Avaya Configuring TCP Services User's Manual
Contents
1. Chapter 1 Transmission Control Protocol Overview In the 1970s the Defense Advanced Research Projects Agency DARPA of the U S Department of Defense 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 This chapter introduces TCP concepts features and terminology and consists of the following sections e Reliability e Connection Types e Connections and Connection States e TCP and IP Service Users e Telnet e File Transfer Protocol Reliability Since IP does not always guarantee reliable transfer of data TCP implements several features to ensure that data arrives at its destination uncorrupted and in the order sent These features include e Sequence numbers TCP assigns a sequence number to each data segment it transmits The receiving host uses the sequence numbers to make sure that all the data arrives in order Configuring TCP Services e 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 does not 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 segments2. 21 Login Timeout min parameter 3 11 Manager s Login Script parameter 3 7 3 14 Max Retransmission Timeout parameter 3 5 Index 1 Max Sessions parameter 3 21 Max Window Size parameter 3 6 memory and number of Telnet connections 1 5 considerations for configuring TCP 2 1 Min Retransmission Timeout parameter 3 5 O outbound Telnet 1 5 3 16 See also Telnet client out of order caching 1 2 P Parameters See individual names Password Timeout parameter 3 11 ports 1 3 Prompt parameter 3 18 R reference material 1 8 Remote Port parameter 3 18 S sequence numbers 1 1 Simple Network Management Protocol SNMP 1 5 sockets 1 3 T TCP clients 1 2 1 4 connection states 1 3 to 1 4 connections for 1 2 creating 3 2 deleting from the router 3 6 editing parameters for 3 3 memory considerations 2 1 overview of 1 1 to 1 4 ports 1 3 TCP global parameters 3 4 to 3 6 descriptions of 3 4 to 3 6 editing 3 3 Enable Disable 3 4 Max Retransmission Timeout 3 5 Max Window Size 2 1 3 6 Min Retransmission Timeout 3 5 TCP Window Size parameter 3 23 Technician Interface 1 5 Telnet 1 4 to 1 5 Telnet client 1 4 command prompt 3 18 creating 3 16 deleting from the router 3 18 editing parameters for 3 16 to 3 17 parameter descriptions for 3 17 to 3 18 Telnet client global parameters 3 17 to 3 18 editing 3 16 to 3 17 Enable Disable 3 17 Prompt 3 18 Remo
3. 4 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 Service Binary Control Connection Low delay Data Transfer High Throughput TCP Window Size 16000 bytes A 3 A acknowledgment with retransmission 1 2 C caching 1 2 checksums 1 2 clients 1 2 1 4 Command Timeout parameter 3 12 Configuration Manager window 3 2 connections 1 2 Control Connection parameter 3 22 D Data Transfer parameter 3 22 Default Volume parameter 3 20 Diagnostic Exercise parameter 3 13 Diagnostic Network Data parameter 3 13 Diagnostic Options parameter 3 14 Diagnostic PTY Data parameter 3 13 Diagnostic Report parameter 3 12 E Edit TCP Global Parameters window 3 4 Edit Telnet Server Global Parameters window 3 9 Enable Disable 3 17 Enable Disable parameter 3 4 3 10 3 20 Index F File Transfer Protocol FTP 1 5 flow control 1 2 1 4 Force User Logout parameter 3 8 3 15 FTP global parameters Control Connection 3 22 Data Transfer 3 22 Default Volume 3 20 Enable Disable 3 20 Idle Time Out 3 21 Login Retries 3 21 Max Sessions 3 21 TCP Window Size 3 23 Type of Service 3 22 Idle Time Out parameter 3 21 Inbound Telnet 1 5 3 6 See also Telnet server Internet Protocol IP 1 1 L Login Retries parameter 3 12 3
4. 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 refer to Using Technician Interface Software Caution The Technician Interface does not verify that the value you enter for a parameter is valid Entering an invalid value can corrupt your configuration To enable IP on the router see Configuring IP Services To configure and customize TCP on the router see the following sections e Creating TCP e Editing TCP Global Parameters e Deleting TCP from the Router To configure and customize Telnet on the router see the following sections e Creating a Telnet Server e Editing Telnet Server Global Parameters e Deleting a Telnet Server from the Router 3 1 Configuring TCP Services e Creating a Telnet Client e Editing Telnet Client Global Parameters e Deleting a Telnet Client from the Router To configure and customize FTP on the router see the following sections e Creating an FTP Server e Editing FTP Global Parameters e Deleting the FTP Server from the Router Note These instructions assume that you have already configured IP on the router If you did not configure IP see Configuring Routers or Configuring Customer Access and Trunks BNX Software depending on the type of installed software Configuring and Customizing TCP Use Site Man
5. Manager default settings listed here TCP Parameters Table A 1 lists the Site Manager default parameter settings for the Transmission Control Protocol TCP Table A 1 TCP Configuration Parameters Parameter Default Enable Disable Enable Min Retransmission Timeout 250 ms Max Retransmission Timeout 240000 ms Max Window Size 4096 bytes A 1 Configuring TCP Services Telnet Parameters Tables A 2 and A 3 list the Site Manager default parameter settings for Telnet Table A 2 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 Manager s Login Script automgr bat User s Login Script autouser bat Force User Logout Disable TI History Depth 20 commands Table A 3 Telnet Client Configuration Parameters Parameters Default Enable Disable Enable Verbose Debug Logging OFF Remote Port 23 Prompt None Site Manager Default Settings FTP Parameters Table A 4 lists the Site Manager default parameter settings for the File Transfer Protocol FTP Table A
