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Avaya Configuring IP Utilities User's Manual

1. 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 13 6 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 You can press control c to cancel the user autoscript and access the Technician Interface 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 line 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 304234 A Rev 00 6 5 Configuring IP Utilities For example this command line allows users to cancel the user autoscript at login server force logout disabled server Using Site Manager Complete the tasks in the following table t
2. The Global Protocols menu opens continued 304234 A Rev 00 Customizing FTP Services Site Manager Procedure continued You do this System responds 3 Choose FTP The FTP menu opens 4 Choose Global The Edit FTP Global Parameters window opens 5 Set the Control Connection parameter Click on Help or see the parameter description on page A 6 6 Click on OK Site Manager saves your changes and exits the window 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 IP datagrams on a data transfer connection 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 FTP The FTP menu opens 4 Choose Global The Edit FTP Global Parameters window opens 5 Set the Data Transfer parameter Click on Help or see the parameter description on page A 6 6 Click on OK Site Manager saves your changes and exits the window 304234 A Rev 00 Configuring IP Utilities Specifying the TCP Window Size You can determine
3. 6 22 304234 A Rev 00 Customizing Telnet Services For example the following command line changes the Telnet server s TCP remote port number to 20 client remote port 20 client Using Site Manager To change the remote Telnet server s TCP port complete the tasks in the following table 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 Global The Edit Telnet Client Global Parameters window opens 5 Set the Remote Port parameter Click on Help or see the parameter description on page A 16 6 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 304234 A Rev 00 6 23 Configuring IP Utilities For example the following command line changes the default command prompt to system client prompt system1 client Using Site Manager To change the default Telnet client command prompt complete the tasks in the
4. Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Proxy Mode Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Proxy gt Add Passthru Passthru Specifies that the DNS proxy server is operating in standard pass through mode 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 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 1 3 6 1 4 1 18 3 5 3 19 3 1 8 A 34 304234 A 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
5. Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID 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 304234 A Rev 00 Site Manager Parameters 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 parameters in the Edit Telnet
6. eescecesceeeeeceeeeeeeeeeeeeeeeees E EE EE nt nla D 4 SPeCIVING the Prece donGE yeieiiaieieeadentienieh EAEE A A a D 5 Gibal iF Access Policy Eam asiaa ia a a pa e aariaa D 5 Index 304234 A Rev 00 xi Figures Figure 2 1 TOP Between IP and Clients icici sitiewss anise iangadenvetelasads 2 6 Figure 2 2 FTP Client and Server o cccic ccsctesesniecncnsiaanecannsssendeusaaieadeaneeinenncaatinanes 2 8 Figure 2 3 Telnet SSG F scrinia oia o N Ea 2 13 Pie 4 Tabat Cieni ainakin A a a 2 14 Figure 2 5 Time Servers Forming a Synchronization Subnet oran rere 2 16 Figure 2 6 NTP Time Servers Operating in Unicast Client Mode ccccsceeees 2 19 Figure 2 7 NatBIOS over IP oii sieceosecarei nnn crccnetiniion taste seen lesen n aa 2 20 Figure 2 8 Broadcasting a Name Query Request ccccceeeeeeeeceeeeeteeeseeeneeeaes 2 22 Figure 2 9 Returning a Unicast Name Query Response cceeeeeeeeeeeteeeeeeeees 2 23 304234 A Rev 00 xiii Tables Table 2 1 TOP Pre lieth PAINS esac arnescteta stants pebiveste pittueeriannmant bites ibveetese 2 3 Table 2 2 TCP Comecon AES ts crite atrasetrsaitlecivieanentintuntiatarnuannldxtaatlubesioataaataes 2 4 Table 2 3 TP Cnn SU NG siisii eE Aei 2 9 Table 3 1 TGP C miguration TASKS inansdsntancnl ease a E Table 4 1 FTP Configuration Tasks aonn ET ranni anak Seeks T ER Table 5 1 TPIP SOUP TASKS dairenin a 5 2 Table 6 1 Telnet Configuration TASKS s
7. Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Proxy 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 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 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 1 3 6 1 4 1 18 3 5 3 19 3 1 9 304234 A Rev 00 A 39 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 DNS Server 3 Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Proxy 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 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 53 1 to 46000 Specifies the UDP port to which the DNS servers are connected In most cases a
8. 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 continued 304234 A Rev 00 8 11 Configuring IP Utilities Site Manager Procedure continued You do this 6 Set the following parameters Enable NetBIOS Inbound Broadcasts Enable NetBIOS Outbound Broadcasts Click on Help or see the parameter description on page A 25 System responds Click on Apply then click on Done You return to the Configuration Manager window Supplying a Rebroadcast Address By default NetBIOS uses the IP broadcast address configured for this interface when rebroadcasting NetBIOS packets out this interface You can use Site Manager to supply a rebroadcast address that overrides this broadcast address 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 Interface The NetBIOS IP Interface Table window opens 5 Click on the IP interface that you want to modify 6 Setthe Rebroadcast Address parameter Click on Help or see the parameter description on page A 26 7 Click on Apply then click on Done You return to the Configuratio
9. Configuring IP Utilities BayRS Version 13 10 Site Manager Software Version 7 10 BCC Version 4 10 Part No 304234 A Rev 00 November 1998 Bay Networks Where Information Flows Bay Networks Where Information Flows 4401 Great America Parkway 8 Federal Street Santa Clara CA 95054 Billerica MA 01821 Copyright 1998 Bay Networks Inc All rights reserved Printed in the USA November 1998 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 Bay Networks 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 A summary of the Software License is included in this document Trademarks ACE AFN AN BCN BLN BN BNX CN FRE LN Optivity PPX Quick2Config and Bay Networks are registered trademarks and Advanced Remote Node ANH ARN ASN BayRS BaySecure BayStack BayStream BCC BCNX BLNX EZ Install EZ Internetwork EZ LAN FN IP AutoLearn PathMan RouterMan SN SPEX Switch Node System 5000 and the Bay Networks logo are trademarks of Bay Networks Inc All other trademark
10. 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 A 8 304234 A Rev 00 Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Site Manager Parameters 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 304234 A Rev 00 A 9 Configuring IP Utilities Parameter Path Def
11. 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 24 6 Click on OK You return to the Configuration Manager window Specifying a TTL Value for a Rebroadcast Packet The 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 You can use Site Manager to set a TTL value from 1 to 255 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 continued 8 2 304234 A Rev 00 Customizing NetBIOS over IP Site Manager Procedure continued You do this System responds 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 23 6 Click on OK Site Manager returns you to the Configuration Manager window Enabling the Insertion of Record Route Option The Insertion of Record Route option prevents rebroa
12. 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 IP Accounting Parameters 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 Enables 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 A 42 304234 A 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 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
13. Choose FTP The FTP menu opens 4 Choose Global The Edit FTP Global Parameters window opens Set the Idle Time Out secs parameter Click on Help or see the parameter description on page A 5 Click on OK Site Manager saves your changes and exits the window 4 6 304234 A Rev 00 Customizing FTP Services 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 10000 Using the BCC By default FTP allows up to three sessions at one time To specify the number of sessions navigate to the FTP prompt and enter max sessions lt inieger gt integer is the maximum number of allowable FTP sessions For example the following command sets the maximum number of FTP sessions to 10 ftp max session 10 ftp Using Site Manager Complete the tasks in the following table to specify the maximum number of FTP sessions you want to run at one time 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 Max Sessions parameter Click on Help or see the parameter description on page A 5 6 Click on OK Site Manage
14. 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 Create Server The Telnet Configuration window opens allowing you to customize Telnet Server global parameters To start a Telnet client perform the following actions 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 Create Client The Edit Telnet Global Client Parameters window opens allowing you to customize Telnet Client global parameters Starting NTP Services You can use the BCC command line interface or the Site Manager graphical user interface to configure NTP on the router using default values for all parameters Before you begin Verify that you have configured IP on an interface as described in Configuring IP for Global Protocols on page 1 2 Verify that the remote time servers that you want to configure on the network are reachable via IP 304234 A Rev 00 Starting IP Utilities To do this you must ping the IP address of the time server you want to configure If the server you want to configure is not on the local
15. Router S SISISISISISISISIS Enabling and Disabling Verbose Debug Logging S Changing the Remote Port S S Changing the Command Prompt 304234 A 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 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 line causes the device to assign the name manager bat to the manager s login script server manager script manager1 bat server 304234 A Rev 00 6 3 Configuring IP Utilities Using Site Manager Complete the tasks in the following table to specify a new manager s login script file Site Manager P
16. 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 5 Set the Command 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 Login Retries By changing the login retries you can determine the maximum number of login attempts allowed before the device disconnects the Telnet session Using the BCC By default the device allows you 3 login attempts before it disconnects the Telnet session 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 line tells the device to allow 10 attempts before it disconnects the Telnet session server login retries 10 server 6 14 304234 A Rev 00 Using Site Manager Customizing Telnet Services Complete the tasks in the following table to specify the number of login attempts allowed before the device disconnects the Telnet session Site Manager Procedure You do this System responds al In the Configuration Manager window cho
17. 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 1 3 6 1 4 1 18 3 5 3 19 3 1 9 DNS Server 3 Configuration Manager gt Protocols gt Global Protocols 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 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 304234 A 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 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
18. 2 Overview of IP Utilities This chapter describes the concepts behind TCP FTP TFTP Telnet NTP DNS and NetBIOS over IP services and how Bay 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 system Topic Page TCP Overview ol FTP Overview 2 7 TETP Overview 2 10 Telnet Overview 2211 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 reliable end to end communications IP takes the packet from TCP and passes it along whatever gateways are needed for delivery to the remote TCP layer through the remote IP layer 304234 A Rev 00 2 1 Configuring IP Utilities The Bay 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
19. 304234 A Rev 00 xxi Chapter 1 Starting IP Utilities This chapter describes how to create a basic TCP FTP TFTP Telnet NTP DNS or NetBIOS over IP 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 Starting TCP Services 1 4 Starting FTP Services 1 5 Starting TFTP Services 1 7 Starting Telnet Services 1 8 Starting NTP Services 1 10 Starting NetBIOS over IP 1 12 Starting the DNS Client 1 13 Starting the DNS Proxy Server 1 15 For background information about these protocols see Chapter 2 Overview of IP Utilities 304234 A Rev 00 Configuring IP Utilities Starting Configuration Tools Before configuring TCP FTP TFTP Telnet NTP DNS and NetBIOS over IP services refer to the following user guides for instructions on how to start and use the Bay 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 or modify a device configuration Configuring IP for Global Protocols Before you configure TCP FTP TFTP Telnet NTP DNS or NetBIO
20. 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 A 22 304234 A Rev 00 Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Site Manager Parameters 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 entries does not increase the number of names that a router can cache Wi
21. Basic Input Output System NetBIOS over IP See NetBIOS over IP Network Time Protocol See NTP NTP customizing 7 1 overview 2 15 parameters A 16 starting 1 10 P parameters See parameter names Port Number parameter DNS A 33 ports TCP 2 4 product support XXi Proxy Listen Port Number parameter DNS proxy A 34 A 39 Proxy Mode A 34 Proxy Mode parameter DNS proxy A 34 A 38 publications Bay Networks xxi R Rebroadcast Address parameter 8 12 A 26 Rebroadcast Packet TTL parameter 8 3 A 23 Rebroadcast Record Route parameter 8 3 A 24 304234 A Rev 00 Recursion parameter DNS A 30 Retransmit parameter A 8 Retry Time Out parameter A 7 S Simple Network Management Protocol SNMP 2 11 sockets TCP 2 4 starting IP 1 2 Subnet Mask parameter IP configuration 1 3 support Bay Networks XXi T TCP clients 2 4 2 6 connection states 2 4 to 2 7 customizing 3 1 memory considerations 2 5 overview 2 3 ports 2 4 starting 1 4 TCP Global parameters Enable Disable A 2 Max Retransmission Timeout A 3 Max Window Size 2 5 A 3 Min Retransmission Timeout A 2 TCP Window Size parameter FTP A 6 technical publications XXi technical support XXi Technician Interface 2 11 Telnet customizing 6 1 overview 2 11 starting 1 8 Telnet Client Global parameters descriptions of A 15 Enable Disable A 15 Remote Port A 16 Verbose Debug Logging A 15 Index 3 Telnet
22. 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 304234 A 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 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 Configuration Manager gt Protocols gt IP gt NetBIOS gt Global 300
23. IP Before you begin verify that you have configured IP on an interface as described in Configuring IP for Global Protocols on page 1 2 To start NetBIOS over IP perform the following actions 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 Global The Edit NetBIOS IP Global Parameters window opens Set the Enable Disable parameter Click on Help or see the parameter description on page A 24 Click on OK You return to the Configuration Manager window Adding NetBIOS to an IP Interface To add NetBIOS to an IP interface complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window click on the connector to which you want to add NetBIOS services Site Manager highlights the connector 2 Click on Edit Circuit The Circuit Definition window opens 3 Choose Protocols The Protocols menu opens continued 304234 A Rev 00 Starting IP Utilities Site Manager Procedure continued You do this System responds 4 Choose Add or Delete The Select Protocols window opens 5 Click on NetBIOS Site Manager highlights the selection 6 Click on OK Sit
24. 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 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 A 36 304234 A 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 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 Pr
25. The Telnet Server Global Parameters window opens continued 6 12 304234 A Rev 00 Customizing Telnet Services 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 10 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 Using the BCC By default the device waits 15 minutes before it disconnects the Telnet session if you fail to enter a command at the command prompt 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 integer is a number from 1 to 99 For example the following command line 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 304234 A Rev 00 6 13 Configuring IP Utilities Using Site Manager Complete the tasks in the following table to specify the number of minutes that can elapse before the device disconnects the Telnet session if you fail to enter a command
