests will traverse the unnumbered interfaces as unicast IP packets DNS Overview The Domain Name Service DNS is a distributed database system with DNS clients requesting host name address resolution information from various DNS servers DNS is used with numerous types of networking applications and protocols Specifically DNS provides a directory service that allows client devices to retrieve information from a server based database For the Internet DNS enables a device to obtain the IP address of a host based on the host s domain name The Nortel Networks router can function as a DNS client or as a DNS proxy server DNS Proxy Server The DNS proxy server is a system solution that lets the router act as a DNS server DNS clients can configure an IP interface on the router as their DNS server The DNS proxy server on the router has a list of DNS servers to contact on behalf of the client Using the DNS proxy server feature a network administrator can statically configure hosts to use the IP address of the DNS proxy server on the router If the DNS servers change or physically move the administrator has to change only the list of DNS servers on the router rather than having to make the change on each individual client 2 24 308631 14 20 Rev 00 Overview of IP Utilities How the DNS Proxy Server Works Clients on a LAN typically use DNS servers to resolve a host name to an IP address
198. seven remote time servers When you set the Filter Type to Prefer the local NTP client accepts packets received from remote time servers The IP Mask parameter allows you to specify an IP subnet mask address to filter NTP timestamps based on a source subnet 7 14 308631 14 20 Rev 00 Using Site Manager Customizing NTP Services To specify whether to drop or accept NTP timestamps destined for a local NTP client complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose Global Protocols The Global Protocols menu opens 3 Choose NTP The NTP menu opens 4 Choose Access The NTP Access Configuration List window opens displaying the IP address of each time server 5 Click on the IP address of the time server whose access you want to restrict 6 Set the following parameters e Filter Type e IP Mask Click on Help or see the parameter descriptions on page A 19 The Filter Type Selection box opens 7 Click on Apply 8 Click on Done You return to the Configuration Manager window Deleting NTP from the Router You can delete NTP service from the router using the BCC or Site Manager Using the BCC To delete NTP from the router navigate to the NTP prompt for example ntp and enter delete For example ntp delete box
199. sic Input Output System Network Time Protocol protocol data unit permanent virtual circuit Switched Multimegabit Data Service Subnetwork Access Protocol Simple Network Management Protocol System Resource Module switched virtual circuit Transmission Control Protocol Transmission Control Protocol Internet Protocol Trivial File Transfer Protocol time to live User Datagram Protocol wide area network XX 308631 14 20 Rev 00 Preface Hard Copy Technical Manuals You can print selected technical manuals and release notes free directly from the Internet Go to the support baynetworks com library tpubs URL Find the product for which you need documentation Then locate the specific category and model or version for your hardware or software product Use Adobe Acrobat Reader to open the manuals and release notes search for the sections you need and print them on most standard printers Go to Adobe Systems at www adobe com to download a free copy of Acrobat Reader You can purchase selected documentation sets CDs and technical publications through the Internet at the www1 fatbrain com documentation nortel URL How to Get Help If you purchased a service contract for your Nortel Networks product from a distributor or authorized reseller contact the technical support staff for that distributor or reseller for assistance If you purchased a Nortel Networks service program contact one of the following Nortel Networks Techn
200. smitting unacknowledged data Using the BCC By default the router sets the minimum retransmission timeout value to 250 milliseconds ms To specify a value for the minimum retransmission timeout navigate to the TCP prompt for example ip tep and enter min rto lt integer gt integer is a value from 100 to 15 000 milliseconds ms Note When specifying a minimum retransmission timeout value do not use a comma in the value For example the following command sets the value for the minimum retransmission timeout to 300 ms tcp min rto 300 tcp 308631 14 20 Rev 00 3 3 Configuring IP Utilities Using Site Manager To specify a value for the minimum retransmission timeout complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols Choose Global Protocols The Global Protocols menu opens 3 Choose TCP The TCP menu opens 4 Choose Global The Edit TCP Global Parameters window opens 5 Set the Min Retransmission Timeout msec parameter Click on Help or see the parameter description on page A 3 6 Click on OK You return to the Configuration Manager window Setting the Maximum Retransmission Timeout You can specify a maximum value for the retransmission timeout When one side of a TCP connection sends a frame and does not receive an acknowledgment from