6. grant any Software license whatsoever either explicitly or implicitly except by acceptance of an order for either Software or for a Bay Networks product Equipment that is packaged with Software Each such license is subject to the following restrictions 1 Upon delivery of the Software Bay Networks grants to licensee a personal nontransferable nonexclusive license to use the Software with the Equipment with which or for which it was originally acquired including use at any of licensee s facilities to which the Equipment may be transferred for the useful life of the Equipment unless earlier terminated by default or cancellation Use of the Software shall be limited to such Equipment and to such facility Software which is licensed for use on hardware not offered by Bay Networks is not subject to restricted use on any Equipment however unless otherwise specified on the Documentation each licensed copy of such Software may only be installed on one hardware item at any time Licensee may use the Software with backup Equipment only if the Equipment with which or for which it was acquired is inoperative Licensee may make a single copy of the Software but not firmware for safekeeping archives or backup purposes Licensee may modify Software but not firmware or combine it with other software subject to the provision that those portions of the resulting software which incorporate Software are subject to the restrictions of this
7. its destination For information on creating TCP on the router and editing TCP parameters refer to Configuring and Customizing TCP in Chapter 3 1 4 Telnet Transmission Control Protocol Overview Telnet allows you 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 To use Telnet to access the Technician Interface you must assign at least one IP address to the router The number of Telnet connections you can make to the Technician Interface is limited only by the availability of system resources that is system memory Note We recommend that you establish no more than one Telnet session per router For information on creating Telnet on the router and editing Telnet parameters refer to Configuring and Customizing the Telnet Server and Configuring and Customizing the Telnet Client in Chapter 3 For complete information about accessing and using the Technician Interface with Telnet see Using Technician Interface Software File Transfer Protocol The File Transfer Protocol FTP allows you to e Download files from your host system to a remote router and retrieve files from the router e E
8. license Licensee shall not make the resulting software available for use by any third party Neither title nor ownership to Software passes to licensee Licensee shall not provide or otherwise make available any Software in whole or in part in any form to any third party Third parties do not include consultants subcontractors or agents of licensee who have licensee s permission to use the Software at licensee s facility and who have agreed in writing to use the Software only in accordance with the restrictions of this license Third party owners from whom Bay Networks has acquired license rights to software that is incorporated into Bay Networks products shall have the right to enforce the provisions of this license against licensee Licensee shall not remove or obscure any copyright patent trademark trade secret or similar intellectual property or restricted rights notice within or affixed to any Software and shall reproduce and affix such notice on any backup copy of Software or copies of software resulting from modification or combination performed by licensee as permitted by this license Bay Networks Inc 4401 Great America Parkway Santa Clara CA 95054 8 Federal Street Billerica MA 01821 Bay Networks Software License continued 10 11 12 Licensee shall not reverse assemble reverse compile or in any way reverse engineer the Software Note For licensees in the European Community the Software Dire
9. 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 3 15 Configuring TCP Services Deleting a Telnet Server from the Router To delete a Telnet Server from the entire router follow these steps 1 Select Protocols gt Global Protocols gt Telnet Server gt Delete Telnet Server in the Configuration Manager window refer to Figure 3 1 Site Manager asks Do you REALLY want to delete Telnet Server 2 Click on OK to delete the Telnet Server Configuring and Customizing the Telnet Client You use the Telnet Client to establish outbound Telnet sessions Use Site Manager to create the Telnet Client edit Telnet Client parameters and delete the Telnet Client from the router Creating a Telnet Client To create a Telnet Client on the router for outbound Telnet sessions select Protocols Global Protocols gt Telnet Client gt Create Telnet Client from the Configuration Manager window refer to Figure 3 1 Editing Telnet Client Global Parameters To edit Telnet Client global parameters follow these steps 1 Select Protocols gt Global Protocols gt Telnet Client gt Global from the Configuration Manager window refer to Figure 3 1 The Edit Telnet Client Global Parameters window appears refer to Figure 3 5 3 16 Editing
10. 8 Sydney Australia 61 2 903 5800 Tokyo Japan 81 3 328 005 Conventions This section describes the conventions used in this guide angle brackets lt gt 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 command syntax is ping lt ip_address gt you enter ping 192 32 10 12 xiv arrow character gt bold text brackets italic text quotation marks screen text ellipsis points vertical line l About This Guide Separates menu and option names in instructions Example Protocols AppleTalk identifies the AppleTalk option in the Protocols menu Indicates text that you need to enter and command names in text Example Use the dinfo command Indicate optional elements You can choose none one or all of the options Indicates variable values in command syntax descriptions new terms file and directory names and book titles Indicate the title of a chapter or section within a book Indicates data that appears on the screen Example set Bay Networks Trap Monitor Filters Horizontal and vertical ellipsis points indicate omitted information Indicates that you enter only one of the parts of the command The vertical line separates choices Do not type the vertical line when entering the command Example If the command syntax is show at routes nets you enter