26. Transmission Type 4 8 Specifying the FTP Control Connection 4 8 Specifying a Data Transfer Value 4 9 Specifying the TCP Window Size 4 10 304234 A 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 Specifying the Data Transmission Type SISISINIS Specifying the FTP Control Connection Specifying a Data Transfer Value Specifying the TCP Window Size v SISISISISISISINIS Disabling and Reenabling FTP After you configure IP and start FTP all FTP default values are automatically enabled on the router Using the BCC To disable FTP navigate to the FTP prompt and enter disable For example this command line disables the FTP server on the router ftp disable ftp To reenable FTP navigate to the FTP prompt and enter enable 4 2 304234 A Rev 00 Customizing FTP Services For example the following command line reenables FTP on the router ftp enable ftp Using Site Manager Complete the tasks in the following t
27. 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 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 304234 A Rev 00 Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Functio
28. a Rebroadcast ROC SS ccs ccscrcascccacessccetastencsqennctesnadsedeiduvenmnesoigineendsonse 8 12 Configuring a Static NetBIOS Name and Address cccceeeceeeeeeeeeeeeeeeeeeeeeeeeeeeeae 8 13 Creating the NetBIOS Static Entry rere penia geteeis acta oneni 8 13 Disabling and Reenabling Static Name Caching ccccccceseseeceeeesseneeeeesseeeaeess 8 14 Adding a Traffic Filter to a NetBIOS Interface 2 2 0 cecceeccecceeeeeeeeeeeeeeeeeeeeeeteeeeeeeeeeeees 8 14 Chapter 9 Customizing the DNS Client Disabling and Reenabling the DNS Client ccccccscceseeceeeeneeeeeeeeeeeaeeeeeeaeeeseneeseaeeneee DOT Modifying the DNS Client Configuration Sete T Aii PEE 9 3 Disabling ihe Recursion Bil sinnesro aa 9 5 Modifying How the DNS Client Handles Server Responses sseseenseeseeeesereseresneen 9 6 Modifying the DNS Server List eerie re PE E E E Teme P eee eee Displaying the DNS Server LSE seirian an momar 9 7 Adding Entries to the DNS Server List ci oersscctssecnursvorenearercenbasdiannireseetannse 9 9 Deleting Entries trom the DNS Server List sic cisaisccecensta cen stcsescotemiedeencenevecnsemee 9 10 Disabling or Reenabling DNS on the Router 0 cccceeeeececeeeeceeeeeeeeeaeeeeeeeeeeeeeeeeaeeeee 9 11 Deleting DNS from the Router ee rR E E aana er 9 12 Chapter 10 Customizing the DNS Proxy Modifying the DNS Proxy Configuration c ccccesescceseernceansaennean sneer eeces kanani 10
29. caches the names you added statically You can use Site Manager to disable and reenable this feature Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens Choose IP 3 Choose NetBIOS The IP menu opens The NetBIOS menu opens 4 Choose Static Name The NetBIOS IP Static Entry Table window opens Click on the static entry that you want to modify Set the Enable parameter Click on Help or see the parameter description on page A 26 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 304234 A Rev 00 Customizing NetBIOS over IP Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Circuits menu
30. 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 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 304234 A Rev 00 A 43 Site Manager Default Settings Appendix B Site Manager Default Settings This appendix lists the Site Manager default settings for TCP FTP TFTP Telnet NTP NetBIOS over IP and IP Accounting Use the Configuration Manager to edit any of the Site Manager default settings listed here TCP Parameters Table B 1 lists the default parameter settings for TCP Table B 1 TCP Configuration Parameters Parameter Default Enable Disable Enable Min Retransmission Timeout 250 ms Max Retransmission Timeout 240000 ms Max Window Size 4096 bytes 304234 A Rev 00 B 1 Configuring IP Utilities FTP Parameters Table B 2 lists the Site Manager default parameter settings for FTP Table B 2 FTP Configuration Parameters Parameters Default Enable Disable Enable Default Volume Volume 2 Login Retries 3 retries Idle Time Out 900 seconds Max Sessions 3 sessions Type of S
31. following table 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 5 Set the Prompt parameter Click on Help or see the parameter description on page A 16 6 Click on OK You return to the Configuration Manager window 6 24 304234 A Rev 00 Chapter 7 Customizing NTP Services This chapter describes how to customize NTP services on the router It assumes you have configured IP on an interface and started NTP using the default parameters as described in Chapter 1 and that you understand the NTP concepts described in Chapter 2 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 7 2 Disabling and Reenabling NTP 7 2 Setting the NTP Operation Mode 7 3 Configuring Remote Time Servers 7 5 Configuring NTP Access Control 7 13 304234 A 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 i
32. 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 A 16 304234 A 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 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 Specifies the IP address of the rem
33. in Configuring IP for Global Protocols on page 1 2 Using the BCC To start a Telnet server on the router with default settings begin in configuration mode at the box level prompt 1 Navigate to the Telnet context box telnet telnet 2 Configure a Telnet server telnet server 304234 A Rev 00 Starting IP Utilities 3 Display Telnet server default settings server info on telnet state enabled manager script automgr bat lines 24 more enabled prompt login timeout 1 password timeout 1 command timeout 15 login retries 3 auto user script force logout disabled history 20 server To start a Telnet client on the router with default settings begin in configuration mode at the box level prompt 1 Configure a Telnet client telnet client 2 Display Telnet client default settings client info on telnet state enabled debug log flag off remote port 23 prompt client Using Site Manager You can easily start Telnet services using default parameter values If you decide to change some or all of the defaults refer to the instructions in Chapter 6 Before you begin verify that you have configured IP on an interface as described in Configuring IP for Global Protocols on page 1 2 304234 A Rev 00 1 9 Configuring IP Utilities To start a Telnet server perform the following actions Site Manager Procedure You do this System responds 1
34. 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 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 A 2 304234 A Rev 00 Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Site Manager Parameters 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
35. network you will need to configure the appropriate IP routing protocol such as RIP or OSPF For information on pinging a server or configuring routing protocols refer to Configuring IP Services Using the BCC To start NTP services on the router with default settings begin in configuration mode at the box level prompt 1 Configure NTP box ntp ntp 2 Display NTP default settings ntp info on box state enabled Using Site Manager You can easily start NTP using all default parameter values If you decide to change some or all of the defaults refer to the instructions in Chapter 7 Before you begin verify that you have configured IP on an interface as described in Configuring IP for Global Protocols on page 1 2 To start NTP services perform the following actions 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 Create NTP Site Manager creates NTP on the router 304234 A Rev 00 Configuring IP Utilities Starting NetBIOS over IP You can easily 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 defaults see the instructions in Chapter 8 Customizing NetBIOS over
36. 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 The 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 304234 A Rev 00 8 15 Chapter 9 Customizing the DNS Client When you create the DNS client default values are in effect for all parameters You may want to change these values depending on the requirements of your network This chapter provides information about how to customize the DNS client configuration It includes information about the following topics Topic Page Disabling and Reenabling the DNS Client oA Modifying the DNS Client Config
37. 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 Access 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 Bay Networks currently supports only the Server option 1 3 6 1 4 1 18 3 5 3 17 3 1 3 A 18 304234 A Rev 00 Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Site Manager Parameters 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 Bay Networks supports only unicast client mode Ac
38. parameter DNS proxy A 35 A 40 DNS Server Port Number parameter DNS proxy A 35 A 40 Domain Name parameter DNS A 30 Domain Name System See DNS E educational services XXi Enable NetBIOS Inbound Broadcasts parameter 8 12 A 25 Enable NetBIOS Outbound Broadcasts parameter 8 12 A 25 Index 1 Enable parameter DNS A 28 IP accounting C 2 NetBIOS static entry 8 14 A 26 TFTP A 7 Enable Disable parameter FTP A 4 NetBIOS global A 20 NetBIOS interface A 24 NTP A 16 TCP A 2 Telnet client A 15 Telnet server A 8 Enable Disable parameter DNS proxy A 38 enabling inbound and outbound broadcasts for NetBIOS over IP 8 11 IP accounting C 2 name caching for NetBIOS over IP 8 10 NetBIOS Insertion of Record Route option 8 3 NetBIOS name caching 8 4 NetBIOS over IP 8 2 8 10 static name caching for NetBIOS over IP 8 14 F FTP File Transfer Protocol customizing 4 1 global parameters A 4 maximum number of sessions 4 7 overview 2 7 starting 1 5 TCP window size 4 10 H Hash Entry Count parameter 8 9 A 23 Idle Time Out parameter FTP A 5 Ignore Truncation Error parameter DNS A 31 Index parameter DNS A 32 Internet Protocol IP 2 1 and TCP 2 1 Index 2 IP accounting configuring C 1 copying table to checkpoint table C 3 enabling C 2 maximum table size for C 2 notification of full table C 3 IP Address parameter DNS A 32 IP configuration 1 3 NetBIOS st
39. the size of the window you require on your system for TCP connections by specifying its size in bytes Using the BCC By default the size of TCP windows used for connections is 60 000 bytes 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 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 Complete the tasks in the following table to specify the size of the windows used for TCP connections 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 TCP Window Size parameter Click on Help or see the parameter description on page A 6 6 Click on OK Site Manager saves your changes and exits the window 4 10 304234 A Rev 00 Chapter 5 Customizing TFTP Services This chapter describes how to customize Trivial File Transfer Protocol TFTP services on the router It assumes you have configured IP on an interface and started TFTP using the default parameters as described in Chapter 1 and that you understand the TFTP concepts described in Chap
40. what you do to start and customize them on a Bay Networks router TCP FTP TFTP Telnet NTP NetBIOS over IP DNS and IP accounting To use any of these protocols on a router interface you must first enable IP services on that interface TM 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 Bay Networks BayRS and Site Manager software For information about upgrading BayRS and Site Manager see the upgrading guide for your version of BayRS 304234 A Rev 00 xvii Configuring IP Utilities 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 p_address gt you enter ping 192 32 10
41. 000 Using Site Manager Complete the tasks in the following table to specify the FTP default volume 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 Default Volume parameter Click on Help or see the parameter description on page A 4 6 Click on OK Site Manager saves your changes and exits the window 304234 A 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 Using the BCC By default FTP accepts only three FTP login retries To change the number of retries navigate to the FTP prompt and enter login retries lt 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 Complete the tasks in the following table to specify an FTP login retry value Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose Global Pr
42. 1 Appendix A Site Manager Parameters TOP COI Pak aii le he aaa a a maa A 2 FTP Global Parameters eens eendi EE T pei PT kami topda Wnai eee A 4 304234 A Rev 00 TFIIF PINIS sas ecient Sect vga gio pede aadeara nate a wet eaiuss adds duciy eaddeAeeentyzacnys A 7 Telnet Server Global Parameters PET E doa Denni eraio E ae AB Telnet Client Global Parameters sdsscteadnstectionticcdintnetsaneetnsieteiepeaieiananes A 15 MIP PANER oraninin a ormntnmne ieny ce treet meater A 16 NetBIOS Global Parameters rere swnd P DONIRA PE A A 20 NetBIOS IP Interface Table Parameters ccccesccecesssscceeeessseeeeessseeeeeeesesaeeeessseaaeess A 24 NetBIOS IP Static Entry Table Parainieters e csscssccnsescnccsseoesserazuuesstpusnsessesaundehsmaduas A 26 DNG GDA PRrameliS doroin Ee laveleepi carted olvehaeg a A 28 DNS Server Record Parameters esorare A 32 DNS Proxy Server Parameters sseeee T E PT PEE T PR a A 33 DNS Proxy Server Record Paral Sc cccseseciccaisntasacelccendcvaninagseceiaatencsusmmncnereieed A 33 DNS Proxy Server ParamelgiS snscsiriiosirinoi nnna an aN ANNE i NDA AASS A 38 IP Accounting Parameters istas E E E Perret paehaniqaes reer ied _A 42 Appendix B Site Manager Default Settings TCP Parameters 006 PETE oing TENTAT P PEA E E ET E B 1 FUP PARAINIGIONS maiia neie nae EEE aE a B 2 EI a E e E A A A OA OAE E A A T B 2 Telnet Parameters ccceeeteeteee
43. 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 304234 A Rev 00 italic text screen text separator gt vertical line Preface Indicates file and directory names 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 Bay
44. 304234 A Rev 00 Customizing NTP Services Configuring Remote Time Servers You configure remote time servers peers for time synchronization in unicast client mode only Configuring a remote time server involves e Adding remote time servers e Specifying the configuration peer mode for the time server e Setting the mode of operation of the router e Specifying a source IP address for the time server e Specifying peer preference e Deleting peers 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 highest 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 Bay Networks recommends that you configure a minimum
45. 4234 A Rev 00 Chapter 4 Customizing FTP Services Configuring FTP Using the BCC or Site Manager c cccccsccescsuessscccsserencsesnenececsuerensereneeee 4 2 Disabing and Roera INO FTP cesena tie 4 2 Specifying the FTP Default Volume iei AE pees eee eens ieee eai en 4B Speciving the Number oF Login Fees sirrinin iiciin iiai 4 5 Specifying the Maximum FTP Idle Timeout ceccccecceeeeceeeeeeeeeeeeeceaeeeeaeseeeeneeesaeeeses 4 6 Specifying the Maximum Number of FTP Sessions conics pannus onpa EES 4 7 Specifying the Data Transmission Type scccscsacviedseserienssieieraiatintere anaes erensaenieces 4 8 Specifying the PIP Control Connection sscc ccissnis duns ratinaiee nanoa 4 8 Speaiving a Data WAnSiot Valg soniri ireen a nie ees 4 9 specin thie TOP Winda SIDE arate ii aE 4 10 Chapter 5 Customizing TFTP Services Configuring TFTP Using the BCC or Site Manager eseeseeseeseeseeererssrrrserrsssresne D 2 Disabling and Reenabling TF TP Services sinusining in annoi naaa 5 2 Specifying the Default Volume for the Router sssssseessseesssesssessreesressresssrnsssrnssrnnssnnsens 5 3 specin a Reiry TMeout VAMC airea deiargalis EAA 5 4 Specifying a Close Timeout Value eee iepeciaemeceecida paiio a eaa 5 5 Sbeciving the Number of Retrans missionS cscrcicraiiscnmnie eei 5 6 Chapter 6 Customizing Telnet Services Configuring Telnet Using the BCC or Site Manager c ccccceeesseeceeeesseeessseneeeeesenaa
46. 4234 A 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 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 304234 A Rev 00 Configuring IP
47. 5 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 A 28 304234 A Rev 00 Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Site Manager Parameters Max Outstanding Query Configuration Manager gt Protocols gt Global Protocols gt DNS gt Global 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 IP Type of Service Configuration Manager gt Protocols gt Global Protocols gt DNS gt Global Low Delay Normal Low Delay Specifies the type of service set in the IP datagram The type of service specifies to the transport layer UDP how the router handles DNS packets Bay Networks recommends Low Delay for DNS packet transfers because a Low Delay setting specifies a high priority for the packets 1 3 6 1 4 1 18 3 5 3 19 1 6 304234 A Rev 00 A 29 Configuring IP Utilities Parameter Path D
48. A Rev 00 3 5 Configuring IP Utilities 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 al In the Configuration Manager window choose Protocols The Protocols menu opens 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 3 6 Click on OK Site Manager saves your changes and exits the window 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 4 096 bytes To specify the maximum window size navigate to the TCP prompt and enter max win lt integer gt integer is a value from 512 to 65 535 bytes For example the following command sets the value for the maximum window size to 1 050 bytes tcp max win 1050 tcp 3 6 304234 A Rev 00 Customizing TCP Services Note When specifying a value for the Maximum Window Size parameter do not use a comma in the value Using Site
49. 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 Disabling or Reenabling DNS on the Router You can disable or reenable DNS client services on the router using either the BCC or Site Manager Using the BCC To disable DNS client services on all circuits on the router navigate to the dns prompt and enter the following command disable For example the following command disables DNS client services on the router dns disable To reenable DNS client services on the router navigate to the dns prompt and enter the following command enable For example the following command reenables DNS client services on the router dns enable dns 304234 A Rev 00 9 11 Configuring IP Utilities Using Site Manager To disable or reenable DNS client services from all circuits 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
