Avaya Troubleshooting Routers Průvodce řešením problémů

BayRS Version 14.00Part No. 308656-14.00 Rev 00September 19994401 Great America ParkwaySanta Clara, CA 95054Troubleshooting Routers

x308656-14.00 Rev 00Displaying the Current Packet Capture Configuration Settings ... B-30Displaying Event Messages I

Troubleshooting Routers5-22308656-14.00 Rev 00Troubleshooting an FT1 ConnectionThis section assumes that you have isolated a problem to a fractional T

Troubleshooting a Data Link Layer Problem308656-14.00 Rev 005-23 6.Make sure that you set the LBO appropriately. For example, 0.0 dB is short haul (up

Troubleshooting Routers5-24308656-14.00 Rev 00ExampleIf you are filtering events from slots 3 and 4, enter the following command:log -fftwid -eSYNC -s

Troubleshooting a Data Link Layer Problem308656-14.00 Rev 005-25 Check for protocol storms (for example, from IP RIP, IPX RIP, and IPX SAP, and learni

Troubleshooting Routers5-26308656-14.00 Rev 00Troubleshooting a Synchronous to X.21 ConnectionIf you connect a Nortel Networks router running Series 7

Troubleshooting a Data Link Layer Problem308656-14.00 Rev 005-27 If the local loopback test did not cause any error count to be incremented, but the r

Troubleshooting Routers5-28308656-14.00 Rev 00The display shows the settings for all synchronous ports on all slots in the following format:wfSyncEntr

Troubleshooting a Data Link Layer Problem308656-14.00 Rev 005-29 If token ring Debug Event 36 (Connector MAU<SlotConnector> Ring Status Change&l

Troubleshooting Routers5-30308656-14.00 Rev 004.Look at the values of the following attributes:• wfTokenRingMadrSelectThis shows the source of the MAC

Troubleshooting a Data Link Layer Problem308656-14.00 Rev 005-31 3.Check the values of the following statistics twice and compare them to determine wh

308656-14.00 Rev 00xiFiguresFigure 1-1. Filtering Parameters Window ...1-6Figure 3-1.

308656-14.00 Rev 006-1 Chapter 6Troubleshooting a Network Layer ProblemThis chapter describes how to solve network layer problems. It assumes that you

Troubleshooting Routers6-2308656-14.00 Rev 00Troubleshooting AppleTalkThis section assumes that you have isolated a problem to AppleTalk. If not, refe

Troubleshooting a Network Layer Problem308656-14.00 Rev 006-3 5.Verify the configuration parameters.6.Use Packet Capture and a network analyzer to che

Troubleshooting Routers6-4308656-14.00 Rev 00Static Configuration Conflict Event MessageThe node number associated with the interface is already being

Troubleshooting a Network Layer Problem308656-14.00 Rev 006-5 The Technician Interface command is as follows:get wfBrSr.*.04.Use the Technician Interf

Troubleshooting Routers6-6308656-14.00 Rev 00Troubleshooting IPThis section assumes that you have isolated a problem to IP. If not, refer to Chapter 2

Troubleshooting a Network Layer Problem308656-14.00 Rev 006-7 Example$ get wfIpBase.*.0wfIpBase.wfIpBaseCreate.0 = 1wfIpBase.wfIpBaseEnable.0 = 1wfIpB

Troubleshooting Routers6-8308656-14.00 Rev 00•“Ping Does Not Work”•“Troubleshooting RIP”•“Troubleshooting OSPF”Troubleshooting Telnet, FTP, and TFTPTh

Troubleshooting a Network Layer Problem308656-14.00 Rev 006-9 3.Ping your interface address.4.Ping the next-hop address listed in the routing table fo

Troubleshooting Routers6-10308656-14.00 Rev 00•“Endstation Can Ping Local and Remote Interfaces on the Router, but Cannot Ping a Remote Station”Router

Troubleshooting a Network Layer Problem308656-14.00 Rev 006-11 Router Cannot Ping Endstation, but Can Ping Other Endstations on the Same SegmentIf the

Troubleshooting Routers6-12308656-14.00 Rev 00Host Did Not Respond MessageIf the endstation or router displays this message, do the following: 1.Make

Troubleshooting a Network Layer Problem308656-14.00 Rev 006-13 Figure 6-1. Comparing the Endstation and Router Configurations The router uses the subn

Troubleshooting Routers6-14308656-14.00 Rev 00Endstation Can Ping Local and Remote Interfaces on the Router, but Cannot Ping a Remote StationIf the en

Troubleshooting a Network Layer Problem308656-14.00 Rev 006-15 Troubleshooting OSPFTo troubleshoot an OSPF routing problem, do the following:1.Use the