201. splays information about the TCP configuration The output includes the following information State Timeout Minimum Timeout Maximum Maximum Window Size Timeout Algorithm Active Opens Passive Opens Number of Segments Received Number of Segments Sent Number of Segments Retransmitted Current state of TCP Possible values are up 1 down 2 init 3 and not present 4 Minimum value in milliseconds permitted for the retransmission timeout When one side of a TCP connection sends a frame and the other side of the connection does not acknowledge the transmission within the timeout period the sending station retransmits the frame Maximum value in milliseconds permitted for the retransmission timeout When one side of a TCP connection sends a frame and the other side of the connection does not acknowledge the transmission within the timeout period the sending station retransmits the frame Maximum transmit and receive window size that TCP allows for each connection Algorithm for determining when to retransmit unacknowledged packets Nortel Networks implements the Van Jacobson algorithm only Number of times that TCP connections have made a direct transition to the SYN SENT state from the CLOSED state Number of times that TCP connections have made a direct transition to the SYN RCVD state from the LISTEN state Total number of segments received including those received in error This count inclu
202. ss of a DNS server entry from the DNS proxy server list using the BCC or Site Manager Using the BCC To change the IP address of an entry from the DNS proxy list of DNS forwarding servers navigate to the dns proxy prompt for the interface for which you want to delete a fowarding server address for example box ethernet 2 1 ip 192 1 34 67 8 dns proxy and enter fwd server lt integer gt address lt P_address gt integer identifies the server number whether 1 2 or 3 IP_address is the IP address of the DNS server A value of 0 0 0 0 means that no DNS server is specified For example for the DNS proxy interface at IP address 192 1 34 67 the fwd server3 address 75 202 93 11 command changes the address of the third DNS server from 75 33 16 28 to 75 202 93 11 in the list of forwarding servers dns proxy 192 1 34 67 info answer truncation disabled domain name fwd port 53 fwd serverl address 32 97 4 126 fwd server2 address 88 117 63 45 fwd server3 address 75 33 16 28 max answers truncated 1 max cache size 20 max queries allowed 20 max retransmissions 2 mode pass through port 53 state enabled timeout 5 dns proxy 192 1 34 67 fwd server3 address 75 202 93 11 dns proxy 192 1 34 67 fwd server3 address fwd server3 address 75 202 93 11 dns proxy 192 1 34 67 308631 14 20 Rev 00 10 7 Configuring IP Utilities Using Site Manager To change the IP address of an entry from the DNS proxy list of DNS forwarding servers c
203. ss translation This parameter is configurable only when the value for Proxy Mode is set to NAT_ Translation 1 3 6 1 4 1 18 3 5 3 19 3 1 7 DNS Server 1 Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Proxy gt Add None Any valid IP address Specifies the first DNS server to forward requests to this domain Specify the address of the first DNS server for this domain in the DNS proxy server list If the value for Proxy Mode is set to NAT_Translation you must use an IP address that is in the domain specified in the Domain Name parameter 1 3 6 1 4 1 18 3 5 3 19 3 1 8 DNS Server 2 Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Proxy gt Add None Any valid IP address Specifies the second DNS server to forward requests to this domain Specify the address of the second DNS server for this domain in the DNS proxy server list If the value for Proxy Mode is set to NAT_Translation you must use an IP address that is in the domain specified in the Domain Name parameter 1 3 6 1 4 1 18 3 5 3 19 3 1 9 A 36 308631 14 20 Rev 00 Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Site Manager Parameters DNS Server 3 Configuration Manager gt Protocols gt Global Prot
204. sseessssssensssnrsesrsrenneennssrnneennees A 27 Bikien e 2 epee E T E E T EET A 29 DNS Server Parameters for DNS Client Pheeesiaas pecetouaate er E A 33 DNS Proxy Paracas ancien ania iat OA IP Accounting Parameters sni piian P A E stigeenieanbenie A 40 Appendix B Configuring IP Accounting on a Frame Relay Interface Enabling IP Accounting on the OUTS ae ciscic sce ccceescctee ch ssccsesenavateorcsadnces cunts nnna B 2 Specifying the Maximum Size of the IP Accounting Table 000 ee Menuiasstaat B 3 Controlling Notification of a Full IP Accounting Table cccccceeeseeeeeeeeeeeeeeeeeeeeetenees B 3 Copying the IP Accounting Table to the Checkpoint Table cccecceeeeeeseteeeeeeeees B 4 x 308631 14 20 Rev 00 Appendix C Configuring IP Global Access Policies Creating and Naming the Polig sccasssececsisteesacctjicehicacavesstsinncentaiteosesradanetesiccermecamioens C 2 Speci tie IP Omnis ra NAE beni C 2 SCI me Poley ACION ssxacectenssesnctetecucxcsatecuaneneissl a eae heal a inia C 3 Sec ing Wie Preca den E i gece aired eel eit dare area eer aaleaty C 3 Specifying the Network to Which the Policy PUSS cet tabs soaks E a senna C 4 Disabling and Reenabling a POUGY ccccsssacoseescercasresssooemasyccrenmeececcdwesseceneiacsccucemeedecbeases C 4 Disabling and Reenabling Logging visiestenimwinienniannueitinn inne eaiennimes C 5 Global IP Access Polley Example nineio aiae iaaa a a aE C 5 Appen