50. Choose Global The Telnet Server Global Parameters window opens Click on Help or see the parameter description on page A 11 5 Set the Diagnostic Report parameter 6 Click on OK Site Manager saves your changes and exits the window Enabling Diagnostic Exercise This parameter allows field personnel to enable exercise diagnostics on the Telnet server To enable exercise diagnostics on the Telnet server complete the tasks in the following table 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 continued 304234 A Rev 00 Customizing Telnet Services Site Manager Procedure continued You do this 5 Set the Diagnostic Exercise parameter Click on Help or see the parameter description on page A 12 System responds 6 Click on OK Site Manager saves your changes and exits the window Enabling Diagnostic Network Data This 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 informa
51. 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 304234 A Rev 00 Configuring IP Utilities Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID 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 gt Global Protocols gt Telnet Client
52. Global Parameters window opens 5 Set the Enable parameter Click on Help Site Manager disables DNS on the router or see the parameter description on page A 28 6 Click on OK You return to the Configuration Manager window Deleting DNS from the Router You can delete DNS client services from the router using either the BCC or Site Manager Using the BCC To use 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 9 12 304234 A Rev 00 Using Site Manager Customizing the DNS Client To delete DNS client services from 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 2 Choose Global Protocols The Global Protocols menu opens 3 Choose DNS The DNS menu opens 4 Choose Delete DNS A message window prompts Do you REALLY want to delete DNS 5 Click on OK You return to the Configuration Manager window 304234 A Rev 00 9 13 Chapter 10 Customizing the DNS Proxy When you create the DNS proxy default values are in effect for all parameters You can change these values to match the requirements of your network This chapter pro
53. IMITATION ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE Licensee is responsible for the security of 304234 A Rev 00 iii its own data and information and for maintaining adequate procedures apart from the Software to reconstruct lost or altered files data or programs 4 Limitation of liability INNO EVENT WILL BAY 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 BAY NETWORKS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES IN NO EVENT SHALL THE LIABILITY OF BAY NETWORKS RELATING TO THE SOFTWARE OR THIS AGREEMENT EXCEED THE PRICE PAID TO BAY 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 cla
54. IOS The NetBIOS menu opens 4 Choose Global The Edit NetBIOS IP Global Parameters window opens Set the Hash Entry Count parameter Click on Help or see the parameter description on page A 23 Click on OK Site Manager returns you to the Configuration Manager window 304234 A Rev 00 8 9 Configuring IP Utilities 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 an IP interface Disabling and Reenabling NetBIOS on an Interface When you configure NetBIOS on an interface NetBIOS is automatically enabled You can use Site Manager to disable and reenable NetBIOS on the interface 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 Interface 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 24 The NetBIOS IP Interface Table window opens The parameter values for that interface appear in the window Click on Apply then click on Done You return to the Configuration Manager window D
55. 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 continued 304234 A Rev 00 C 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 IP Accounting Checkpoint Flag parameter Click on Help or see the parameter description on page A 43 5 Click on OK You return to the Configuration Manager window IP accounting 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 C 4 304234 A Rev 00 Appendix D 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 and SNMP You define an access policy by setting parameters as described under the following topics Topic Page Creating and Naming the Policy D 2 Specifying the Network to Which the Policy Applies D 2 Disabling and Reenabling a Policy D 3 Specifying the Policy Action D 3 Disa
56. K Disconnects the current Telnet session 6 10 304234 A Rev 00 Changing the Login Timeout Customizing Telnet Services 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 Using the BCC By default the device waits 1 minute before it disconnects the Telnet session if you fail to enter a login ID at the login prompt 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 line 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 Complete the tasks in the following table to specify the number of minutes that can elapse before the device disconnects the Telnet session 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 5 Set the Login Timeout min paramete
57. Manager Complete the tasks in the following table to set the maximum window size in bytes that TCP allows for each connection Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Edit TCP Global Parameters window opens 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 Window Size bytes parameter Click on Help or see the parameter description on page A 3 6 Click on OK Site Manager saves your changes and exits the window 304234 A Rev 00 3 7 Chapter 4 Customizing FTP Services This chapter describes how to customize FTP services on the router It assumes you have configured IP on an interface and started FTP using the default parameters as described in Chapter 1 and that you understand the FTP concepts described in Chapter 2 After you start FTP on the router FTP default values are in effect for all FTP parameters You 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 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 Data
58. Manager saves your changes and exits the window 304234 A Rev 00 Customizing the DNS Client 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 it waits between requests Using the BCC To modify how the router sends DNS requests navigate to the dns prompt and enter the following parameters time out lt integer gt integer is a value from 1 to 60 seconds max retransmissions lt integer gt integer is a value from 0 to 15 seconds max outstanding queries lt integer gt integer is a value from 1 to 100 tos lt service_type gt service_type is either normal or lowdelay domain name lt name gt name is an alphanumeric character string representing the default domain name the router uses when trying to reach a DNS server use default domain lt state gt state is either enabled or disabled This parameter is valid only if you have 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 An example showing commands that modify t
59. Networks 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 304234 A Rev 00 xix Configuring IP Utilities Acronyms ARP Address Resolution Protocol ATM asynchronous transfer mode BGP Border Gateway Protocol DARPA Defense Advanced Research Projects Agency formerly ARPA DLSw data link switching DNS Domain Name System DoD Department of Defense FIFO first in first out FTP File Transfer Protocol GMT Greenwich mean time TEEE Institute of Electrical and Electronic Engineers ILI Intelligent Link Interface IP Internet Protocol NetBIOS Network Basic Input Output System NTP Network Time Protocol PDU protocol data unit PVC permanent virtual circuit SMDS Switched Multimegabit Data Service SNAP Subnetwork Access Protocol SNMP Simple Network Management Protocol SRM system resource module SVC switched virtual circuit TCP Transmission Control Protocol TCP IP Transmission Control Protocol Internet Protocol TFTP Trivial File Transfer Protocol UDP User Datagram Protocol WAN wide area network XX 304234 A Rev 00 Preface Bay Networks Technical Publications You can now print Bay Networks technical manu
60. S over IP using the BCC or Site Manager you must first start IP on the router 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 1 2 304234 A Rev 00 Starting IP Utilities Site Manager Procedure You do this System responds 1 Inthe Select Protocols window select IP The IP Configuration window opens Then click on OK 2 Set the following parameters IP Address Subnet Mask Transmit Beast Addr UnNumbered Assoc Address Click on Help or see the parameter descriptions in Configuring IP Services 3 Click on OK You return to the Configuration Manager window 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 Configuring a Physical Interface To configure a physical interface on a slot and connector navigate to the top level box prompt and enter lt interface_type gt slot lt s lot_number gt connector lt connector_number gt interface_type is the name of a link module on the router slot_number is the number of
61. Server Global parameters Command Timeout A 11 Diagnostic Network Data A 12 Diagnostic Options A 13 Diagnostic Report A 11 A 12 Force User Logout A 14 Login Retries A 11 Login Timeout A 10 Manager s Login Script A 8 TI More A 9 A 10 User s Login Script A 13 A 14 text conventions XViii TFTP customizing 5 1 overview 2 10 starting 1 7 Threshold parameter IP accounting C 2 Time Out parameter DNS A 28 Timeout parameter DNS proxy A 36 A 40 Transmission Control Protocol See TCP Transmit Bcast Addr parameter IP configuration 1 3 Trap Percent parameter IP accounting C 3 Trivial File Transfer Protocol See TFTP Trunc Max Allowed parameter DNS proxy A 37 A 42 U UnNumbered Assoc Address parameter IP configuration 1 3 Use Auth Answer Only parameter DNS A 31 Use Default Domain Name parameter DNS A 31 W window size for TCP 2 5 4 10 Index 4 304234 A Rev 00
62. Talk Zone Name processing This mechanism uses a hash table that NetBIOS builds and maintains on the 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 s Increases memory usage 8 8 304234 A 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 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 A prime number can only be divided by itself or by 1 and still yield a whole number quotient 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 You can use Site Manager to specify the number of entries you want to allow in the cache lookup tables 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 NetB
63. This window lists all configured DNS servers 5 Click on Add The DNS Server Record window opens continued 304234 A Rev 00 9 9 Configuring IP Utilities Site Manager Procedure continued You do this System responds 6 Set the following parameters Index IP Address Port Number Click on Help or see the parameter descriptions beginning on page A 32 7 Click on OK The DNS Server List window reopens 8 Click on Apply and Done You return to the Configuration Manager window Deleting Entries from the DNS Server List You can delete an entry from the DNS server list using either the BCC or Site Manager Using the BCC To use the BCC to delete an entry from the DNS server list navigate to the prompt for the name server you want to delete and enter the following command delete For example to delete the first DNS server in the list enter name server 1 delete Using Site Manager To use 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 continued 9 10 304234 A Rev 00 Customizing the DNS Client Site Manager Procedure continued You do this System responds 3 Choose DNS The DNS menu opens 4
64. To return to the policy specify prompt enter back For example the following command line returns you to the policy specific prompt network policy_1 192 32 150 0 255 255 255 0 back access policy policy_l 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 you created navigate to the policy specific prompt and enter state lt state gt state is enabled default disabled For example the following command disables policy policy_1 access policy policy_1 state disabled access policy policy_l Specifying the Policy Action By default the policy denies access to the IP utility you specify see Specifying the IP Service on page D 4 To specify whether the IP global access policy you created allows or denies access to an IP utility navigate to the policy specific prompt and enter action lt action gt action is deny default allow 304234 A Rev 00 D 3 Configuring IP Utilities For example the following command allows access to the service specified for policy_1 access policy policy_1 action allow access policy policy_l Disabling and Reenabling Logging By default the IP global access policy turns message logging on To turn message logging off and on for the policy you created navigate to the policy specific prompt and enter log lt state gt state is on default off For example
65. a 2 15 How NTP Distributes Time Within the Subnet 0 00 0 ceeecsseceeesenteeeeesssneeeeeseaaes 2 17 Synchronizing with the Best Available Time Server ceccceeseeesseeeeeeeteeeeeeees 2 17 NTF Modes ol COW cic cceccstatace nreno arana a O E E OA 2 18 Unicast CTBT Mode osesascrnennnannan INE 2 18 Broadcast and Multicast Client Mode rens Gireta oenig abota eee 2 19 NABIOS VSI roris a a 2 20 NetBIOS in an IP Environment c cccccccccececcsseeeesseeccsseeesceeeecseeeesesseceseeseaeeeses 2 21 Forwarding Name Queries over an Unnumbered Interface 0006 dees 2 24 DNS Ae IE sxwaroniuendiapaxeannenien eae miea Aone UReIate 2 24 DNG PEY SU aai iaaa OSEE AAAA AAN AAEE A 2 24 How the DNS Proxy Server WOKS ecscccccsstssaciscncdesiicctad as atieie cae ataedeeat 2 25 How the DNS Cache Works civics basivnnstccsviaiiad nasa pons tinidiasrsbend anointed pained paiva 2 26 Chapter 3 Customizing TCP Services Configuring TCP Using the BCC or Site Manager cccccesseeceeeeeeeeaeeeeeeeeeteaeeetenee ee O72 Disabling and FOCUS WI TOP Sos vticsedaveesticedasbousrseucnnntadeinosenvadundssvendaiulaiad anivodebsanudsnae 3 2 Setting the Minimum Retransmission Timeout ccccccceeeeeeeeeeeeeeeaeeeeeeeeeetaeeeeeneees 3 3 Setting the Maximum Retransmission Timeout cccccceceeeeeeeeeceeeeeeeaeeseeeeeesaeeesenees 3 5 Setting the Maximum Window Size ccceeeeeeereeeeeees ere E E 3 6 vi 30
66. 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 the root and the secondary servers of decreasing accuracy at successive levels from the primary servers Primary server Stratum 1 paca Stratum 2 Secondary servers Stratum 3 TCPO007A Figure 2 5 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 304234 A 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
67. able 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 304234 A Rev 00 A 25 Configuring IP Utilities Parameter Path Default Options Function Instructions MIB Object ID Rebroadcast 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 disables caching of the NetBIOS name you have selected Set the parameter to Enable to activate ca
68. able to enable and disable an FTP server 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 4 6 Click on OK Site Manager saves your changes and exits the 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 To specify the FTP default volume you must enter a value from 1 to 13 for the file system volume On diskette based systems you must enter volume A as the default volume Using the BCC By default FTP uses volume 1 as the default volume To specify a volume navigate to the FTP prompt and enter default volume lt vo lume_number gt volume _number is an integer ranging from 1 to 14 la to 4a or 1b to 4b 304234 A Rev 00 4 3 Configuring IP Utilities For example the following command sequence specifies volume 5 as the default volume and displays attributes and values ftp default volume 5 ftp info on box state disabled default volume 2 login retries 3 idle timeout 900 max sessions 3 tcp window size 60
69. als and release notes free directly from the Internet Go to support baynetworks com library tpubs Find the Bay Networks product for which you need documentation Then locate the specific category and model or version for your hardware or software product Using Adobe Acrobat Reader you can open the manuals and release notes search for the sections you need and print them on most standard printers You can download Acrobat Reader free from the Adobe Systems Web site www adobe com You can purchase Bay Networks documentation sets CDs and selected technical publications through the Bay Networks Collateral Catalog The catalog is located on the World Wide Web at support baynetworks com catalog html and is divided into sections arranged alphabetically e The CD ROMs section lists available CDs e The Guides Books section lists books on technical topics e The Technical Manuals section lists available printed documentation sets Make a note of the part numbers and prices of the items that you want to order Use the Marketing Collateral Catalog description link to place an order and to print the order form How to Get Help For product assistance support contracts information about educational services and the telephone numbers of our global support offices go to the following URL http www baynetworks com corporate contacts In the United States and Canada you can dial 800 2LANWAN for assistance