11. CP 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 Transmission Control Protocol Overview 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 1 1 lists the states through which a TCP connection proceeds during its lifetime Table 1 1 TCP Connection States State Definition LISTEN 2 TCP listens for a connection request from any remote TCP SYN SENT 3 TCP sent a connection request SYN segment and waits for a matching connection request and acknowledgment from the remote TCP SYNRECEIVED 4 TCP sent a connection request received a matching request and waits for a confirming connection request acknowledgment from the remote TCP ESTABLISHED 5 Connection open Data can be received and sent This is the normal state for the data transfer phase of the connection FINWAIT 1 6 TCP waits for a connection termination request FIN segment from the remote TCP or for an acknowledgment of a previously sent connection termination request FINWAIT 2 7 TCP waits for a connection te
12. Configuring TCP Services Router Software Version 10 0 Site Manager Software Version 4 0 Software Version BNX 6 0 Site Manager Software Version BNX 6 0 Part No 112925 Rev A January 1996 a Bay Networks Bay Networks 4401 Great America Parkway 8 Federal Street Santa Clara CA 95054 Billerica MA 01821 Copyright 1988 1996 Bay Networks Inc All rights reserved Printed in the USA January 1996 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 Restricted Rights Legend Use duplication or disclosure by the United States Government is subject to restrictions as set forth in subparagraph c 1 Gi of the Rights in Technical Data and Computer Software clause at DFARS 252 227 7013 Notice for All Other Executive Agencies Notwithstanding any other license agreement that may pertain to or accompany the delivery of this computer software the rights
13. Edit TCP Global Parameters window refer to Figure 3 2 Parameter Enable Disable Default Enable Options Enable Disable Function Enables or disables TCP on the router Instructions Select Disable to disconnect from TCP Also you can select Disable if you do not need TCP but want to access previous TCP statistics MIB Object ID 1 3 6 1 4 1 18 3 5 3 3 1 2 3 4 Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Editing TCP Telnet and FTP Parameters Min Retransmission Timeout msec 250 milliseconds msec 100 to 15000 msec 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 Min Retransmission Timeout 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 Max Retransmission Timeout msec 240000 msec 15000 to 240000 msec Sets the maximum value for the retransmission timeout When one side of a TCP connection sends a frame and does not receive an acknowledgment fro
14. Global from the Configuration Manager window refer to Figure 3 1 The Edit FTP Global Parameters window appears refer to Figure 3 6 Edit FTP Global Parameters Enable Disable Default Volume Login Retries Idle Time Out secs Max Sessions Type of Service Control Connection LOWDELAY Data Transfer HIGHTHROUGHPUT TCP Window Size Figure 3 6 Edit FTP Global Parameters Window 3 19 Configuring TCP Services 2 Edit the parameters in this window using the descriptions in the next section as a guide 3 Click on OK to save your changes and exit the window FTP Global Parameter Descriptions Use the following descriptions as a guide when you configure the parameters in the Edit FTP Global Parameters window Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Enable Disable Enable Enable Disable Specifies whether the FTP subsystem is enabled or disabled Specify Disabled if you want to disable FTP on the router 1 3 6 1 4 1 18 3 5 3 10 1 2 Default Volume Volume 2 Volume to 13 Volume A Specifies the 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 3 20 Parameter Default Options Function Instructions MIB Object ID Paramet
15. TCP Telnet and FTP Parameters Edit Telnet Client Global Parameters Enable Disable ENABLER Verbose Debug Logging OFF Remote Port 23 Prompt Figure 3 5 Edit Telnet Client Global Parameters Window 2 Edit the parameters in this window using the descriptions in the next section as a guide 3 Click on OK to save your changes and exit the window Telnet Client Global Parameter Descriptions Use the descriptions in this section as a guide when you configure the parameters in the Edit Telnet Client Global Parameters window refer to Figure 3 5 Parameter Enable Disable Default Enable Options Enable Disable Function 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 Instructions Select Enable to enable Telnet Client for the IP router or Disable to disable it MIB Object ID 1 3 6 1 4 1 18 3 5 3 7 2 2 3 17 Configuring TCP Services Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Verbose Debug Logging OFF ON OFF Specifies whether the Technician Interface displays the negotiation process between the Telnet Server and Telnet Client This parameter is for diagn
16. ager to create TCP edit TCP parameters and delete TCP from the router Creating TCP To create TCP on the router select Protocols Global Protocols gt TCPCreate TCP from the Configuration Manager window refer to Figure 3 1 3 2 Editing TCP Telnet and FTP Parameters ee ey eee Configuration Moie Local LOCAL FILE p AOpen Lech mary a bcp Eachin Lirik Mode BLH HIH Version ep DI Color Key Used reer Description Doniec bors SA50 ua Etherpet Empty Sloe Empty Slot Empty Slot System Resource Rodale Figure 3 1 Configuration Manager Window Editing TCP Global Parameters To edit TCP global parameters follow these steps 1 Select Protocols gt Global Protocols gt TCP gt Global from the Configuration Manager window The Edit TCP Global Parameters window appears refer to Figure 3 2 3 3 Configuring TCP Services Edit TCP Global Parameters Cancel Dk V S elp Enable Disable ENABLE Min Retransmission Timeout usec 3 Max Retransmission Timeout usec 3 Max Window Size bytes Figure 3 2 Edit TCP Global Parameters Window 2 Edit the parameters in this window using the guidelines in the next section 3 Click on OK to save your changes and exit the window If you want to delete TCP go to Deleting TCP from the Router TCP Global Parameter Descriptions Use the following descriptions as a guide when you configure the parameters in the