205. st CLOSED 1 No connection TCP Memory Considerations The Transmission Control Protocol requires a significant amount of memory to e Retain copies of outbound data in case they must be retransmitted e Retain copies of inbound data in case they are received out of order and must be rearranged e Manage the TCP connections The amount of memory used per TCP connection is dynamic Each connection uses a small amount of overhead memory less than 1 KB even if the connection is idle As the size of the transmit and receive window increases so does the memory for connections It expands as much as TCP allows You can control the window size by setting a value for the Max Window Size parameter For information on the Window Size parameter in the Edit TCP Global Parameters window see Chapter 3 Customizing TCP Services The maximum amount of memory TCP can use for a connection is equal to the overhead memory plus twice the window size because the window can fill in both directions 308631 14 20 Rev 00 2 5 Configuring IP Utilities The value you set for the maximum window size depends on how much memory you need for services other than TCP If you have a complicated configuration specify a low Max Window Size value for TCP connections since space is limited Systems with less involved configurations can support more TCP connections and a higher maximum window size value If TCP consumes too much memory on th
206. st in the upper left Click on Delete The IP address for the time server you selected is removed from the NTP peer list Click on Done You return to the Configuration Manager window 308631 14 20 Rev 00 Customizing NTP Services Configuring NTP Access Control The access control feature allows you to selectively restrict NTP clients from accepting NTP timestamps from specific remote time servers on the network by filtering these timestamps based on the source IP address or an IP subnet address This is similar to an inbound filter that drops NTP packets based on source IP address and IP subnet mask When you delete access for a remote time server peer Site Manager removes the IP address of the time server whose access you restricted from the access control list Configuring NTP access control for a time server involves the following tasks Topic Page Specifying the IP Address of the Time Server 7 13 Specifying a Filter Type and IP Subnet Mask 7 14 Specifying the IP Address of the Time Server When you specify the IP address of the remote time server whose access to the local NTP client you want to restrict NTP adds the IP address of the time server to an access control list which the local NTP client uses when querying remote time servers for time information Use the access control option when operating in broadcast client and multicast client mode To specify the IP
207. stack prompt 1 Go to the global IP prompt box ip ip 2 Configure TCP ip tcp tcp 3 Display TCP default settings tcp info max rto 240000 max win 4096 min rto 250 state enabled Using Site Manager To start TCP services complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose Global Protocols The Global Protocols menu opens 3 Choose TCP The TCP menu opens 4 Choose Create TCP Site Manger enables TCP on the router 1 6 308631 14 20 Rev 00 Starting IP Utilities Starting FTP Services You can use the BCC or Site Manager to configure FTP on the router accepting default values for all parameters If you decide to change some or all of the default values see Chapter 4 Customizing FTP Services Before you begin verify that IP is configured on a router interface For instructions see Verifying that IP Is Configured on a Router Interface on page 1 5 If IP is not yet configured see Configuring IP for Global Protocols on page 1 2 for instructions Using the BCC To start FTP on the router with default settings begin in configuration mode at the box or stack prompt 1 Configure FTP box ftp ftp 2 Display FTP default settings ftp info default volume 2 idle timeout 900 login retries 3 max sessions 3 state enabled tcp window