Troubleshooting Routers6-16308656-14.00 Rev 00The Technician Interface displays the table in the following format:wfIpBaseRtEntry.wfIpBaseRouteNextHop

Troubleshooting a Network Layer Problem308656-14.00 Rev 006-17 2.Make sure that the IPX routing software is activated. To do this, use the Statistics

Troubleshooting Routers6-18308656-14.00 Rev 00Example$show ipx circuitIPX Circuit Configuration Information (ALL)-------------------------------------

Troubleshooting a Network Layer Problem308656-14.00 Rev 006-19 Exampleshow ipx ripIPX RIP Interface Record Configuration Information (All)------------

308656-14.00 Rev 00xiiiTablesTable 1-1. Technician Interface Event Message Filters ...1-7Table 1-2. Example

Troubleshooting Routers6-20308656-14.00 Rev 00Example$show ipx route find 0x00000986IPX Routing Table Information-----------------------------Destinat

Troubleshooting a Network Layer Problem308656-14.00 Rev 006-21 Troubleshooting OSIThis section assumes that you have isolated a problem to OSI. If not

Troubleshooting Routers6-22308656-14.00 Rev 00This command allows you to display OSI database information for a particular slot in the router. The dis

Troubleshooting a Network Layer Problem308656-14.00 Rev 006-23 4.To display the dynamic adjacency ID, use the osiadjs alias. The alias definition is a

Troubleshooting Routers6-24308656-14.00 Rev 00c.Determine how PPP is negotiating during the connection.During a successful connection, the control pro

Troubleshooting a Network Layer Problem308656-14.00 Rev 006-25 b.Check the slave site’s routing table for the routes it learned from the master site.

Troubleshooting Routers6-26308656-14.00 Rev 00When the router detects that DSR is in the on state (positive voltage), it brings DTR high regardless of

Troubleshooting a Network Layer Problem308656-14.00 Rev 006-27 2.Disconnect the local and remote CSUs from the DCE, and use a breakout box to verify w

Troubleshooting Routers6-28308656-14.00 Rev 00The Technician Interface command is as follows:log -fftwid -eISDN -eISDN_BRI -eSWSERV -s<slot_no.>

Troubleshooting a Network Layer Problem308656-14.00 Rev 006-29 Example# 11: mm/dd/yy 03:15:49.517 INFO SLOT 1 SWSERV Code: 136ISDN Configured for

Troubleshooting Routers6-30308656-14.00 Rev 00Troubleshooting Other Network Layer ProtocolsThis section assumes that you have isolated a problem to a

Troubleshooting a Network Layer Problem308656-14.00 Rev 006-31 3.Check the values of the following statistics twice and compare them to determine whet

308656-14.00 Rev 007-1 Chapter 7Troubleshooting a Site Manager ProblemThis chapter describes how to solve Site Manager problems. Site Manager Won’t St

Troubleshooting Routers7-2308656-14.00 Rev 00Cannot Find File MessageIf a message like the one in Figure 7-1 states that the application cannot find t

Troubleshooting a Site Manager Problem308656-14.00 Rev 007-3 3.Make sure that the environment variable PATH contains only the path to the protocol sta

Troubleshooting Routers7-4308656-14.00 Rev 003.Enter the wfchkinst command to verify the installation.4.Verify that you updated the /etc/services file

Troubleshooting a Site Manager Problem308656-14.00 Rev 007-5 Cannot Establish a Site Manager Session with the RouterIf you cannot establish a connecti

Troubleshooting Routers7-6308656-14.00 Rev 00Using the Technician Interface to Enable AccessEnable SNMP access as follows:1.Enter the following Techni

Troubleshooting a Site Manager Problem308656-14.00 Rev 007-7 Cannot Connect Site Manager Running on a PCTroubleshoot Site Manager connectivity problem

308656-14.00 Rev 00xv PrefaceThis guide describes how to isolate and solve problems associated with Nortel Networks™ routers.Before You BeginThis guid

Troubleshooting Routers7-8308656-14.00 Rev 00Cannot Connect Site Manager Running on a UNIX WorkstationTroubleshoot Site Manager connectivity problems

Troubleshooting a Site Manager Problem308656-14.00 Rev 007-9 Target Does Not Respond (or Similar Message)When the destination of the ping request fail

308656-14.00 Rev 008-1 Chapter 8Getting HelpThis chapter explains how to get help from Nortel Networks when you are unable to resolve a problem using

Troubleshooting Routers8-2308656-14.00 Rev 003.What is the router’s serial number?Enter the Technician Interface command get wfHwBase.3.0 to display t

Getting Help308656-14.00 Rev 008-3 Sending and Retrieving FilesSending your configuration files, traces, and router event logs can help Nortel Network

Troubleshooting Routers8-4308656-14.00 Rev 008.Enter put <filename> if you are sending a file; enter get <filename> if you are retrieving