17. ce Statistics Frame Relay switching and Frame Relay billing and selected components from the Corporate ARE ATM and ARE VNR Corporate suites Availability of features and functionality described in this guide depends on the suites you are using Written for system and network managers this guide describes how to configure the Bay Networks implementation of TCP services to suit your environment Before You Begin Before using this guide you must complete the following procedures e Create and save a configuration file that has at least one IP interface e Retrieve the configuration file in local remote or dynamic mode Refer to Configuring Routers or Configuring Customer Access and Trunks BNX Software depending on the type of installed software for instructions Bay Networks Customer Support Bay Networks provides live telephone technical support to our distributors resellers and service contracted customers from two U S and three international support centers If you have purchased your Bay Networks product from a distributor or authorized reseller contact the technical support staff of that distributor or reseller for assistance with installation configuration troubleshooting or integration issues Customers also have the option of purchasing direct support from Bay Networks through a variety of service programs The programs include priority access telephone support on site engineering assistance software subscripti
18. ctive dated 14 May 1991 as may be amended from time to time shall apply for interoperability purposes Licensee must notify Bay Networks in writing of any such intended examination of the Software and Bay Networks may provide review and assistance Notwithstanding any foregoing terms to the contrary if licensee licenses the Bay Networks product Site Manager licensee may duplicate and install the Site Manager product as specified in the Documentation This right is granted solely as necessary for use of Site Manager on hardware installed with licensee s network This license will automatically terminate upon improper handling of Software such as by disclosure or Bay Networks may terminate this license by written notice to licensee if licensee fails to comply with any of the material provisions of this license and fails to cure such failure within thirty 30 days after the receipt of written notice from Bay Networks Upon termination of this license licensee shall discontinue all use of the Software and return the Software and Documentation including all copies to Bay Networks Licensee s obligations under this license shall survive expiration or termination of this license Bay Networks Inc 4401 Great America Parkway Santa Clara CA 95054 8 Federal Street Billerica MA 01821 Contents About This Guide Software SUES cit nti ee ain ieee eae xi Audience zeeen creer E xii BETOreYOUBOGIN TEE xii Bay Networks Customer Sup
19. delete command 1 7 Configuring TCP Services As network administrator you use Site Manager to create the FTP server on the router and edit FTP server parameters For complete information and instructions refer to Configuring and Customizing the FTP Server in Chapter 3 For More Information about TCP If you would like more information about the Transmission Control Protocol refer to Comer Douglas E Internetworking with TCP IP Volume I Principles Protocols and Architecture Englewood Cliffs New Jersey Prentice Hall Inc Second Edition 1991 1 8 Chapter 2 TCP Implementation Notes This chapter contains specific implementation notes to keep in mind when you configure Bay Networks TCP services Memory Considerations The Transmission Control Protocol requires a significant amount of memory to e Retain copies of outbound data in case they must be retransmitted e Retain copies of inbound data in case they are received out of order and must be rearranged e Manage the TCP connections The amount of memory used per TCP connection is dynamic Each connection uses a small amount of overhead memory less than 1 KB even if the connection is idle As the size of the transmit and receive window increases so does the memory for connections It expands as much as TCP allows You can control the window size by setting a value for the Max Window Size parameter in the Edit TCP Global Parameters window see C
20. e 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 3 10 Editing TCP Telnet and FTP Parameters Caution Site Manager disconnects the current session if you modify the TI Prompt parameter Parameter TI Prompt Default None Range 1 to 18 alphanumeric characters Function Specifies the character string used as the login prompt on the Telnet Technician Interface console screen Instructions Specify a character string MIB Object ID Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID 1 3 6 1 4 1 18 3 5 3 7 1 5 Login Timeout min 1 minute 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 1 minute 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 Con
21. either show at routes or show at nets but not both Ordering Bay Networks Publications To purchase additional copies of this document or other Bay Networks publications order by part number from Bay Networks Press at the following numbers You may also request a free catalog of Bay Networks Press product publications Phone FAX U S Canada FAX International 1 800 845 9523 1 800 582 8000 1 916 939 1010 XV Configuring TCP Services Acronyms ANSI ARP ATM BGP CMIP DLSw EGP FDDI FTP IEEE ILI IP MAC MOP OSI OSPF PVCs QENET RIP SMDS SNAP SNMP SRM SVCs TCP TCP IP TFTP American National Standards Institute Address Resolution Protocol Asynchronous Transfer Mode Border Gateway Protocol Common Management Information Protocol data link switching Exterior Gateway Protocol Fiber Distributed Data Interface File Transfer Protocol Institute of Electrical and Electronic Engineers intelligent link interface Internet Protocol Media Access Control Maintenance Operations Protocol Open Systems Interconnection Open Shortest Path First permanent virtual circuits Quad Ethernet Link Module Routing Information Protocol Switched Multimegabit Data Services Subnetwork Access Protocol Simple Network Management Protocol system resource modules switched virtual circuits Transmission Control Protocol Transmission Control Protocol Internet Protocol Trivial File Transfer Protocol xvi