70. ameter 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 304234 A Rev 00 A 31 Configuring IP Utilities DNS Server Record Parameters The DNS Server Record window contains the parameters that specify the approved DNS servers for the router s DNS client The parameter descriptions follow Parameter Index Path Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Servers gt Add Default None Options 1 to3 Function 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 Instructions Determine the order in which you want the router to contact a particular server MIB Object ID and assign the appropriate index value to that server 1 3 6 1 4 1 18 3 5 3 19 2 1 2 Parameter IP Address Path Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Servers gt Add Default 0 0 0 0 Options Any valid IP address Function Specifies the IP address of the DNS server that responds to DNS client requests Instructions Enter a 32 bit IP address MIB Object ID 1 3 6 1 4 1 18 3 5 3 19 2 1 3 A 32 304234 A Rev 00 Site Manager Parameters Parameter Port Number Path C
71. anager to perform each task Table 3 1 TCP Configuration Tasks Task BCC Site Manager Disabling and Reenabling TCP v Setting the Minimum Retransmission Timeout Setting the Maximum Retransmission Timeout Setting the Maximum Window Size SISINIS v v v Disabling and Reenabling TCP After you configure IP and start TCP all TCP default parameters are 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 and enter disable For example the following command line disables TCP on the router tcp disable tcp To reenable TCP navigate to the TCP prompt and enter enable For example this command line reenables TCP on the router tcp enable tcp 3 2 304234 A Rev 00 Customizing TCP Services Using Site Manager Complete the tasks in the following table to disable and reenable TCP on the router Site Manager Procedure You do this System responds al In the Configuration Manager window choose Protocols The Protocols menu opens 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 Enable Disable parameter Click on Help or see the parameter description on page A 4 6 Click on OK Site Manager saves your changes and exi
72. are 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 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 Bay Networks Agent software or other Bay Networks software products Bay Networks Agent software or other Bay Networks software products are licensed for use under the terms of the applicable Bay Networks 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 Bay Networks and or its licensors retain all title and ownership in both the Software and user manuals including any revisions made by Bay 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 a
73. as described in Configuring IP for Global Protocols on page 1 2 Using the BCC To start TFTP on the router with default settings begin in configuration mode at the box level prompt 1 Configure TFTP box tftp tftp 2 Display TFTP default settings tftp info on box state enabled default volume 2 retry timeout 5 close timeout 25 retry count 5 Using Site Manager You can easily start TFTP services using all default parameter values If you decide to change some or all of the defaults refer to the instructions in Chapter 5 Before you begin verify that you have configured IP on an interface as described in Configuring IP for Global Protocols on page 1 2 304234 A Rev 00 1 7 Configuring IP Utilities To start TFTP services perform the following actions 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 Protocols menu opens 3 Choose TFTP The Edit TFTP Parameters window opens allowing you to customize TFTP parameters By default the default volume is set to 2 Starting Telnet Services You can use the BCC command line interface or the Site Manager graphical user interface to configure Telnet services on the router using default values for all parameters Before you begin verify that you have configured IP on an interface as described
74. 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 proceeds during its lifetime Table 2 2 TCP Connection States State Definition LISTEN 2 TGP listens for a connection request from any remote TCP SYN SENT 8 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 conne
75. atic entry A 27 IP Type of Service parameter DNS A 29 IP starting 1 2 M Max Name Cache Entries parameter NetBIOS 8 7 A 22 Max Outstanding Query parameter DNS A 29 Max Retransmission parameter DNS A 28 Max Outstanding Req A 37 A 41 Max Outstanding Req parameter DNS proxy A 37 A 41 Max Retransmission Timeout parameter TCP A 3 Max Retransmissions parameter DNS proxy A 36 A 41 Max Window Size parameter TCP 2 5 A 3 memory and number of Telnet connections 2 12 considerations for configuring TCP 2 5 Min Retransmission Timeout parameter TCP A 2 Name Cache Age parameter 8 8 A 22 NetBIOS Name Caching parameter global 8 5 A 21 interface 8 11 A 25 NetBIOS over IP adding a traffic filter 8 14 adding to an interface 1 12 aging a cache entry 8 7 configuring a cache 8 4 configuring a static name 8 13 creating MIB instance for cached name 8 6 304234 A Rev 00 customizing a cache search 8 8 defaults B 5 enabling and disabling 8 2 8 10 inbound and outbound broadcasts 8 11 name caching 8 4 8 10 static name caching 8 14 Insertion of Record Route option 8 3 overview 2 20 rebroadcast address for 8 12 size of name cache for 8 7 starting on the router 1 12 TTL value for a rebroadcast packet 8 2 NetBIOS Scope ID parameter A 27 NetBIOS Station Name parameter A 27 NetBIOS IP parameters global A 20 interface A 24 static entry table A 26 Network
76. ations 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 NetBIOS name that the application no longer requires 2 20 304234 A 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 i
77. atrnneGusivine decade Guus 7 13 Specifying the IP Address of the Time Server cscs P PEE PET 7 13 Specifying a Filter Type and IP Subnet Mask ccecccceecseeeeeeeceeeeeeeeeeeeeseaeeeeeaeees 7 14 Deleting Access for a Time Seref sani siesiccsestsavsnaseeieiraniiead nied deoadnitouniueianonan 7 15 Chapter 8 Customizing NetBIOS over IP Disabling and Reenabling NetBIOS cccccceeccecseeeeeeeeceeeaeeeeaeeeaeeseeeeeeeeeeeeeeaeeeeeeeeees 8 2 Specifying a TTL Value for a Rebroadcast Packet ee aadis PE eats E Enabling the Insertion of Record Route Option 0 0 0 ceeceseeeseeeseeseeesaneeeneesenereneeseeeees 8 3 viii 304234 A Rev 00 Gomigurmg a ETON GANE sirara a A 8 4 Enabling Name Caching on the Router iicciccisicosascissceseccasciaredeseendsieranseedaninue 8 4 Creating a MIB Instance for a Cached Name uuu eeeeesseesseeeeeeeeeeeseeseaceeeeenseeenanee 8 6 Specifying the Size of the Name Cache sercsisiunaiiiaeai an 8 7 Aging a Cache Entry Gimme re Roomate re eer peeeenats ee 8 7 TRIS TOMTIZ INAS a Cach SeaGreen aan aea ar aAA EE 8 8 Customizing NetBIOS on an IP WAC occas sssrececcesseesgenassreactyssockaseiusceansedannuacaaycaae 8 10 Disabling and Reenabling NetBIOS on an Interface T arena Sections 8 10 Disabling and Reenabling Name Caching on the Interface cccceeeeeeeeeees 8 10 Disabling Inbound and Outbound Broadcasts ccccccscecssceecsseeeecseeessseeeesseeeees 8 11 Supplying
78. ault Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID 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 A 10 30
79. ault verbose debug logging is turned off disabled To enable verbose debug logging navigate to the client specific prompt and enter debug log flag on For example the following command line enables verbose debug logging client debug log flag on client 304234 A Rev 00 6 21 Configuring IP Utilities To disable verbose debug logging navigate to the client specific prompt and enter client debug log flag off client Site Manager To enable and disable verbose debug logging complete the tasks in the following table 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 5 Set the Verbose Debug Logging parameter Click on Help or see the parameter description on page A 15 The Edit Telnet Client Global Parameters window opens 6 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 Using the BCC By default the Telnet server s TCP remote port is 23 To change the remote port navigate to the client specific prompt and enter remote port lt nteger gt integer is any valid TCP port number
80. ave 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 seven remote time servers When you set the Filter Type to Prefer the local NTP client accepts packets received from remote time servers The Mask parameter allows you to specify an IP subnet mask address to filter NTP timestamps based on a source subnet Using Site Manager Complete the tasks in the following table to add access control to a time server 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 continued 304234 A Rev 00 Customizing NTP Services Site Manager Procedure continued You do this 4 Choose Access System responds 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 Filter Type Access IP Mask Click on Help or see the parameter descriptions on page A 18 The Filter Type Selection box opens 7 Click on Apply 8 Click on Done You return to the Configuration Manager window Deleting Access for a Time Server When you delete access fo
81. ble 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 A 24 304234 A 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 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 configured and enabled on the router and enabled on this interface use this parameter to en
82. bling and Reenabling Logging D 4 Specifying the IP Service D 4 Specifying the Precedence D 5 Global IP Access Policy Example D 5 304234 A Rev 00 D 1 Configuring IP Utilities Creating and Naming the Policy To create an IP global access policy and assign the policy a unique name navigate to the IP global prompt 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 on ip state enabled action deny log on service telnet precedence 0 polname policy_1l Specifying the Network to Which the Policy Applies You must specify the IP address or range of contiguous addresses to which the policy you have created applies Navigate to the policy specify prompt and enter network lt ip_address ip_mask gt ijp_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 D 2 304234 A Rev 00 Configuring IP Global Access Policies You are now in the context of the IP address for the policy
83. ccept 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 secs Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Proxy 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 A 40 304234 A 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 Max Retransmissions Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Proxy 2 0 to 15 Specifies the maximum number of times that the DNS proxy 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 3 1 13 Max Outstanding Req Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Proxy 20 1 to 100 Specifies the maximum number of outstanding quer
84. cept 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 304234 A Rev 00 Configuring IP Utilities Parameter Path Default Options Function Instructions MIB Object ID 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 Function Instructions MIB Object ID Use the following gui
85. che 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 use Site Manager to specify a value from 1 to 2 147 483 647 entries 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 22 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
86. ching 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 A 26 304234 A 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 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 Add None The IP address of the NetBIOS station Specifies an IP address to associate with the statica
87. cian Interface to display information on Telnet diagnostic options complete the tasks in the following table 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 5 Set the Diagnostic Options 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 6 18 304234 A Rev 00 Changing the History File Customizing Telnet Services 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 Using the BCC By default the number of commands that the router stores in the local command history table is 20 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 nteger gt integer is a number from 1 to 40 For example the following command line sets the maximum number of commands that the router stores in the history table to 35 server hist 35 server Using Site Manager Complete the tasks in the followi
88. 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 this 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 304234 A 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
89. cols 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 following parameters NetBIOS Name Caching 15 Character NetBIOS Name Caching Click on Help or see the parameter description on page A 25 6 Click on OK You return to the Configuration Manager window 304234 A Rev 00 8 5 Configuring IP Utilities Creating a MIB Instance for a Cached Name By default NetBIOS creates a MIB instance for each name entry stored in the name cache You can use Site Manager to disable the feature if you want to release system memory and processing resources otherwise dedicated to maintaining cached names in the MIB 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 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 21 6 Click on OK You return to the Configuration Manager window 8 6 304234 A Rev 00 Customizing NetBIOS over IP Specifying the Size of the Name Cache By default NetBIOS allocates space for 100 entries in the name ca
90. ction 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 304234 A 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 request 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 sma
91. d rebroadcasts it to its local network 4 The server on router A receives the IP broadcast request and recognizes its own name ee Router A a C gt Router B Router C gt 5 Router D Key Client Server NetBIOS IP Interface IP0033A Figure 2 8 Broadcasting a Name Query Request 2 22 304234 A 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 i t Pan qs Router B lt q Router C o Router D oO NetBIOS IP Interface IP0034A Figure 2 9 Returning a Unicast Name Query Response 304234 A 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 nam
92. dcast packets from looping forever by allowing the NetBIOS entity in the router to determine whether it has received this packet before on this interface If so the router drops it By default the NetBIOS Insertion of Record Route option in rebroadcast packets is disabled If all IP entities support this option enable it on the router You can use Site Manager to enable the option 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 24 6 Click on OK Site Manager returns you to the Configuration Manager window 304234 A Rev 00 Configuring IP Utilities 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 th
93. delines 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 A 20 304234 A 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 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 caching at every NetBIOS interface configured on this router Select
94. ds 7 Click on Apply Site Manager sets the mode to Client Bay 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 only when you want the remote time server to filter NTP timestamps for the local NTP client based on IP source address You should using a circuitless IP address as the source IP 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 Using the BCC By default the source IP address is 0 0 0 0 To specify a source IP address that overrides the source address of the IP interface from which the NTP packet is transmitted enter src ip address lt address gt For example the following command line causes NTP to use the source IP address 4 4 4 4 to override the IP interface source address peer 3 3 3 3 src ip address 4 4 4 4 peer 3 3 3 3 304234 A Rev 00 7 9 Configuring IP Utilities Using Site Manager To specify the source IP address of a remote time server complete the tasks in the following table Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Pro
95. e 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 Global The Edit IP Global Parameters window opens Set the Threshold parameter Click on Help or see the parameter description on page A 43 Click on OK You return to the Configuration Manager window C 2 304234 A Rev 00 Configuring IP Accounting on a Frame Relay Interface 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 event 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 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 43 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
96. e number on which you are configuring TFTP 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 Edit TFTP Parameters window opens 4 Set the Default Volume parameter Click on Help or see the parameter description on page A 7 5 Click on OK Site Manager saves your changes and exits the 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 Using the BCC By default TFTP waits 5 seconds for an acknowledgment before retransmitting the last packet 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 line causes TFTP to wait 10 seconds before it transmits the last packet tftp retry timeout 10 tfitp 5 4 304234 A Rev 00 Using Site Manager Customizing TFTP Services Complete the tasks in the following table to specify the number of seconds that TFTP waits for an acknowledgment Site Manager Procedure You do this System responds al In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose IP The IP menu opens 3 C