308656-14.00 Rev 00A-1 Appendix AReading the Event LogThis appendix provides examples and explanations of the descriptive text in event messages and d

Troubleshooting RoutersA-2308656-14.00 Rev 00System StartupThe following sample message is from a log of a Series 7 router after it was restarted with

Reading the Event Log308656-14.00 Rev 00A-3 Each slot transmits BofL requests via the backplane to the other slots in the router in order to determine

Troubleshooting Routersxvi308656-14.00 Rev 00Text ConventionsThis guide uses the following text conventions:angle brackets (< >) Indicate that y

Troubleshooting RoutersA-4308656-14.00 Rev 00The software running in slot 2 synchronized the system clock (WCLCK) with the other slots in the router.@

Reading the Event Log308656-14.00 Rev 00A-5 The software interface to the kernel provides for the transmission of both unreliable and reliable message

Troubleshooting RoutersA-6308656-14.00 Rev 00@ 81: mm/dd/yy 11:48:35.533 DEBUG # 2 LOADER ( 2) Loader starting service gate 0x0001e @ 0x300a

Reading the Event Log308656-14.00 Rev 00A-7 @ 108: mm/dd/yy 11:48:36.361 DEBUG # 2 GAME ( 97) SOLO (0x00095): election WON 0x20000000 (repl=

Troubleshooting RoutersA-8308656-14.00 Rev 00IP loaded successfully and is initializing. IP indicates that it is in “router” mode, rather than “host o

Reading the Event Log308656-14.00 Rev 00A-9 IPX initialized and the IPX RTM and IPX STM (server table manager) are starting up and setting the maps to

Troubleshooting RoutersA-10308656-14.00 Rev 00@ 162: mm/dd/yy 11:48:39.869 DEBUG # 2 GAME ( 23) SOLO (0x0001b): election opening 30000000/30

Reading the Event Log308656-14.00 Rev 00A-11 @ 197: mm/dd/yy 11:48:45.049 DEBUG # 2 GAME ( 97) SOLO (0x00401): election WON 0x20000000 (repl

Troubleshooting RoutersA-12308656-14.00 Rev 00Slot 3 boots successfully and is attempting to load the configuration file from slot 2.@ 227: mm/dd/yy

Reading the Event Log308656-14.00 Rev 00A-13 @ 247: mm/dd/yy 11:48:50.115 DEBUG # 3 LOADER ( 2) Loader starting service gate 0x0001e @ 0x300a

Preface308656-14.00 Rev 00xvii AcronymsThis guide uses the following acronyms:italic text Indicates file and directory names, new terms, book titles,

Troubleshooting RoutersA-14308656-14.00 Rev 00@ 283: mm/dd/yy 11:48:51.326 DEBUG # 2 LOADER ( 33) Loader service completed for snmp.exe, 0x100

Reading the Event Log308656-14.00 Rev 00A-15 AppleTalk (entity AT) loads successfully and initializes on slot 3. The operating system elects to run th

Troubleshooting RoutersA-16308656-14.00 Rev 00The object wfProtocols is the protocol bit-map object. Each attribute is a different protocol. Every tim

Reading the Event Log308656-14.00 Rev 00A-17 @ 366: mm/dd/yy 11:50:47.639 DEBUG # 3 LOADER ( 33) Loader service completed for tn.exe, 0x200040

Troubleshooting RoutersA-18308656-14.00 Rev 00Dial-on-Demand Raise DTR LogThe following log shows a successful dial-on-demand connection between the C

Reading the Event Log308656-14.00 Rev 00A-19 The following messages indicate that you configured the port for Raise DTR, rather than V.25bis, and remi

Troubleshooting RoutersA-20308656-14.00 Rev 00The router waits for DSR to come up to indicate that the modem established a connection to the remote no

Reading the Event Log308656-14.00 Rev 00A-21 # 68: mm/dd/yy 14:15:35.132 TRACE SLOT 2 PPP Code: 44Sending IPCP Configure-Ack on circuit 3

Troubleshooting RoutersA-22308656-14.00 Rev 00The router completes the orderly termination of the dial-on-demand link by re-initializing the port. #

Reading the Event Log308656-14.00 Rev 00A-23 Dial-on-Demand V.25bisThe following log shows a successful dial-on-demand connection between the COM1 por

Troubleshooting Routersxviii308656-14.00 Rev 00AUI Attachment Unit InterfaceB8ZS binary 8 zero substitutionBDR backup designated routerBECN backward e

Troubleshooting RoutersA-24308656-14.00 Rev 00The port uses the CTS (clear to send) pin signal to determine whether a modem is present.# 14: mm/dd/

Reading the Event Log308656-14.00 Rev 00A-25 # 24: mm/dd/yy 13:09:16.178 DEBUG SLOT 2 SWSERV Code: 44SW Sent you are cc 2 message to line

Troubleshooting RoutersA-26308656-14.00 Rev 00The router receives a response from the modem.# 67: mm/dd/yy 13:12:59.032 TRACE SLOT 2 MODEMIF

Reading the Event Log308656-14.00 Rev 00A-27 # 78: mm/dd/yy 13:13:25.930 INFO SLOT 2 PPP Code: 38Link Establishment Phase complete on ci

Troubleshooting RoutersA-28308656-14.00 Rev 00# 94: mm/dd/yy 13:13:51.552 INFO SLOT 2 SYNC Code: 13Connector COM1 LLC1 service withdrawn.