22. endix A Site Manager Default Settings GP e TEE EE A 1 Telnet Parameters ee ege A hee ee A 2 FTP Parameters sesona iiaea AN eE ANADA Wd in AE ed A 3 Index vi Figures Figure 1 1 TCP between IP and Clients ccceceeceeeeeeeeeeeeeeeeeeeeaeeeeeeeesaaeeteneees 1 4 Figure 1 2 FTP Client and Server cececeeesceeeeeeeeeeeeeeecaeeeeeaeeseceeeesaeesecueeeenaaeeee 1 6 Figure 3 1 Configuration Manager Window ssssssssssssisssrssssrsseirssirssrnessrissrrnssrrnssrns 3 3 Figure 3 2 Edit TCP Global Parameters WindOW c escceeeeeeeeeeeeeteeeeeeeeaeeneneeees 3 4 Figure 3 3 Telnet Configuration Window ccseseceeeceeeeeeeeeeeceeeeeaee secures eaaeeeeneeees 3 7 Figure 3 4 Edit Telnet Server Global Parameters Window cccceeeeteeeeeeeeneees 3 9 Figure 3 5 Edit Telnet Client Global Parameters Window ssceeeeceeeeteeeeeees 3 17 Figure 3 6 Edit FTP Global Parameters Window vii Tables Table 1 1 TCP Connection States srecni aea en a a e aa ae 1 3 Table 1 2 FTP Commands Supported by the FTP Server osasse 1 7 Table A 1 TCP Configuration Parameters ccccccceeceeeeeeeseeeeeaeeeseeeeeeeeeeetaeeesaes A 1 Table A 2 Telnet Server Configuration Parameters ccsceeseeeeeseseeeeeeeeeeesaeeseaes A 2 Table A 3 Telnet Client Configuration Parameters cccsceeeseeeeeeseeeeeeeeeeetaeeeeees A 2 Table A 4 FTP Configuration Parameters esssseessse
23. er Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Editing TCP Telnet and FTP Parameters Login Retries 3 retries 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 Idle Time Out secs 900 seconds 1 to 9999 seconds Specifies the length of time in seconds that FTP waits before closing an idle FTP control connection Determine the maximum idle time 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 3 sessions 1 to 10000 sessions Specifies the maximum number of FTP sessions allowed at one time Determine the maximum number of simultaneous sessions you want to allow and specify a value 1 3 6 1 4 1 18 3 5 3 10 1 6 3 21 Configuring TCP Services Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Type of Service Binary Binary ASCII Specifies the current data transmission type To transfer files consisting of ASCII characters specify ASCII transmission For non ASCII files specify Binar
24. erials related to such distribution and use acknowledge that such portions of the software were developed by the University of California Berkeley The name of the University may not be used to endorse or promote products derived from such portions of the software without specific prior written permission SUCH PORTIONS OF THE SOFTWARE ARE PROVIDED AS IS AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES INCLUDING WITHOUT LIMITATION THE IMPLIED 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 Bay Networks Software License Note This is Bay Networks basic license document In the absence of a software license agreement specifying varying terms this license or the license included with the particular product shall govern licensee s use of Bay Networks software This Software License shall govern the licensing of all software provided to licensee by Bay Networks Software Bay Networks will provide licensee with Software in machine readable form and related documentation Documentation The Software provided under this license is proprietary to Bay Networks and to third parties from whom Bay Networks has acquired license rights Bay Networks will not
25. esssseseeesrisssirssrrrssirnssrnsstnnssnnnnt A 3 About This Guide If you are responsible for configuring and managing Bay Networks routers or BNX platforms read this guide to discover how to customize Bay Networks router software for Transmission Control Protocol TCP services Configuring TCP Services offers An overview of TCP see Chapter 1 Implementation notes that may affect how you configure TCP services see Chapter 2 Instructions on editing TCP Telnet and FTP parameters see Chapter 3 Software Suites Routing and Switching software is available in the following suites The System Suite includes IP routing 802 1 Transparent Bridge Source Route Bridge Translation Bridge SNMP Agent Bay Networks HDLC PPP OSPF EGP BGP and basic DLSw The LAN Suite includes DECnet Phase 4 AppleTalk Phase 2 OSI VINES IPX and ATM DXI in addition to the System Suite The WAN Suite includes ATM DXI Frame Relay LAPB and X 25 in addition to the System Suite The Corporate Suite includes the System LAN and WAN suites in their entirety The ARE ATM Suite provides RFC 1483 and 1577 compliance ATM UNI 3 0 signaling in addition to the LAN Suite The ARE VNR Corporate Suite provides ATM Forum LAN Emulation in addition to the ARE ATM Suite and Corporate Suite xi Configuring TCP Services Audience e The BNX Suite includes IP Routing SNMP Agent Bay Networks HDLC PPP OSPF EGP BGP File Based Performan
26. f you did not change the name of the manager s login script file accept the default Otherwise enter the new name must be eight characters or less 1 3 6 1 4 1 18 3 5 3 7 1 21 User s Login Script 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 eight characters or less 1 3 6 1 4 1 18 3 5 3 7 1 22 3 14 Parameter Default Options Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Editing TCP Telnet and FTP Parameters Force User Logout 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 Use the default Disable if you want users to access the Technician Interface Set to Enable if you want users to enter the Telnet logout command 1 3 6 1 4 1 18 3 5 3 7 1 23 TI History Depth 20 commands 1 to 40 commands Specifies the maximum number of Technician Interface commands stored in the local command history table The table stores each command
27. figuring TCP Services Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Command Timeout min 15 minutes 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 3 login attempts 1 to 99 login attempts Specifies the maximum number of login attempts you can make 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 Disable Enable Disable Specifies whether the Technician Interface displays a record of all 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 3 12 Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Editing TCP Telnet and FTP Parameters Diagnostic Exercise Disab