208. stem responds The Protocols menu opens 2 Choose Global Protocols The Global Protocols menu opens 3 Choose FTP The FTP menu opens 4 Choose Global The Edit FTP Global Parameters window opens Click on Help or see the parameter description on page A 7 5 Set the TCP Window Size parameter 6 Click on OK You return to the Configuration Manager window 308631 14 20 Rev 00 Configuring IP Utilities Deleting FTP You can delete FTP services from the router using the BCC or Site Manager Using the BCC To delete FTP from the router navigate to the TCP prompt for example ip tcp and enter delete For example the following command deletes TCP from the router ftp delete ip Using Site Manager To delete FTP from the router complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose Global Protocols The Global Protocols menu opens 3 Choose FTP The TCP menu opens 4 Choose Delete FTP A message box prompts Do you REALLY want to delete FTP 5 Click on OK Site Manager deletes FTP 4 12 308631 14 20 Rev 00 Chapter 5 Customizing TFTP Services This chapter describes how to customize Trivial File Transfer Protocol TFTP services on the router It assumes that you have configured IP on an interface
209. t Global Protocols gt Telnet Client gt Global None Any text string less than 40 characters long Specifies the default Telnet client command prompt Enter any text string less than 40 characters long for example Router1 1 3 6 1 4 1 18 3 5 3 7 2 5 NTP Parameters Parameter Path Default Options Function Instructions MIB Object ID Use the following guidelines to configure NTP parameters Enable Disable Configuration Manager gt Protocols gt Global Protocols gt NTP gt Global Enable Enable Disable Enables or disables the NTP subsystem on the network device To disable the NTP subsystem on the network device specify Disable 1 3 6 1 4 1 1 18 3 5 3 17 1 1 3 308631 14 20 Rev 00 Configuring IP Utilities Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Mode Configuration Manager gt Protocols gt Global Protocols gt NTP gt Global Client Client BClient MClient Specifies the mode in which you want NTP to run on the router Specify unicast client Client broadcast client BClient or multicast client MClient 1 3 6 1 4 1 18 3 5 3 17 1 1 4 Peer IP Address Configuration Manager gt Protocols gt Global Protocols gt NTP gt Peers gt Add None 0 0 0 0 or any valid IP address
210. t 99 You can use Site Manager to specify a value from 1 to 100 indicating the percentage of the maximum size that causes IP accounting to send a trap message Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose IP The IP menu opens continued 308631 14 20 Rev 00 B 3 Configuring IP Utilities Site Manager Procedure continued You do this System responds 3 Choose Global The Edit IP Global Parameters window opens 4 Set the Trap Percent parameter Click on Help or see the parameter description on page A 40 5 Click on OK You return to the Configuration Manager window Copying the IP Accounting Table to the Checkpoint Table When the IP accounting table is filled to capacity IP accounting can make no further entries until you empty the table You can empty the accounting table by copying its contents to a checkpoint table Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose IP The IP menu opens 3 Choose Global The Edit IP Global Parameters window opens 4 Set the IP Accounting Checkpoint Flag parameter Click on Help or see the parameter description on page A 41 5 Click on OK You return to the Configuration Manager window IP ac
211. t NetBIOS IP Global Parameters window opens Click on Help or see the parameter description on page A 24 5 Set the Hash Entry Count parameter 6 Click on OK Site Manager returns you to the Configuration Manager window 308631 14 20 Rev 00 Configuring IP Utilities Specifying a TTL Value for a Rebroadcast Packet The time to live TTL value restricts the number of routers a rebroadcast packet can traverse To prevent NetBIOS broadcast packets from traversing the network indefinitely set the parameter to a minimal value By default NetBIOS sets the TTL value in each packet to 5 To specify the rebroadcast packet TTL complete the following steps using Site Manager Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens Choose Protocols 2 Choose IP The IP menu opens 3 Choose NetBIOS The NetBIOS menu opens 4 Choose Global The Edit NetBIOS IP Global Parameters window opens 5 Set the Rebroadcast Packet TTL parameter Click on Help or see the parameter description on page A 24 6 Click on OK Site Manager returns you to the Configuration Manager window Enabling the Rebroadcast of Record Routes The Rebroadcast Record Route parameter can prevent rebroadcast packets from looping forever by allowing the NetBIOS entity in the router to determine whether or not it has received this packet befor
212. tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose Global Protocols The Global Protocols menu opens 3 Choose DNS The DNS menu opens continued 10 2 308631 14 20 Rev 00 Customizing the DNS Proxy Site Manager Procedure continued You do this System responds 4 Choose DNS Proxy The DNS Proxy List window opens 5 Set the Enable Disable parameter Click Site Manager displays this field with a on Help or see the parameter description different color background than the other on page A 34 applied parameter settings 6 Click on Apply Site Manager applies the change the background color of this field now matches the rest of the set parameters 7 Click on Done You return to the Configuration Manager window Modifying the DNS Proxy Configuration You can use the BCC or Site Manager to customize the DNS proxy configuration Timeout Considerations for DNS Clients Served by DNS Proxy When determining a value for the DNS client Timeout parameter you must consider whether the DNS client contains an IP address of an interface configured with DNS proxy If DNS client will interact with DNS proxy be sure to set the timeout value so that it allows for the maximum time that the DNS proxy takes to cycle through each uncommunicative configured DNS server until DNS proxy encounters a server that is up You