97. e BCC or Site Manager Using the BCC To use the BCC to view the list of all DNS servers to which the router can connect navigate to the dns prompt and enter the following command dns show dns server DNS Servers Server Address Port i Deli 53 2 2e2 2a2 54 3 3 3 3 3 55 To view the information for an individual DNS server enter the following dns name server number lt server_number gt address lt address gt server_number is the number 1 to 3 of the DNS server 304234 A Rev 00 9 7 Configuring IP Utilities address is the IP address of the DNS server whose number you specified To see the IP address and port number of this DNS server enter the following command dns info For example the following commands show the information for the first DNS server dns name server number 1 address 1 1 1 1 name server 1 info number 1 address 1 1 1 1 port 53 name server 1 Using Site Manager To use Site Manager 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 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 a server from the list Th
98. e 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 9 8 304234 A Rev 00 Customizing the DNS Client Adding Entries to the DNS Server List You can add entries up to a maximum of three to the DNS server list Using the BCC To use the BCC to add a new entry up to a maximum of three to the DNS server list navigate to the dns prompt and enter the following parameters dns Nname server number lt server_number gt address lt address gt port lt port_number gt server_number is the number 1 to 3 of the DNS server address is the IP address of the DNS server whose number you specified port_number is the port number on that server If you omit the port number the value defaults to 53 For example the following command adds the first DNS server with an IP address of 1 1 1 1 and a port number of 55 dns name server number 1 address 1 1 1 1 port 55 dns Using Site Manager To use Site Manager to add a new entry up to a maximum of three to 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
99. e Manager returns you 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 To create the DNS client first configure an IP interface as described in Configuring IP for Global Protocols on page 1 2 Then create and enable the DNS client by completing 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 Create DNS The DNS Configuration window opens 5 Click on OK You return to the Configuration Manager window 304234 A Rev 00 1 13 Configuring IP Utilities After you create and enable the DNS client you must specify at least one DNS server You can specify up to a maximum of three DNS servers To specify a DNS server complete the following tasks Site Manager Procedure You do this System responds als 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 6 Set the following parameters I
100. e maximum number of lines displayed on a Telnet console screen 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 9 6 Click on OK Site Manager saves your changes and exits the window 6 8 304234 A Rev 00 Pausing Telnet Console Output Customizing Telnet Services 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 line prevents Telnet console output from pausing server more disabled server Using Site Manager Complete the tasks in the following table to specify whether to pause Telnet console output 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 Te
101. e name query responses it receives and forwards In Figure 2 9 on page 2 23 for example 1 Router A receives a name query response from the server The router gleans from the name query response the name and IP address of the server 2 The router stores the name and IP address of the server in its cache 3 The router forwards the name query response Routers that support NetBIOS must analyze each name query request received on a NetBIOS 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 Enabling Name Caching on the Router NetBIOS name caching 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 You can use Site Manager to enable name caching The 15 character NetBIOS name caching parameter enables the router to treat a NetBIOS name as either a 15 or a 16 character entity 8 4 304234 A Rev 00 Customizing NetBIOS over IP 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 Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Proto
102. e number of the file system volume to which FTP writes transferred files and from which FTP retrieves files for transfer On systems with a diskette specify Volume A 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 A 4 304234 A 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 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
103. e query requests over unnumbered interfaces the network administrator configures a static NetBIOS name entry to the proper NetBIOS name server In this way name query requests will traverse the unnumbered interfaces as unicast IP packets DNS Overview The Domain Name System 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 Bay Networks router functions as a DNS client 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 304234 A Rev 00 Overview of IP Utilities How the DNS Pro
104. 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 stratum 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 s
105. ecursion bit is enabled by default If you do not want to contact more than one server you must disable the recursion bit Using the BCC To disable the recursion bit using the BCC navigate to the dns prompt and enter dns 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 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 5 Set the Recursion parameter to Disable Click on Help or see the parameter description on page A 30 6 Click on OK You return to the Configuration Manager window 304234 A Rev 00 9 5 Configuring IP Utilities 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 use 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
106. ed 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 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 304234 A Rev 00 Bay Networks 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 BAY 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 Bay Networks Inc Bay Networks grants the end user of the Softw
107. ed in Configuring IP for Global Protocols on page 1 2 Using the BCC To configure TCP on the router with default settings begin in configuration mode at the box level prompt 1 Configure TCP box tep 2 Display TCP default settings tcp info on ip state enabled 304234 A Rev 00 Starting IP Utilities min rto 250 max rto 240000 max win 4096 tcp Using Site Manager You can easily start TCP services using default values for all parameters If you decide to change some or all of the default values refer to the instructions in Chapter 3 Customizing TCP Services Before you can start TCP services you must verify that you have configured IP on an interface as described in Configuring IP for Global Protocols on page 1 2 To start TCP services perform the following actions 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 The Edit TCP Global Protocols Parameter window opens allowing you to change TCP global parameters Starting FTP Services You can use the BCC or Site Manager to configure FTP on the router using default values for all parameters Before you begin verify that you have configured IP on an interface as described in Configuring IP fo
108. ed 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 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 304234 A Rev 00 2 3 Configuring IP Utilities Connection Types TCP is a connection oriented protocol that requires application programs
109. eees ET e raktai rs T T Perr E B 3 MIP PANES ooren e a Ea B 4 NetBIOS over IP Parameters sisiccczuaes snccstiw iaeeasbeinnetuaw inania aia B 5 IF Accouning PRACTISE cc sci nssncacs stasepaddvessmce dondeasenantecateondiecmbienaccnsndepeccuesauencnedeaneptacerans B 6 DNS Client ParamolerS ssnsisusnsrcni e B 6 DNS Server Parameters ake Pre errr errr verre erence errr sais B 7 DNG Proxy Server PArAIiGle NS sri eieaa a Neda B 7 Appendix C Configuring IP Accounting on a Frame Relay Interface Enabling IP Accounting on the Router cccciserccccsierscctenmrscctenmrrcsinmierccanenerrsereanersccrenees C 2 Specifying the Maximum Size of the IP Accounting Table ccccecccssseeeesesteeeeeesees C 2 Controlling Notification of a Full IP Accounting Table Garmin T raa A ee Copying the IP Accounting Table to the Checkpoint Table ccccccsssceeeeesteeeeeeeees C 3 x 304234 A Rev 00 Appendix D Configuring IP Global Access Policies Credting and Saini the PONG Y sc csstedsca ccacepadacadauseanctenneaact sanenedstcabiedascrsemreesaqendedecesascreed D 2 Specifying the Network to Which the Policy Applies cc cccceeeeeeeesseeeseeteeetaeeeeeees D 2 Disabling and Reenabling a Policy PERE ee ents aeaii ioiai PT E D 3 SOU IMG he Polity AGOM osissa a D 3 Disabling and Reenabling Logging cecsccesceeeceeeeeencecceeeseeeaeeseeeseaeeecaeseaeeesaeseneeeaaes D 4 Specifying the IP Service
110. efault 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 Global None Any combination of up to 255 alphanumeric characters that specifies a network domain for example baynetworks com Specifies the default domain name that the router 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 Bay Networks router B you can set this parameter to baynetworks com When you enter the command ping router router A the DNS client adds baynetworks com to the command making the actual command ping router baynetworks 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 Global 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 Bay Networks recommends that you accept the default Enable to implement recursion for resolving
111. erver 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 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 Bay 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 304234 A 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
112. ervers for time information Use the access control option when operating in broadcast client and multicast client mode To specify the IP address of the remote time server whose access to the local NTP client you want to restrict complete the tasks in the following table 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 4 Choose Access The NTP Access Configuration List window opens 5 Click on Add The NTP Access Configuration window opens continued 304234 A Rev 00 7 13 Configuring IP Utilities Site Manager Procedure continued You do this System responds 6 Set the Access IP Address parameter Click on Help or see the parameter descriptions on page A 17 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 tells 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 h
113. ervice Binary Control Connection Low delay Data Transfer High Throughput TCP Window Size 16000 bytes TFTP Parameters Table B 3 lists the Site Manager default parameter settings for TFTP Table B 3 TFTP Parameters Parameter Default Enable Enable Default Volume 2 Retry Time Out 5 seconds Close Time Out 25 seconds Retransmit 5 retransmissions B 2 304234 A Rev 00 Site Manager Default Settings Telnet Parameters Table B 4 lists the Site Manager default parameter settings for Telnet configuration Table B 4 Telnet Configuration Parameters Parameters Default Manager s Login Script automgr bat User s Login Script autouser bat Force User Logout Disable Table B 5 lists the Site Manager default parameter settings for a Telnet server Table B 5 Telnet Server Configuration Parameters Parameters Default Enable Disable Enable TI Lines per Screen 24 lines TI More Enable TI Prompt None Login Timeout 1 minute Password Timeout 1 minute Command Timeout 15 minutes Login Retries 3 login attempts Diagnostic Report Disable Diagnostic Exercise Disable Diagnostic Network Data Disable Diagnostic PTY Data Disable Diagnostic Options Disable TI History Depth 20 commands 304234 A Rev 00 B 3 Configuring IP Utilities Table B 6 lists the Site Manager default parameter settings for a Telnet clien
114. ervices airean eeni IE EE TE T Geinn RAN ee 1 7 BS FTA Usa cl pices i co gen ener een err Pee Prereerey N rerrerer rrr ree Tire reer err rer rrr rte 1 8 CTT C IB care p 112122 ee een ene eee nc Re emote a ry rennet errata 1 10 taring RTE OS Over UP cccccanccndacconiesaia iaeia eee saveutindsacasanegidadaabareacesansere 1 12 Adding NetBIOS to an IP Interface socos 1 12 Starting the DNS Client T T oehini E T A aa 1 13 Staring the DNG Froxy GEryGI cinoirirhinani a ae aa a uiai 1 15 Chapter 2 Overview of IP Utilities HAE E E E E E E E E E 2 1 HOA TOF WORS irarria a Hanneeina pias bohaaeaee 2 2 TCP Features 006 gets AET oehini eer rer T ere re oe 2 3 304234 A Rev 00 V CONDE CUON WES orisni n header 2 4 Connections and Connection States 00068 reer TET LNOT EEEE ET 2 4 TOP Memory Considerationg socorrida paa aan a ia aani 2 5 TOP and IP Service Weer cocscuiiniisnissnosi na innana aiaiai 2 6 FTP Overview a a r T mene PE E E seonpnaes saeepictanancees 2 7 PEI VOR sccsxstiriatasmanaiiasamian Aa ea nhenanien ee 2 8 Oe i OUI EIAN S E IR A EI A TE E I TN AA EAE NE 2 10 Te Tai aian a a 2 11 TANG Sever EE E E A E E E E E A E A eR 2 12 Telnet Client Pere ere eros eee eens PT E PEET 2 13 MTP SPIE e Ueicer ds scgnsaned duns cepesananctoedan cadens ssdesashencdetacsendiccoameee 2 15 PRPs TSR E E E E A T E A A TA E T EET 2 15 NTP System Implementation Model MAT E T ee S i
115. es 6 2 Gusiomizmg ihe Tenet Gomiguraliori soriana naa ieee iaaruaeeds 6 3 Changing the Name of the Manager s Login Script File eres P 6 3 Changing the Name of the User s Login Script File cccccccssseeeeeeeeeseeeeeeneeeeees 6 4 Enabling and Dis bling User LOGE cciiisenisuiniseinaensaateadtnredeunsdeenebdaeoauee 6 5 Customizing the Telnet Server on the Router c ccseseeeeeeeeeeeeees ee ere 16 6 Disabling and Reenabling a Telnet Server on the IP Router E AE E 6 6 Specifying the Maximum Number of Lines on the Console cscccsteeeeeseeeees 6 8 Pausing Telnet Console UNG risisco e e 6 9 Changing the Telnet Login Prompt sewnissininnnniaia a 6 10 Changing the Login Timeout en svebis inet ET okei aT ort Changing the Password THMGOUE scicscicccd sty teocstiuetankieiaris e a 6 12 Changing the Command Timeout 2c cccoccssieso cssisnccnsieincieseiteesshiaeos tenn duns 6 13 304234 A Rev 00 vii G andna Login REnoS sarni aa l edtoamauinl aaa 6 14 Using Telnet Server Diagnostics T PTT obedi T An Geren 6 15 Enabling Diagnostic Reporing scsi seriesccceciaiienceinecadeehedaastohernderaonvancionies 6 15 Er bling Diagnostic Exercise in cccis insite insidaaraniensiaie datinenionanmlar 6 16 Enabling Diagnostic Network Data P TE A aa Sere 6 17 Enabling Diagnostic PTY Dala sarmhokercansa aa TS Enabling Diagnhoste OPOS ee renee ete erry tiarna Ta Prete 6 18 Changing mhe Hist
116. for TCP FTP TFTP Telnet NTP DNS NetBIOS and IP accounting You can display the same information using Site Manager online Help For each parameter this appendix provides the following information 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 304234 A Rev 00 A 1 Configuring IP Utilities TCP 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 TCP global parameters in the Configuration Manager window 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
117. he DNS client configuration follows 304234 A Rev 00 9 3 Configuring IP Utilities 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 tos normal dns domain name baynetworks com dns use default domain disabled dns hosts file lookhere Using Site Manager 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 Choose Global Protocols 3 Choose DNS The Global Protocols menu opens The DNS menu opens 4 Choose Global The Edit DNS Global Parameters window opens Edit one or more of the following parameters Time Out Max Retransmission Max Outstanding Query IP Type of Service Domain Name Use Default Domain Name Click on Help or see the parameter descriptions beginning on page A 28 Click on OK You return to the Configuration Manager window 304234 A Rev 00 Disabling Customizing the DNS Client the Recursion Bit 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 r
118. hoose TFTP The Edit TFTP Parameters window opens Set the Retry Time Out parameter Click on Help or see the parameter description on page A 7 Click on OK Site Manager saves your changes and exits the window Specifying a Close Timeout Value You can specify the number of seconds 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 retry 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 line causes TFTP to wait 15 seconds to make sure that the sender has received the last acknowledgment tftp close timeout 15 tfitp 304234 A Rev 00 5 5 Configuring IP Utilities Using Site Manager Complete the tasks in the following table to specify a close timeout value 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 Edit TFTP Parameters window opens 4 Set the Close Time Out parameter Click on Help or see the parameter description on page A 8 5 Click on OK Site Manager saves your changes and exits the window Specifying the Number of Retransmissions You can specify the number of time
119. ient 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 Bay Networks 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 304234 A 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 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 applic
120. ies 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 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 304234 A Rev 00 A 41 Configuring IP Utilities Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Trunc Max Allowed Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Proxy 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 20 1 to 100 Specifies the maximum number of cache entries that the DNS proxy allows to be stored on the router