28. hapter 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 The value you set for Max 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 Max Window Size value 2 1 Configuring TCP Services 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 the connections consuming the most memory and break those first to maintain connections consuming less memory Chapter 3 Editing TCP Telnet and FTP Parameters Once you enable IP on your router you can use Site Manager to create TCP Telnet and FTP on the router and customize TCP Telnet and FTP parameters For each TCP Telnet and FTP parameter this manual provides default settings valid parameter options the parameter function instructions for setting the parameter and the Management Information Base MIB object ID The Technician Interface lets you modify parameters by issuing set and commit commands that specify the
29. ing and Customizing the Telnet Server o eee eeceeseeeeeeneseeeecseetsaeeseesneeenaes 3 6 Creating a Telnet Server EE 3 6 Telnet Configuration Parameter Descriptions ceeeeeeeeceeeeeeeeceeeeeeeeeeaaeeeeneees 3 7 Editing Telnet Server Global Parameters 200 eecceecceseceeeeeeseneeesaeeneetneeeeneeeeeeee 3 8 Telnet Server Global Parameter Descriptions cccceeeseeeceeeeeeeeceeeeeeeeeseaaeeneeeees 3 9 Deleting a Telnet Server from the Router sssssssssseesrsssirssrrsssrrssrrsrnrsnnnrenesrnne 3 16 Configuring and Customizing the Telnet Client ccccccseeeeeeeeeeeeeeeeeeeeeeseaeeeeeeeeteas 3 16 Creating sa Telnet Cle nt Masirana ae a aaaea Det ceed dent eebe a aaant 3 16 Editing Telnet Client Global Parameters cccececceeeseeeceeeeeeeeaeeeeeeeeeseaeeeseeeeeeas 3 16 Telnet Client Global Parameter Descriptions 3 17 Deleting a Telnet Client from the Router ccccceeeeceeeeeeeeeeeeeeeeaeeeeeeeeesaeeeteneeeeaas 3 18 Configuring and Customizing the FTP Server eeseeesee eee eeeeseeeeeeeteeeseneeneaeeenaees 3 19 Creating am FIP SOnver een EENEG gedet ied ee a aaae a aaa 3 19 Editing FTP Global Parameters cc cccccecceeeseeeeeeeeeeeeaeeceeeeeeeaeeeeeneesenaeeeseeeeeaas 3 19 FTP Global Parameter Descriptions cccccceeceeeeeeeeeeeeeceeeeeeeaeeeeeneeesaeeeseaeeesaas 3 20 Deleting the FTP Server from the Router cceeseceeeeteeceeeeeeeeeeeeeeneeesaeeeteeeeeaas 3 23 App
30. it takes the stored segments from cache memory puts them into sequential order with the newly received segments and then forwards them to the receiving TCP client Out of order caching ensures that data arrives in the correct order while saving bandwidth and retransmission time e 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 e 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 e Acknowledgment with retransmission TCP requires the receiving host to acknowledge that it has 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 Connection Types TCP allows both active and passive connections or opens For passive opens a TCP client the process or program that uses T
31. le 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 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 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 3 13 Configuring TCP Services Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Diagnostic Options 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 automgr bat The name of the manager s login script file At login executes the manager s login script file automatically I
32. m the other side of the connection within the timeout period the sending station retransmits the frame Specify the value you want to use for the maximum timeout period If you are transmitting on a low speed network and you set the Max Retransmission Timeout 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 3 5 Configuring TCP Services Parameter Max Window Size bytes Default 4096 bytes Range 512 to 65535 bytes Function Sets the maximum transmit and receive window size that TCP allows for each connection Instructions Specify the window size The larger the window size the more memory each TCP connection consumes MIB Object ID 1 3 6 1 4 1 18 3 5 3 3 1 18 Deleting TCP from the Router Caution The system automatically deletes Telnet and BGP from the router when you delete TCP To delete TCP from the router follow these steps 1 Select Protocols gt Global Protocols gt TCP gt Delete TCP from the Configuration Manager window refer to Figure 3 1 Site Manager asks Do you REALLY want to delete TCP 2 Click on OK to delete TCP Configuring and Customizing the Telnet Server You use the Telnet Server to establish inbound Telnet sessions The following sections describe how to create the Telnet Server using Site Manager edit Telnet Server parameters and delete the Telnet Server from the ro
33. nostic Report Diagnostic Exercise Figure 3 4 Edit Telnet Server Global Parameters Window 2 Edit the parameters in this window using the guidelines in the next section 3 Click on OK to save your changes and exit the window Telnet Server Global Parameter Descriptions Use the following descriptions as a guide when you configure the parameters in the Edit Telnet Server Global Parameters window 3 9 Configuring TCP Services Parameter Default Options Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Enable Disable Enable Enable Disable Specifies whether Telnet is enabled for the IP router allowing you to establish 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 TI Lines per Screen 24 lines 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 Enable Enable Disable Specifies whether the Technician Interface pauses after each screen fills with data Select Enabl