213. tered files data or programs 4 Limitation of liability INNO EVENT WILL NORTEL NETWORKS OR ITS LICENSORS BE LIABLE FOR ANY COST OF SUBSTITUTE PROCUREMENT SPECIAL INDIRECT INCIDENTAL OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES RESULTING FROM INACCURATE OR LOST DATA OR LOSS OF USE OR PROFITS ARISING OUT OF OR IN CONNECTION WITH THE PERFORMANCE OF THE SOFTWARE EVEN IF NORTEL NETWORKS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES IN NO EVENT SHALL THE LIABILITY OF NORTEL NETWORKS RELATING TO THE SOFTWARE OR THIS AGREEMENT EXCEED THE PRICE PAID TO NORTEL NETWORKS FOR THE SOFTWARE LICENSE 5 Government licensees This provision applies to all Software and documentation acquired directly or indirectly by or on behalf of the United States Government The Software and documentation are commercial products licensed on the open market at market prices and were developed entirely at private expense and without the use of any U S Government funds The license to the U S Government is granted only with restricted rights and use duplication or disclosure by the U S Government is subject to the restrictions set forth in subparagraph c 1 of the Commercial Computer Software Restricted Rights clause of FAR 52 227 19 and the limitations set out in this license for civilian agencies and subparagraph c 1 ii of the Rights in Technical Data and Computer Software clause of DFARS 252 227 7013 for agencies of the Department of Defense or their success
214. that may pertain to or accompany the delivery of this computer software the rights of the United States Government regarding its use reproduction and disclosure are as set forth in the Commercial Computer Software Restricted Rights clause at FAR 52 227 19 Statement of Conditions In the interest of improving internal design operational function and or reliability Nortel Networks NA Inc reserves the right to make changes to the products described in this document without notice Nortel Networks NA Inc does not assume any liability that may occur due to the use or application of the product s or circuit layout s described herein Portions of the code in this software product may be Copyright 1988 Regents of the University of California All rights reserved Redistribution and use in source and binary forms of such portions are permitted provided that the above copyright notice and this paragraph are duplicated in all such forms and that any documentation advertising materials and other materials related to such distribution and use acknowledge that such portions of the software were developed by the University of California Berkeley The name of the University may not be used to endorse or promote products derived from such portions of the software without specific prior written permission SUCH PORTIONS OF THE SOFTWARE ARE PROVIDED AS IS AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES INCLUDING WITHOUT LIMITATION THE IMPLIED
215. times that TFTP retransmits an unacknowledged message before abandoning the transfer attempt By default TFTP abandons the transfer attempt after five unsuccessful retransmissions To specify the number of times that TFTP retransmits an unacknowledged message before aborting navigate to the TFTP prompt and enter integer indicates any number of retransmissions For example the following command causes TFTP to abandon a transfer attempt after 10 retries 5 6 308631 14 20 Rev 00 Using Site Manager Customizing TFTP Services To specify the number of retransmissions that TFTP will attempt complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose IP The IP menu opens 3 Choose TFTP The TFTP menu opens 4 Choose Edit TFTP Parameters The Edit TFTP Parameters window opens Set the Retransmit parameter Click on Help or see the parameter description on page A 9 Click on OK You return to the Configuration Manager window Deleting TFTP from the Router You can use the BCC or Site Manager to delete TFTP from the router Using the BCC To delete TFTP from the router navigate to the TFTP prompt for example tfpt and enter delete For example the following command deletes TFTP from the router tftp delete box 308631 1