121. iisssoiinariesiinnadioieinnidnn innii anaana 6 2 Table 7 1 NTP Configuration Tasks PE E eee 7 2 Table B 1 TCP Configuration Parameters siiscsasvsiessieossnercaassne isandnnaareee aaansiaia B 1 Table B 2 FTP Coniiguration ParamelerS sacs cssestsasiiercediuendnrssiecinasmiannidond B 2 Table B 3 TFIIF PANTO S ccin A B 2 Table B 4 Telnet Configuration ParamelarS erisosiniusiienusnisnain nieis B 3 Table B 5 Telnet Server Configuration Parameters cee arag PT B 3 Table B 6 Telnet Client Configuration Parameters c c ccececeeeseeeeeeeeeeeseaeeeeees B 4 Table B 7 NTP Configuration PAPAIN URES visi cia sncusrtssandosceseanasaereidanncuisdinusbasanianand B 4 Table B 8 NetBIOS IP Global Parameters 05 or heii ere ee B 5 Table B 9 NetBIOS IP Interface Table Parameters ccccecceeteceseneeeeseeeeeeaeeeeees B 5 Table B 10 NetBIOS IP Static Entry Table Parameters cccccceseeeeeeeeeeesteeeeees B 6 Table B 11 IP Accounting Parametors ssiccccsicccstconmivcannmencntnnnmrcecnmnierresnnnnmeccsurnmes B 6 Table B 12 DNS Client Parameters morcenrinonaniinn a B 6 Table B 13 DNS server Parameters orita ree PEET ara B 7 Table B 14 DNS Proxy Server Parameters ssisiorisaiimosinuissieiaon neniani B 7 304234 A 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
122. ing IP Utilities Site Manager Procedure continued You do this 5 Click on the IP address of the time server in the NTP Peer list System responds 6 Set the Config Peer Mode parameter Click on Help or see the parameter descriptions on page A 18 7 Click on Apply Site Manager sets the mode for the remote time server to Server Bay Networks supports only the Server option 8 Click on Done You return to the Configuration Manager window Setting Local Host Mode Local Host Mode 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 tasks in the following table Site Manager Procedure You do this System responds al 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 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 19 continued 304234 A Rev 00 Customizing NTP Services Site Manager Procedure continued You do this System respon
123. ing table to enable or disable a Telnet server on an IP router 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 Choose Telnet Server The Telnet Server menu opens 4 Choose Global The Telnet Server Global Parameters window opens 5 Set the Enable Disable 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 304234 A Rev 00 6 7 Configuring IP Utilities Specifying the Maximum Number of Lines on the Console You can specify the maximum number of lines displayed on the Telnet console screen The screen may override the number of lines you specify if Telnet can negotiate the window size with the remote client Make sure that the number that you set is in accordance with your console requirements Using the BCC By default the maximum number of lines displayed on the Telnet screen is 24 To specify the maximum number of lines displayed on the Telnet screen enter lines lt integer gt integer is the maximum number of lines that the console screen can display For example the following command line sets the maximum number of lines displayed on a Telnet console screen to 50 server lines 50 server Using Site Manager Complete the tasks in the following table to specify th
124. ions MIB Object ID The DNS Proxy Server List window contains the DNS parameters for the DNS proxy on the network interface The parameter descriptions follow Enable Disable Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Proxy Enable Enable Disable Enables or disables a DNS proxy on the interface Accept the default Enable to enable DNS proxy services on this interface To disable the DNS proxy set this parameter to Disable 1 3 6 1 4 1 18 3 5 3 19 3 1 2 Proxy Mode Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Proxy Passthru Passthru Specifies that the DNS proxy server is operating in standard pass through mode Accept the default value Passthru 1 3 6 1 4 1 18 3 5 3 19 3 1 6 A 38 304234 A 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 Proxy Listen Port Number Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Proxy 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 DNS Server 1
125. isabling 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 8 10 304234 A Rev 00 Customizing NetBIOS over IP You can use Site Manager to disable or reenable this interface for caching the name of each NetBIOS server active in the network 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 Interface The NetBIOS IP Interface Table 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 25 7 Click on Apply and then click on Done You return to the Configuration Manager window Disabling Inbound and Outbound Broadcasts By default NetBIOS can receive inbound broadcasts on the interface and send outbound broadcasts You can use Site Manager to disable this feature on the interface Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens Choose IP
126. k 255 255 255 0 network no telnet 192 32 150 0 255 255 255 0 back access policy no telnet info on ip state enabled action deny log on service telnet precedence 0 polname no telnet access policy no telnet 304234 A Rev 00 D 5 Symbols 15 Character NetBIOS Name Caching parameter 8 5 A 21 A acronyms XX adding NetBIOS over IP to an interface 1 12 Answer Truncation parameter DNS proxy A 37 A 41 C Cache Size parameter DNS proxy A 38 A 42 clients TCP 2 4 Close Time Out parameter A 8 Command Timeout parameter A 1 1 conventions text xviii Create MIB Inst for Cached Name parameter 8 6 A 21 D Default Volume parameter A 7 defaults NetBIOS over IP parameters B 5 SNMP parameters B 6 disabling inbound and outbound broadcasts for NetBIOS over IP 8 11 name caching for NetBIOS over IP 8 10 NetBIOS over IP 8 2 8 10 static name caching for NetBIOS over IP 8 14 304234 A Rev 00 Index DNS Domain Name System customizing 9 1 10 1 deleting 9 12 9 13 disabling 9 12 overview 2 24 starting 1 13 1 15 DNS client contacting alternate servers 9 5 creating 1 13 1 15 handling server responses 9 6 making server requests 9 3 10 1 DNS server client requests customizing 9 3 10 1 creating list for client 9 7 deleting server entries 9 10 ensuring responses 9 5 DNS Server 1 parameter DNS proxy A 34 A 39 DNS Server 2 parameter DNS proxy A 35 A 39 DNS Server 3
127. le 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 304234 A Rev 00 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 For information about editing TFTP parameters see Chapter 5 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 s
128. ll 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 in the Edit TCP Global Parameters window see Chapter 3 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 304234 A 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 the 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 four use
129. lly 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 304234 A Rev 00 A 27 Configuring IP Utilities DNS 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 The Edit DNS Global Parameters window contains the global DNS parameters for the DNS client on the router The parameter descriptions follow Enable Configuration Manager gt Protocols gt Global Protocols gt DNS gt Global 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 Global 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 Max Retransmission Configuration Manager gt Protocols gt Global Protocols gt DNS gt Global 3 Oto 1
130. lnet 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 9 Click on OK Site Manager saves your changes and exits the window 304234 A Rev 00 6 9 Configuring IP Utilities Changing the Telnet Login Prompt 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 line changes the Telnet login prompt to rtr server prompt rtr1 server Using Site Manager Complete the tasks in the following table to change the Telnet login prompt on the Telnet console screen 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 Server The Telnet Server menu opens 4 Choose Global The Telnet Server Global Parameters window opens Set the TI Prompt parameter Click on Help or see the parameter description on page A 10 Click on O
131. lp HELP Provides helpful information No Operation NOOP Specifies no action Causes the server to send an OK reply continued 304234 A 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 standard 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 fi
132. m 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 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 list 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 304234 A 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 Configuring NTP access control for a time server involves e Specifying the IP address of the remote time server e Specifying a filter type e Specifying an IP subnet mask 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 s
133. manuals and all copies Bay 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 or 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 Bay Network
134. 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 yet 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 304234 A Rev 00 A 3 Configuring IP Utilities 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 Volume 2 Volume 1 to 13 Volume A Specifies th
135. mmand 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 304234 A Rev 00 2 13 Configuring IP Utilities Telnet client Outbound Telnet server p Telnet session E Pett gt TCP connection TCP0005A Figure 2 4 Telnet Client 304234 A Rev 00 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
136. n Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Site Manager Parameters 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 304234 A Rev 00 Configuring IP Utilities Parameter Path Default Options Function
137. n Manager window 8 12 304234 A Rev 00 Customizing NetBIOS over IP 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 e The name of the NetBIOS station from 1 to 16 characters e The IP address of the NetBIOS station e The NetBIOS scope identifier 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 outlined in the DNS specification RFC 833 You can use Site Manager to create a static entry 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 Add The NBIP Addresses window opens 6 Set the following parameters NetBIOS Station Name IP Address NetBIOS Scope ID Click on Help or see the parameter descriptions beginning on page A 27 7 Click on OK You return to the Configuration Manager window 304234 A Rev 00 8 13 Configuring IP Utilities Disabling and Reenabling Static Name Caching By default NetBIOS
138. ndex IP Address Port Number Click on Help or see the parameter descriptions beginning on page A 32 7 Click on OK The DNS Server List window reopens it now lists the index value and the IP address of the server you configured 8 Click on Done You return to the Configuration Manager window 304234 A Rev 00 Starting the DNS Proxy Server Starting IP Utilities To create the DNS proxy server first configure an IP interface You must specify at least one DNS server and you can specify up to a maximum of three DNS servers To configure the DNS proxy 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 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 IP Address DNS Server 1 DNS Server 2 DNS Server 3 The second and third DNS Server addresses are optional Click on Help or see the parameter descriptions beginning on page A 32 7 Click on OK You return to the DNS Proxy List window it now shows the values you configured 8 Click on Apply then on Done You return to the Configuration Manager window 304234 A Rev 00 Chapter
139. ndex None IP Address 0 0 0 0 Port Number 53 DNS Proxy Server Parameters Table B 14 lists the Site Manager default parameter settings for the DNS proxy server Table B 14 DNS Proxy Server Parameters Parameter Default Enable Disable Enable Proxy Mode Passthru Proxy Listen Port Number 53 Timeout in secs Max Retransmissions Max Outstanding Req 20 Answer Truncation Disable continued 304234 A Rev 00 B 7 Configuring IP Utilities Table B 14 DNS Proxy Server Parameters continued Parameter Default Trunc Max Allowed 1 Cache Size 20 B 8 304234 A Rev 00 Appendix C 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 interface 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 Bay Networks currently provides IP accounting support for frame relay networks 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
140. ndicates 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 Setting the NTP Operation Mode Adding Remote Time Servers v Setting the Mode for a Remote Time Server v Setting Local Host Mode Specifying the Source IP Address v Specifying Peer Preference Deleting Remote Time Servers from a Router v Configuring NTP Access Control SISISISISISISINIS 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 and enter disable For example the following command line disables NTP on the router ntp disable ntp To reenable NTP services navigate to the NTP prompt and enter enable 7 2 304234 A Rev 00 Customizing NTP Services For example the following command line reenables NTP on the router ntp enable ntp Using Site Manager To disable and reenable NTP on the router complete the tasks in the following table 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 Global The Edit NTP Global Paramete
141. ng table to specify the number of commands that the router stores in the history table 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 Server The Telnet Server menu opens 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 14 Click on OK Site Manager saves your changes an exits the window d 304234 A Rev 00 6 19 Configuring IP Utilities Configuring a Telnet Client on the Router 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 You may want to change these parameter values depending on the requirements of your network The following sections describe information you supply and options you select that affect the way a Telnet client runs on the router 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 prom
142. o cancel the user autoscript at login or to prevent users from canceling the user autoscript at login 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 Force User Logout 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 Customizing the Telnet Server on the Router This section describes how to customize your Telnet server on the router 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 By default the Telnet server is enabled on the IP router To disable a Telnet server navigate to the Telnet server prompt and enter disable 6 6 304234 A Rev 00 Customizing Telnet Services For example telnet server server disable To reenable a Telnet server on the IP router navigate to the Telnet server prompt and enter enable For example telnet server server enable Using Site Manager Complete the tasks in the follow
143. of three upper stratum remote time servers peers for a router because it 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 304234 A Rev 00 7 5 Configuring IP Utilities Using the BCC To specify the IP address of each peer that you want to add to the router navigate to the NTP prompt and enter peer lt address gt address is 0 0 0 0 or any valid IP address For example the following command line adds the peer 2 2 2 2 to the router ntp peer 2 2 2 2 peer 2 2 2 2 Using Site Manager Complete the tasks in the following table to specify the IP address of each NTP time server you want to add 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 Peers The NTP Peers Configuration List window opens Click on Add The NTP Peer Configuration window opens Set the Peer IP address parameter Click on Help or see the parameter descriptions on page A 17 Click on OK The NTP Peer Configuration List window opens displaying the IP address of the time server
144. ols The Global Protocols menu opens 3 Choose TCP The TCP menu opens 4 Choose Global The Edit TCP Global Parameters window opens Set the Min Retransmission Timeout msec parameter Click on Help or see the parameter description on page A 2 Click on OK Site Manager saves your changes and exits the window 304234 A Rev 00 Customizing TCP Services 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 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 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 and enter max rto lt inleger gt integer is a value from 15 000 to 240 000 ms For example the following command sets the value for the maximum retransmission timeout to 235 000 ms tcp max rto 235000 tcp Note When specifying a value for the Maximum Retransmission Timeout parameter do not use a comma in the value 304234
145. on the remote router For information about creating the FTP server on the router see Chapter 1 For information about editing FTP parameters see Chapter 4 304234 A 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 sequenced transfer of data and control messages Figure 2 2 Host Router FTP FTP Client Server Data connection TCP0002A Figure 2 2 FTP Client and Server 2 8 304234 A Rev 00 Overview of IP Utilities Table 2 3 describes the FTP commands that the FTP server supports on Bay 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 user s encrypted identification for access control Logout QUIT Terminates the session and close