34. ns MIB Object ID User s Login Script 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 eight characters or less 1 3 6 1 4 1 18 3 5 3 7 1 22 Force User Logout 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 Select Enable to prevent using control c to cancel the user autoscript at login Select Disable to allow the user to press control c to cancel the user autoscript at login Use the default Disable if you want users to access the Technician Interface Set to Enable if you want users to enter the Telnet logout command 1 3 6 1 4 1 18 3 5 3 7 1 23 Editing Telnet Server Global Parameters To edit Telnet Server global parameters follow these steps 1 Select Protocols gt Global Protocols gt Telnet Server gt Global from the Configuration Manager window refer to Figure 3 1 The Edit Telnet Server Global Parameters window appears refer to Figure 3 4 3 8 Editing TCP Telnet and FTP Parameters Edit Telnet Server Global Parameters Enable Disable ENABLER TI Lines per Screen 24 TI More ENABLE TI Prompt Login Timeout min Password Timeout min Command Timeout min Login Retries Diag
35. 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 Trademarks of Bay Networks Inc ACE AFN BCN BLN BN CN FRE LN Optivity SynOptics SynOptics Communications Wellfleet and the Wellfleet logo are registered trademarks and AN ANH ASN BaySIS BayStack BCNX BLNX BNX EZ Internetwork EZ LAN FN PathMan PhonePlus PPX Quick2Config RouterMan SPEX Bay Networks Bay Networks Press the Bay Networks logo and the SynOptics logo are trademarks of Bay Networks Inc Third Party Trademarks All other trademarks and registered trademarks are the property of their respective owners 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 are 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 mat
36. on hardware replacement and other programs designed to protect your investment xii About This Guide To purchase any of these support programs including PhonePlus for 24 hour telephone technical support call 1 800 2LANWAN Outside the U S and Canada call 408 764 1000 You can also receive information on support programs from your local Bay Networks field sales office or purchase Bay Networks support directly from your reseller Bay Networks provides several methods of receiving support and information on a nonpriority basis through the following automated systems CompuServe Bay Networks maintains an active forum on CompuServe All you need to join us online is a computer a modem and a CompuServe account We also recommend using the CompuServe Information Manager software available from CompuServe The Bay Networks forum contains libraries of technical and product documents designed to help you manage and troubleshoot your Bay Networks products Software agents and patches are available and the message boards are monitored by technical staff and can be a source for problem solving and shared experiences Customers and resellers holding Bay Networks service contracts can visit the special libraries to acquire advanced levels of support documentation and software To open an account and receive a local dial up number call CompuServe at 1 800 524 3388 and ask for Representative No 591 e Inthe United Kingdom call F
37. ostic 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 Remote Port 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 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 Deleting a Telnet Client from the Router To delete a Telnet Client from the entire router follow these steps 1 Select Protocols gt Global Protocols gt Telnet Client gt Delete Telnet Client in the Configuration Manager window refer to Figure 3 1 Site Manager asks Do you REALLY want to delete Telnet Client 2 Click on OK to delete Telnet Client from the router 3 18 Editing TCP Telnet and FTP Parameters Configuring and Customizing the FTP Server Use Site Manager to create the FTP Server edit FTP Server parameters and delete the FTP Server from the router Creating an FTP Server To create an FTP server on the router select Protocols Global Protocols gt FTP Create FTP from the Configuration Manager window refer to Figure 3 1 Editing FTP Global Parameters To edit global parameters for the FTP server follow these steps 1 Select Protocols gt Global Protocols gt FTP
38. port cecccceceeeeeeeeeeeceeeeeeeaeeseeaeeeeeaeeseaeeeseaaeseeeeeeenaaeeneaes xii ul xiii Into RAG E E E EE xiv World Wide Web xiv H w t Get Help nions edi a eee ee ati eee need xiv GC ORVONTIONS EN xiv Ordering Bay Networks Publications c ccccseeceeeeeeeeeeeeeeeeeeeeeaeeeeeeeeseeaeeeeeeeeetaeeeeneeeess XV e Kei xvi Chapter 1 Transmission Control Protocol Overview aeeie E E EE AA EA E E E E E E E TE T 1 1 CONNECTION TW DOS ae ea eevee Piaget eseu ad anian 1 2 Connections and Connection States 0 0 0 ccccccccecesseceeesesneeeeeseeeeeeseseaeeeeesentaeesessenaees 1 3 TGP and IPF Service Users duet ENEE See nie oa tian 1 4 TEIN GE ER 1 5 File Transfer Protocol oiii in ienien aaa aad as aada a iaa aaa ia Ad aaa ee 1 5 For More Information about TOP ceseccceesssceeeesseneeeeeeseneeeeeesesaeeeeeeseseeeesesseeeeeneaea 1 8 Chapter 2 TCP Implementation Notes Memory Considerations cccccccceeeceeeeeeeeeeeaaeeeeeeeeceaaesecaeeeseaaeeeeeeeeseeaeeseeeeeseeeeeeeaaeene 2 1 Chapter 3 Editing TCP Telnet and FTP Parameters Configuring and Customizing TCP ou eeeceeeeeeeeeneeceeeeeeeeeaeeeeeeeeeeeaeeeeeeeeesaeseeeeeeetsaeeeseaeees 3 2 Creating GP EE 3 2 Editing TCP Global Parameters ec eecceseeeeeeeeee eee eeeneteeeeseaeesaesnaeesneeeeeeseeeee 3 3 TCP Global Parameter Descriptions 3 4 Deleting TCP from the Router ceccsecesecseecceeeeeeeeeeeeseeeeaeeneeeeseeseaaeseneeeaaeesneeenneess 3 6 Configur
39. reephone 0800 289378 e In Germany call 0130 37 32 e In Europe except for the United Kingdom and Germany call 44 272 760681 e Outside the U S Canada and Europe call 614 529 1349 and ask for Representative No 591 or consult your listings for an office near you Once you are online you can reach our forum by typing the command GO BAYNETWORKS at any prompt xiii Configuring TCP Services InfoFACTS InfoFACTS is the Bay Networks free 24 hour fax on demand service This automated system contains libraries of technical and product documents designed to help you manage and troubleshoot your Bay Networks products The system can return a fax copy to the caller or to a third party within minutes of being accessed World Wide Web The World Wide Web WWW is a global information system for file distribution and online document viewing via the Internet You need a direct connection to the Internet and a Web Browser such as Mosaic or Netscape Bay Networks maintains a WWW Home Page that you can access at http www baynetworks com One of the menu items on the Home Page is the Customer Support Web Server which offers technical documents software agents and an E mail capability for communicating with our technical support engineers How to Get Help For additional information or advice contact the Bay Networks Technical Response Center in your area United States 1 800 2LAN WAN Valbonne France 33 92 966 96