216. tion Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Use the following guidelines to configure the parameters in the DNS Server List window and the DNS Server Record window appears when you click on Add from the DNS Server List window The DNS servers configured are for use by the router DNS client Index Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Servers gt Add None 1 to3 Specifies the order in which the router contacts the DNS server For example the router first contacts a server with an index of 1 If that server is not operating the router then contacts a server with an index of 2 Determine the order in which you want the router to contact a particular server and assign the appropriate index value to that server 1 3 6 1 4 1 18 3 5 3 19 2 1 2 IP Address Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Servers gt Add 0 0 0 0 Any valid IP address Specifies the IP address of the DNS server that responds to DNS client requests Enter a 32 bit IP address 1 3 6 1 4 1 18 3 5 3 19 2 1 3 308631 14 20 Rev 00 A 33 Configuring IP Utilities Parameter Port Number Path Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Servers gt Add Default 53 Options 1 to 46000 Function Specifies the UDP port on the DNS server to which the router should conne
217. um 2 time server and so forth Each NTP client in the synchronization subnet chooses as its time source the server with the lowest stratum number that it is configured to communicate with via NTP This strategy effectively builds a self organizing tree of NTP speakers The number of strata is limited to 15 to avoid long lived synchronization loops NTP tries not to synchronize to a remote time server whose time might not be accurate It avoids doing this in two ways First NTP never synchronizes to a remote time server that is not in turn synchronized itself Second NTP compares the time reported by several remote time servers and will not synchronize to a remote time server whose time is markedly different from the others even if its stratum is lower Synchronizing with the Best Available Time Server Unlike other implementations of time synchronization protocols NTP does not attempt to synchronize the remote time server s internal clocks to each other Rather NTP achieves time synchronization by synchronizing their clocks to universal standard time using the best available time source and transmission paths to that time source 308631 14 20 Rev 00 2 17 Configuring IP Utilities NTP uses the following criteria to determine the time server whose time is best e Time server with the lowest stratum e Time server closest in proximity to the primary time server reduces network delays e Time server offering the highest
218. xample the following command line causes FTP to wait 120 seconds 2 minutes before closing an idle FTP control session ftp idle timeout 120 ftp Using Site Manager To set the length of time that FTP waits before closing an idle FTP control connection complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose Global Protocols The Global Protocols menu opens 3 Choose FTP The FTP menu opens 4 Choose Global The Edit FTP Global Parameters window opens continued 4 6 308631 14 20 Rev 00 Customizing FTP Services Site Manager Procedure continued You do this System responds 5 Set the Idle Time Out secs parameter Click on Help or see the parameter description on page A 6 6 Click on OK You return to the Configuration Manager window Specifying the Maximum Number of FTP Sessions You can determine the maximum number of FTP sessions you want to run simultaneously by specifying a value from 1 to 10 000 By default FTP allows up to three sessions at one time Using the BCC To specify the number of sessions navigate to the FTP prompt for example ip ftp and enter max sessions lt integer gt integer is the maximum number of allowable FTP sessions For example the following command sets the maximum number of FTP sessions to 10
219. xy 10 2 FTP 4 2 NetBIOS over IP interface 8 9 NetBIOS over IP on router 8 2 NTP 7 2 TCR 3 2 Telnet client 6 22 Telnet server 6 7 TFTP 5 2 Remote Port parameter Telnet client 6 25 A 17 Retransmit parameter TFTP 5 7 A 9 Retry Time Out parameter TFTP 5 5 A 8 308631 14 20 Rev 00 S show dns commands server D 2 stats D 3 show ftp command D 3 show ntp commands access D 4 D 5 base D 5 peers D 5 stats D 6 show tcp commands connections D 6 stats D 7 show telnet command D 8 show tftp command D 9 Simple Network Management Protocol SNMP 2 11 sockets TCP 2 4 Source IP Address parameter NTP 7 9 A 20 Starting Telnet server 1 9 starting DNS client 1 14 DNS proxy 1 17 FTP 1 7 NetBIOS over IP 1 13 NTP 1 12 TCP 1 5 Telnet 1 9 Telnet client 1 9 TFTP 1 8 Subnet Mask parameter IP configuration 1 4 support Nortel Networks xxi T TCP Transmission Control Protocol clients 2 4 2 6 connection states 2 4 customizing 3 1 deleting 3 7 disabling 3 2 enabling 1 5 global parameters Site Manager A 3 308631 14 20 Rev 00 memory considerations 2 5 overview 2 3 ports 2 4 reenabling 3 2 show tcp connections command D 6 show tcp stats command D 7 starting 1 5 TCP Window Size parameter FTP 4 11 A 7 technical publications xxi technical support xxi Technician Interface 2 11 Telnet customizing 6 1 enabling 1 9 overview 2 11 show telnet command D

Avaya Configuring IP Utilities (308631-14.20 Rev 00) User's Manual

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