146. onfiguration 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 connect Instructions MIB Object ID 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 2 1 4 DNS Proxy Server Parameters As with the DNS global parameters you first define a record for a DNS proxy server to add it to the DNS proxy server list Then you can edit the contents of that record using the DNS Proxy List window DNS Proxy Server Record Parameters The DNS Proxy Record window appears when you add a new DNS proxy server from the DNS Proxy List window The parameter descriptions for the DNS Proxy Record window follow Parameter IP Address Path Configuration Manager gt Protocols gt Global Protocols gt DNS gt DNS Proxy gt Add Default 0 0 0 0 Options Any valid IP address Function Specifies the IP address of the local IP interface Instructions If you have already configured IP on the interface that IP address appears as the MIB Object ID default Either accept that address or supply a different address to use for the local IP interface 1 3 6 1 4 1 18 3 5 3 19 3 1 4 304234 A Rev 00 A 33 Configuring IP Utilities Parameter Path Default Options Function Instructions MIB Object ID Parameter Path
147. onfiguration Manager gt Protocols gt Global Protocols gt FTP gt Global 60000 5000 to 64000 bytes Specifies the size of the windows 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 A 6 304234 A Rev 00 Site Manager Parameters 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 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 2 112131415161718lol1oli1 12113114 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 O
148. onfigure the maximum number of cache entries The default is 20 When the DNS proxy receives a request it searches 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 304234 A Rev 00 Chapter 3 Customizing TCP Services This chapter describes how to customize TCP services on the router It assumes you have configured IP on an interface and started TCP using the default parameters as described in Chapter 1 and that you understand the TCP concepts described in Chapter 2 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 Configuring TCP Using the BCC or Site Manager 3 2 Disabling and Reenabling TCP 3 3 Setting the Minimum Retransmission Timeout 3 3 Setting the Maximum Retransmission Timeout 3 5 Setting the Maximum Window Size 3 6 304234 A Rev 00 3 1 Configuring IP Utilities Configuring TCP Using the BCC or Site Manager Table 3 1 lists the TCP configuration tasks described in this chapter and indicates whether you can use the BCC or Site M
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150. ose 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 5 Set the Login Retries 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 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 The BCC does not support these functions Enabling Diagnostic Reporting This 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 304234 A Rev 00 6 15 Configuring IP Utilities To enable the Technician Interface to display a report showing a record of all processing operations complete the tasks in the following table 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 Telnet Server The Telnet Server menu opens 4
151. ote time server 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 NTP The Global Protocols menu opens The NTP menu opens 4 Choose Peers The NTP Peers Configuration List window opens Click on the IP address of the time server that displays in the NTP Peer list Set the Peer Preference parameter Click on Help or see the parameter descriptions on page A 20 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 304234 A 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 and enter delete For example the following command line deletes the time server 3 3 3 3 peer 3 3 3 3 delete ntp Using Site Manager To delete remote time servers from a router complete the tasks in the following table Site Manager Procedure You do this Syste
152. ote 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 304234 A 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 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 address and source subnet mask Specify Restrict
153. otocols 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 Login Retries parameter Click on Help or see the parameter description on page A 4 6 Click on OK Site Manager saves your changes and exits the window 304234 A 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 must determine the maximum idle time you want to allow and specify the time value in seconds Using the BCC By default FTP waits 900 seconds before closing an idle FTP control connection To specify a timeout interval navigate to the FTP prompt and enter idle timeout lt nteger gt integer is the number of seconds FTP waits before timing out For example the following command line causes FTP to wait 150 seconds before closing an idle FTP control session ftp idle timeout 150 ftp Using Site Manager Complete the tasks in the following table to set the length of time in seconds that FTP waits before closing an idle FTP control connection 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
154. otocols 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 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 304234 A Rev 00 A 37 Configuring IP Utilities Parameter Path Default Options Function Instructions MIB Object ID 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 DNS Proxy Server Parameters Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instruct
155. 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 established 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 t
156. pt and enter disable For example the following command line disables a Telnet client client disable client To reenable a Telnet client on the IP router and display its default values navigate to the client specific prompt and enter enable For example the following command line reenables a Telnet client client enable client info on telnet state enabled debug log flag off remote port 23 prompt 6 20 304234 A Rev 00 Customizing Telnet Services Using Site Manager Complete the tasks in the following table to enable or disable a Telnet client on an IP router 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 Global The Telnet Client Global Parameters window opens 5 Set the Enable Disable parameter Click on Help or see the parameter description on page A 8 6 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 Using the BCC By def
157. r 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 304234 A Rev 00 6 11 Configuring IP Utilities 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 Using the BCC By default the device waits 1 minute before it disconnects the Telnet session if you fail to enter a password at the password prompt 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 inieger 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 Complete the tasks in the following table to specify the number of minutes that can elapse before the device disconnects the Telnet session if you fail to enter a password 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
158. r Global Protocols on page 1 2 304234 A Rev 00 1 5 Configuring IP Utilities Using the BCC To start FTP on the router with default settings begin in configuration mode at the box level prompt 1 Configure FTP box ftp ftp 2 Display FTP default settings ftp info on box state enabled default volume 1 login retries 3 idle timeout 900 max sessions 3 tcp window size 60000 ftp Using Site Manager You can easily start FTP using default values for all parameters If you decide to change some or all of the defaults refer to the instructions in Chapter 4 Before you begin verify that you have configured IP on an interface as described in Configuring IP for Global Protocols on page 1 2 To start FTP services perform the following actions 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 Create FTP Site Manager creates FTP on the router 1 6 304234 A Rev 00 Starting IP Utilities Starting TFTP Services You can use the BCC command line interface or the Site Manager graphical user interface to configure TFTP on the router using default values for all parameters Before you begin verify that you have configured IP on an interface
159. r a remote time server peer Site Manager removes the IP address of the time server whose access you restricted from the access control list 304234 A Rev 00 7 15 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 and that you understand the NetBIOS over IP concepts described in Chapter 2 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 8 2 Specifying a TTL Value for a Rebroadcast Packet 8 2 Enabling the Insertion of Record Route Option 8 3 Configuring a NetBIOS Cache 8 4 Customizing NetBIOS on an IP Interface 8 10 Configuring a Static NetBIOS Name and Address 8 13 Adding a Traffic Filter to a NetBIOS Interface 8 14 304234 A Rev 00 8 1 Configuring IP Utilities Disabling and Reenabling NetBIOS When you start NetBIOS on the router NetBIOS is automatically enabled To disable or reenable NetBIOS over IP complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens Choose Protocols
160. r saves your changes and exits the window 304234 A Rev 00 4 7 Configuring IP Utilities Specifying the Data Transmission Type You can determine the type of data transmission you want to use to transfer your files To tranfer files consisting of ASCII characters specify ASCII To specify files consisting of binary characters specify Binary You can use Site Manager to specify the data transmission type you want to use 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 5 Set the Type of Service parameter Click on Help or see the parameter description on page A 5 6 Click on OK Site Manager saves your changes and exits the 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 You can use Site Manager to specify the type of service value Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose Global Protocols
161. ransmitted 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 304234 A 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 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 stor
162. requests to a DNS server 1 3 6 1 4 1 18 3 5 3 19 1 8 A 30 304234 A 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 Ignore Truncation Error Configuration Manager gt Protocols gt Global Protocols gt DNS gt Global 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 Global 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 Global Enable Enable Disable If you entered a value for the Domain Name parameter this par
163. rocedure 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 Telnet Server The Telnet Server menu opens Choose Global Set the Manager s Login Script parameter Click on Help or see the parameter description on page A 13 6 Click on OK The Telnet Configuration window opens ay wo ry 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 line causes the system to automatically execute the script file router bat at login server auto user script router1 bat server 304234 A Rev 00 Customizing Telnet Services Using Site Manager Complete the tasks in the following table to specify a new user s login script file Site Manager Procedure
164. rs of TCP IP services data link switching DLSw Telnet FTP and BGP TCP0001A Figure 2 1 TCP Between IP and Clients 2 6 304234 A 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 For information about editing TCP parameters see Chapter 3 FTP Overview The File Transfer Protocol allows files to be transferred 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
165. rs window opens 5 Set the Enable Disable parameter Click on Help or see the parameter description on page A 2 6 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 304234 A Rev 00 Configuring IP Utilities To specify the mode in which you want NTP to run on the router complete the tasks in the following table 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 Global The Edit NTP Global Parameters window opens 5 Set the Mode parameter Click on Help or see the parameter description on page A 17 6 Click on OK You return to the Configuration Manager window 7 4
166. s Inc 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 AGREES THAT THIS AGREEMENT IS THE ENTIRE AND EXCLUSIVE AGREEMENT BETWEEN BAY 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 BAY NETWORKS UNLESS BAY NETWORKS GIVES ITS EXPRESS WRITTEN CONSENT INCLUDING AN EXPRESS WAIVER OF THE TERMS OF THIS AGREEMENT iv 304234 A Rev 00 Contents Preface PSY RUUD E ces creek taurine ts can ead E AE E A T xvii FTAA css cos E xviii PTO TE dacuichpastasinaniatieshisuaeiineneeh inate i eee ian NRT XX Bay Networks Technical Publications cccccccsccxscssceivcsbeonscctdccnieeseendiursdceuuubcecusubessieusswostoouss xxi Fow to Get HEI ironta aE eae eta tees xxi Chapter 1 Starting IP Utilities Staring Contiguialon TOOS samacanenae n E NEN 1 2 Goniguring IP for Global Praca srosnsinrsnaryiar tn RAE 1 2 Usmo Site Managot srini aaiae aa E iaa EEA Eaa aa AA 1 2 Using the BOO asserire aai EE E a a 1 3 Step 1 Configuring a Physical Mierace sc cccesainntenie end aes 1 3 Step 2 Configuring Sa IP MeracE senasis eiA ENRE 1 4 RSCG TOP GEMES rinio aaar E E A E A EESE 1 4 ea e a A E E E O T A 1 5 Starting TFTP S
167. s TFTP retransmits an unacknowledged message before abandoning the transfer attempt Using the BCC By default TFTP abandons the transfer attempt after five unsuccessful retransmissions To specify the number of times TFTP retransmits an unacknowledged message before aborting navigate to the TFTP prompt and enter retry count lt integer gt integer indicates any number of retransmissions For example the following command line causes TFTP to abandon the transfer attempt after 10 retries tftp retry count 10 tfitp 5 6 304234 A Rev 00 Using Site Manager Customizing TFTP Services Complete the tasks in the following table to specify the number of retransmissions that TFTP will attempt Site Manager Procedure You do this System responds al In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose IP The IP menu opens 3 Choose TFTP The Edit TFTP Parameters window opens 4 Set the Retransmit parameter Click on Help or see the parameter description on page A 8 5 Click on OK Site Manager saves your changes and exits the window 304234 A Rev 00 5 7 Chapter 6 Customizing Telnet Services This chapter describes how to customize Telnet services on the router It assumes you have configured IP on an interface and started Telnet using the default parameters as described in Chapter 1 and that you understand the Telnet concep
168. s 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 i of the Rights in Technical Data and Computer Software clause at DFARS 252 227 7013 Notwithstanding any other license agreement 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 Bay Networks Inc reserves the right to make changes to the products described in this document without notice Bay Networks 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 develop
169. s 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 Bay Networks and its licensors confidential and proprietary intellectual property Licensee shall not sublicense assign or otherwise disclose 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 Bay 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 Bay Networks warrants each item of Software as delivered by Bay Networks and properly installed and operated on Bay 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 Bay Networks will at its discretion provide a suitable fix patch or workaround for the problem that may be included in a future Software release Bay Networks further warrants to Licensee that the media on which the Software is provided will be free from defects in materials and
170. s 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 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 He
171. st 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 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 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 304234 A Rev 00 Overview of IP Utilities ii TEEN HTT A NTP clients o NTP time TTT servers HTT Server A Server B Peer list HTT HEEL C TCP0006A 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 cl
172. state is enabled or disabled For example the following commands tell the router 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 use 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 continued 9 6 304234 A Rev 00 Customizing the DNS Client Site Manager Procedure continued You do this System responds 5 Edit one or both of the following parameters Ignore Truncation Error Use Auth Answer Only Click on Help or see the parameter descriptions on page A 31 6 Click on OK You return to the Configuration Manager window Modifying the DNS Server List The DNS server list contains the DNS servers up to a maximum of three that the DNS client can query You can display the server list and add entries to and delete entries from the it Displaying the DNS Server List You can view the list of DNS servers to which the router can connect using either th
173. t Table B 6 Telnet Client Configuration Parameters Parameters Default Enable Disable Enable Verbose Debug Logging OFF Remote Port 23 Prompt None NTP Parameters Table B 7 lists the Site Manager default parameter settings for NTP Table B 7 NTP Configuration Parameters Parameters Default Enable Disable Enable NTP Mode Unicast Client Create Delete Peer Create Configure Peer Mode Server Local Host Mode Client Source IP Address None Peer Preference No Access IP Address None Filter Type Restrict Access IP Mask None Peer IP Address None B 4 304234 A Rev 00 NetBIOS over IP Parameters Site Manager Default Settings Table B 8 lists the Site Manager default settings for NetBIOS IP global parameters Table B 8 NetBIOS IP Global Parameters Parameter Default Enable Disable Enable NetBIOS Name Caching Disable 15 Character NetBIOS Name Disabled Caching Create MIB Inst for Cached Name Enabled Max Name Cache Entries 100 entries Name Cache Age 300s Hash Entry Count 253 Rebroadcast Packet TTL 5s Rebroadcast Record Route Disabled Table B 9 lists the Site Manager default settings for NetBIOS IP interface table parameters Table B 9 NetBIOS IP Interface Table Parameters Parameter Default Enable Disable Disable NetBIOS Name Caching Enable Enable NetBIOS Inbound Enable Broadcasts Enable NetBIOS Outbo