40. rmination 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 Configuring TCP Services TCP and IP Service Users TCP is the layer or service between IP at the lower layer in the hierarchy of network protocols and programs running at higher layers in the hierarchy Figure 1 1 shows a simple network architecture with four users of TCP IP services the Data Link Switching Service DLSw Telnet FTP and the Border Gateway Protocol BGP Figure 1 1 TCP between IP and Clients 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
41. sfer 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 NLIST Causes the server to send to the client a list of filenames Status STAT _ Causes the server to send to the client the control connection status If the server receives the command during file transfer the server sends the client the status of the transfer Help HELP Provides helpful information No Operation NOOP Specifies no action Causes the server to send an OK reply Change Working CWD Causes the server to change the volume Directory Implementation specific FTP Commands Compact COMP Causes the server to compact the flash card This command should follow a
42. te Port 3 18 Verbose Debug Logging 3 18 Telnet configuration parameters 3 7 to 3 8 Force User Logout 3 8 Manager s Login Script 3 7 User s Login Script 3 8 Telnet server 3 6 to 3 16 creating 3 6 deleting from the router 3 16 editing parameters for 3 8 to 3 9 Telnet server global parameters Command Timeout 3 12 Diagnostic Exercise 3 13 Diagnostic Network Data 3 13 Diagnostic Options 3 14 Diagnostic PTY Data 3 13 Diagnostic Report 3 12 Force User Logout 3 15 Index 2 Login Retries 3 12 Login Timeout 3 11 Manager s Login Script 3 14 Password Timeout 3 11 TI History Depth 3 15 TI Lines per Screen 3 10 TI More 3 10 TI Prompt 3 11 User s Login Script 3 14 Telnet server parameters editing 3 8 to 3 9 Enable Disable 3 10 TI History Depth parameter 3 15 TI Lines per Screen parameter 3 10 TI More parameter 3 10 TI Prompt parameter 3 11 Transmission Control Protocol See TCP Type of Service parameter 3 22 U User s Login Script parameter 3 8 3 14 V Verbose Debug Logging parameter 3 18 W window size for TCP 2 1 3 23 Index 3
43. uter Creating a Telnet Server To create a Telnet Server on the router for inbound Telnet sessions follow these steps 1 Select Protocols gt Global Protocols gt Telnet Server gt Create Telnet Server from the Configuration Manager window refer to Figure 3 1 The Telnet Configuration window appears refer to Figure 3 3 The three parameters displayed locate and define the scripts that run automatically at login 3 6 Editing TCP Telnet and FTP Parameters Manager s Login Script at User s Login Script Butouser bat Force User Logout DISABLE Figure 3 3 Telnet Configuration Window 2 Set these parameters using the guidelines in the next section 3 Click on OK to save your changes and exit the window Telnet Configuration Parameter Descriptions Use the following descriptions as a guide when setting Telnet Configuration parameters Parameter Manager s Login Script Default automgr bat Options The name of the manager s login script file Function At login executes the manager s login script file automatically Instructions If you did not change the name of the manager s login script file accept the default Otherwise enter the new name must be eight characters or less MIB Object ID 1 3 6 1 4 1 18 3 5 3 7 1 21 3 7 Configuring TCP Services Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructio
44. xamine the directory listing of files on the remote router e Delete files on the router The FTP client residing on your 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 1 5 Configuring TCP Services The FTP client on your host initiates an FTP session with an FTP server on the router The session establishes two separate connections between host and router a control connection and a data connection Figure 1 2 Host Router FTP Client LAN WAN Bw Control connection a Data connection Figure 1 2 FTP Client and Server Table 1 2 describes the FTP commands that the FTP server supports on Bay Networks routers 1 6 Table 1 2 Transmission Control Protocol Overview FTP Commands Supported by the FTP Server 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 closes the control connection Transfer Parameter Commands Data Port PORT Specifies the data port to be used in the data connection Representation TYPE Specifies the data transfer type The server supports transfer Type of ASCII and image binary data Transfer Mode MODE Specifies the tran
45. y 1 3 6 1 4 1 18 3 5 3 10 1 7 Control Connection 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 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 3 22 Parameter Default Range Function Instructions MIB Object ID Editing TCP Telnet and FTP Parameters TCP Window Size 60000 bytes 5000 to 64000 bytes Specifies the size of the windows used for TCP connections Determine the window size you require and specify the size in bytes 1 3 6 1 4 1 18 3 5 3 10 1 10 Deleting the FTP Server from the Router To delete the FTP server from the entire router follow these steps 1 Select Protocols gt Global Protocols gt FTP gt Delete FTP in the Configuration Manager window Site Manager asks Do you REALLY want to delete FTP Click on OK to delete the FTP server from the router 3 23 Appendix A Site Manager Default Settings This appendix lists the default settings for Site Manager Use the Configuration Manager to edit any of the Site
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