174. t 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 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 304234 A 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 an
175. ter enable For example the following command line reenables TFTP on the router tftp enable tftp 5 2 304234 A Rev 00 Customizing TFTP Services Using Site Manager To disable and reenable TFTP services perform the following actions 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 Edit TFTP Parameters window opens 4 Set the Enable parameter Click on Help The field is selected or see the parameter description on page A 7 5 Click on OK You return to the Configuration Manager window Specifying the Default Volume for the Router When you configure a router you must specify which of the router s slots will be used by default for all TFTP GETs and PUTs Using the BCC By default the slot on which TFTP runs on the router is slot 2 If you are configuring an AN router you must specify slot 1 To specify the slot on which TFTP runs navigate to the TFTP prompt and enter default volume lt siot gt s ot is an integer in the range 1 to 14 la to 4a or 1b to 4b For example the following command line sets the default volume on which TFTP runs to 3 tftp default volume 3 tftp 304234 A Rev 00 5 3 Configuring IP Utilities Using Site Manager Complete the tasks in the following table to specify the appropriate volum
176. ter 2 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 Configuring TFTP Using the BCC or Site Manager oe Disabling and Reenabling TFTP Services 5L 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 304234 A Rev 00 5 1 Configuring IP Utilities Configuring TFTP Using the BCC or Site Manager Table 5 1 lists the TFTP configuration tasks described in this chapter and indicates whether you can use the BCC or Site Manager to perform each task Table 5 1 TFTP Configuration Tasks Task BCC Site Manager Disabling and Reenabling TFTP Services v Specifying the Default Volume for the Router Specifying a Retry Timeout Value Specifying a Close Timeout Value Specifying the Number of Retransmissions SISISINIS SISINSIS Disabling and Reenabling TFTP Services After you configure IP and start TFTP on the router all TFTP default parameters are automatically enabled on the router Using the BCC To disable TFTP navigate to the TFTP prompt and enter disable For example the following command line disables TFTP on the router tftp disable tftp To reenable TFTP navigate to the TFTP prompt and en
177. th 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 304234 A Rev 00 A 23 Configuring IP Utilities Parameter Path Default Options Function Instructions MIB Object ID 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 following guidelines to configure the parameters in the NetBIOS IP Interface Ta
178. that you configured and the default NTP peer configuration parameter values 304234 A Rev 00 Customizing NTP Services 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 Using the BCC To specify the mode in which a remote time server operates enter mode lt mode_type gt mode_type is either server or peer For example the following command line sets the mode in which the remote server 3 3 3 3 will operate to server peer 3 3 3 3 mode server peer 3 3 3 3 info on ntp address 3 3 3 3 mode server src ip address 0 0 0 0 Using Site Manager To specify the mode for the remote time server complete the tasks in the following table 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 Peers The NTP Peers Configuration List window opens continued 304234 A Rev 00 7 7 Configur
179. 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 For information about modifying Telnet default parameters see Chapter 6 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 Telnet 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 304234 A Rev 00 Overview of IP Utilities Telnet server Inbound Telnet session e 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 co
180. the following command turns off logging for policy_1 access policy policy_1 log off access policy policy_l Specifying 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 and enter service lt service gt service is telnet default ftp tftp snmp ntp D 4 304234 A Rev 00 Configuring IP Global Access Policies For example the following command specifies FTP as the IP utility controlled by policy_1 access policy policy_1 service ftp access policy policy_l Specifying the Precedence The precedence parameter specifies the precedence of this policy relative to other global IP access policies There is no default for this parameter To set the precedence parameter for a global IP access policy navigate to the policy specific prompt and enter precedence lt precedence gt precedence is an integer For example the following command sets the precedence parameter to 5 access policy policy_1 precedence 5 access policy policy_l 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 on access policy no telnet state enabled address 192 32 150 0 mas
181. 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 The following sections describe how to configure IP accounting on a frame relay interface Topic Page Enabling IP Accounting on the Router C 2 Specifying the Maximum Size of the IP Accounting Table C 2 Controlling Notification of a Full IP Accounting Table C 3 Copying the IP Accounting Table to the Checkpoint Table C 3 304234 A Rev 00 C 1 Configuring IP Utilities Enabling IP Accounting on the Router By default IP accounting support is disabled on the router You can use Site Manager to enable IP accounting Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens Chose IP The IP menu opens 3 Choose Global The Edit IP Global Parameters window opens Set the Enable parameter Click on Help or see the parameter description on page A 42 Click on OK You return to the Configuration Manager window 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 Procedur
182. the slot on which the link module is located connector_number is the number of a connector on the link module For example the following command configures an Ethernet interface on slot 2 connector 2 box ethernet slot 2 connector 2 ethernet 2 2 304234 A Rev 00 1 3 Configuring IP Utilities Step 2 Configuring 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 mask expressed in either dotted decimal notation or in bit notation For example the following command configures IP interface 2 2 2 2 255 0 0 0 on an Ethernet physical interface on slot 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 You can customize IP by modifying IP global and interface parameters as described in Configuring IP Services Starting TCP Services You can use the BCC command line interface or the Site Manager graphical user interface to start TCP on the router using default values for all parameters Before you begin verify that you have configured IP on an interface as describ
183. tion complete the tasks in the following table 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 5 Set the Diagnostic Network Data 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 304234 A Rev 00 6 17 Configuring IP Utilities Enabling Diagnostic PTY Data To specify whether you want the Technician Interface to display pseudo terminal driver PTY information complete the tasks in the following table 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 5 Set the Diagnostic PTY Data 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 Options To specify whether you want the Techni
184. 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 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 304234 A 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 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 C
185. to live If the entry is valid the router will receive a positive name query response which will validate the entry from 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 304234 A Rev 00 8 7 Configuring IP Utilities By default inactive NetBIOS names expire from the NetBIOS name cache after 300 seconds You can use Site Manager to specify any time value that can rapidly age infrequently referenced names out of the NetBIOS name cache 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 22 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 Apple
186. tocols menu opens choose 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 the IP address of the time server that appears in the NTP Peer list 6 Set the Source IP Address parameter Click on Help or see the parameter descriptions on page A 19 7 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 8 Click on Done You return to the Configuration Manager window 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 option value is set to No This means that the local NTP client rejects packets from the remote time server You can enable peer preference for a remote time server by changing the Peer Preference option value to Yes This means that the local NTP client prefers accepts packets from the remote server and synchronizes its internal clock to this server 304234 A Rev 00 Customizing NTP Services Complete the tasks in the following table to specify whether the local NTP client will prefer or reject NTP packets from the rem
187. ts described in Chapter 2 After you start Telnet services on the router default values are in effect for all Telnet configuration parameters You may want to change these parameter values depending on the requirements of your network Topic Page Configuring Telnet Using the BCC or Site Manager 6 2 Customizing the Telnet Configuration 6 3 Customizing the Telnet Server on the Router 6 6 Configuring a Telnet Client on the Router 6 20 304234 A 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 the 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 S S Pausing Telnet Console Output Changing the Telnet Login Prompt Changing the Login Timeout Changing the Password Timeout Changing the Command Timeout Changing Login Retries SISISINSINSIS Using Telnet Server Diagnostics Changing the History File S Disabling and Reenabling a Telnet Client on the IP
188. ts the 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 retransmitting unacknowledged data 304234 A Rev 00 Configuring IP Utilities 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 and enter min rto lt integer gt integer is a value from 100 to 15 000 milliseconds ms For example the following command sets the value for the minimum retransmission timeout to 300 ms tcp min rto 300 tcp Note When specifying a value for the Minimum Retransmission Timeout parameter do not use a comma in the value Using Site Manager Complete the tasks in the following table to specify a value for the minimum retransmission timeout Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens Choose Global Protoc
189. und Enable Broadcasts Rebroadcast Address Null 304234 A Rev 00 B 5 Configuring IP Utilities Table B 10 lists the Site Manager default settings for NetBIOS IP static entry table parameters Table B 10 NetBIOS IP Static Entry Table Parameters Parameter Default Enable Enable NetBIOS Scope ID None NetBIOS Station Name None NetBIOS Scope ID None IP Accounting Parameters Table B 11 lists the Site Manager default parameter settings for IP Accounting Table B 11 IP Accounting Parameters Parameter Default Enable Enable Threshold 512 entries Trap Percent 80 percent IP Accounting Checkpoint Flag 0 DNS Client Parameters Table B 12 lists the Site Manager default parameter settings for the DNS client Table B 12 DNS Client Parameters Parameter Default Enable Enable Time Out 5 Max Retransmissions 3 Max Outstanding Query 20 IP Type of Service Low Delay continued B 6 304234 A Rev 00 Table B 12 DNS Client Parameters continued Site Manager Default Settings Parameter Default Domain Name None Recursion Enable Ignore Truncation Error Disable Use Auth Answer Only Disable Use Default Domain name Enable DNS Server Parameters Table B 13 lists the Site Manager default parameter settings for the DNS server Table B 13 DNS server Parameters Parameter Default I
190. uration 9 3 Disabling the Recursion Bit 95 Modifying How the DNS Client Handles Server Responses 9 6 Modifying the DNS Server List 9 7 Disabling or Reenabling DNS on the Router 9 11 Deleting DNS from the Router 9 12 Disabling and Reenabling the DNS Client After you configure IP and start DNS all DNS default parameter values are automatically enabled on the router If you disable DNS it is no longer available on any IP circuit Using the BCC To disable DNS on the router navigate to the dns prompt and enter disable 304234 A Rev 00 9 1 Configuring IP Utilities For example the following command line disables the DNS client on the router dns disable dns To reenable the DNS client navigate to the dns prompt and enter enable For example this command line reenables the DNS client on the router dns enable dns dns info state enabled Using Site Manager Complete the tasks in the following table to disable and reenable the DNS client on the router 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 DNS 4 Choose Global The DNS menu opens The Edit DNS Global Parameters window opens Set the Enable parameter Click on Help or see the parameter description on page A 28 Click on OK Site
191. use 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 successors 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 Bay Networks of any such intended examination of the Software and may procure support and assistance from Bay Networks 7 Term and termination This license is effective until terminated however all of the restrictions with respect to Bay Networks copyright in the Software and user manuals will cease being effective at the date of expiration of the Bay Networks copyright those restrictions relating to use and disclosure of Bay 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 Bay Networks the Software user
192. ut Configuration Manager gt Protocols gt IP gt TFTP 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 304234 A Rev 00 A 7 Configuring IP Utilities Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Close Time Out Configuration Manager gt Protocols gt IP gt TFTP 25 Any number of seconds Specifies the number of seconds 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 5 Any number of retransmissions Specifies the number of times 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 Enable
193. vides information about how to customize the DNS proxy configuration Modifying the DNS Proxy Configuration You can modify how the DNS proxy on the router makes requests to the DNS server for example how often requests the DNS proxy repeats requests and how long it waits between requests To modify how the router sends DNS requests complete the following tasks Site Manager Procedure You do this 1 In the Configuration Manager window choose Protocols System responds The Protocols menu opens 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 continued 304234 A Rev 00 10 1 Configuring IP Utilities Site Manager Procedure continued You do this System responds 5 Edit one or more of the following parameters Enable Disable Proxy Mode e Proxy Listen Port Number DNS Server 1 DNS Server 2 DNS Server 3 DNS Server Port Number Timeout in secs Max Retransmissions Max Outstanding Req Answer Truncation Trunc Max Allowed Cache Size Click on Help or see the parameter descriptions beginning on page A 38 Click on OK You return to the Configuration Manager window 10 2 304234 A Rev 00 Appendix A Site Manager Parameters This appendix contains the Site Manager parameter descriptions
194. w clients By default the DNS proxy listens on UDP port 53 standard DNS server port for the IP interface on which it 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 Once the DNS proxy server receives a response from the DNS server the DNS proxy forwards the packet to the requesting client and puts the response into 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 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 304234 A Rev 00 2 25 Configuring IP Utilities How the DNS 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 c
195. workmanship under normal use for a period of 90 days from the date Software is first shipped to Licensee Bay Networks will replace defective media at no charge if it is returned to Bay Networks during the warranty period along with proof of the date of shipment This warranty does 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 Bay 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 Bay 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 Bay 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 L
196. xy Server Works Clients on a LAN typically use DNS servers to resolve a host name to an IP address For example a client might request the service www baynetworks com Since 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 not every client 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 ne
197. ynchronize 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 304234 A 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 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 Bay 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 unica

Avaya Configuring IP Utilities User's Manual

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