Reading the Event Log308656-14.00 Rev 00A-29 MCT1 Log Information in a Lab EnvironmentThe log messages in this section show what happens when you acce

Troubleshooting RoutersA-30308656-14.00 Rev 00Last line 0x400b4e3 in cct 3 died, killing circuit gateDP killing CC gate for cct 3.# 10: mm/dd/yy 10:

Reading the Event Log308656-14.00 Rev 00A-31 To disable payload loopback, click on FDL Disable Payload in the Line Tests window. (FDL stands for facil

Troubleshooting RoutersA-32308656-14.00 Rev 00# 8: mm/dd/yy 10:38:39.367 DEBUG SLOT 4 PCAP Code: 67interface became local - line 109041

Reading the Event Log308656-14.00 Rev 00A-33 If you click on the FDL Disable Line Loop option, the LED turns off and the following log messages appear

Preface308656-14.00 Rev 00xix DSAP destination service access pointDSL digital subscriber loopDSR data set readyDSU digital service unitDTE data termi

Troubleshooting RoutersA-34308656-14.00 Rev 00If you click on FDL Disable ALL, the MIB entity disables all FDL line loops. It sends a Universal Loopba

Reading the Event Log308656-14.00 Rev 00A-35 Connector COM1, Logical Line 1 time_slot = 7.Connector COM1, Logical Line 1 time_slot = 8.Connector COM1,

Troubleshooting RoutersA-36308656-14.00 Rev 00The following command displays the new port status:[3:1]$ show ds1e1 portDS1E1 Port Status:-------------

Reading the Event Log308656-14.00 Rev 00A-37 The following command displays the new port status:[3:1]$ show ds1e1 portDS1E1 Port Status:--------------

308656-14.00 Rev 00B-1 Appendix BUsing the Technician Interface toConfigure and Run Packet CaptureThis appendix describes how to use the Technician In

Troubleshooting RoutersB-2308656-14.00 Rev 00OverviewPacket Capture allows you to examine packets passing through selected circuits on a Nortel Networ

Using the Technician Interface to Configure and Run Packet Capture308656-14.00 Rev 00B-3 2.Establish a remote connection to the router using FTP, TFTP

Troubleshooting RoutersB-4308656-14.00 Rev 004.Establish an FTP, TFTP, or XMODEM connection to the router from an MS-DOS PC or Sun workstation to tran

Using the Technician Interface to Configure and Run Packet Capture308656-14.00 Rev 00B-5 Getting StartedThis section describes how to start and stop P

ii308656-14.00 Rev 00 Copyright © 1999 Nortel NetworksAll rights reserved. Printed in the USA. September 1999.The information in this document is subj

Troubleshooting Routersxx308656-14.00 Rev 00ISAP internal services access pointISDN Integrated Services Digital NetworkISO International Organization

Troubleshooting RoutersB-6308656-14.00 Rev 00If you want Packet Capture to copy packets from circuits in a single I/O module, use the associated slot

Using the Technician Interface to Configure and Run Packet Capture308656-14.00 Rev 00B-7 ExampleCapture packets from the I/O modules in slots 3, 4, 8,

Troubleshooting RoutersB-8308656-14.00 Rev 00Get the number of the logical line from which you want to copy packets as follows:1.Enter the following T

Using the Technician Interface to Configure and Run Packet Capture308656-14.00 Rev 00B-9 ExampleEnter the following command to create an instance for

Troubleshooting RoutersB-10308656-14.00 Rev 00• HSSIget wfHssiEntry.60.<slot>.<connector>60 represents the wfHssiLineNumber attribute.• IS

Using the Technician Interface to Configure and Run Packet Capture308656-14.00 Rev 00B-11 Allocating Memory for the Packet Capture FileYou must alloca

Troubleshooting RoutersB-12308656-14.00 Rev 00If less than 200 KB of free memory remains after Packet Capture starts, it sends a warning message to th

Using the Technician Interface to Configure and Run Packet Capture308656-14.00 Rev 00B-13 ExampleEnter the following command to enable Packet Capture

Troubleshooting RoutersB-14308656-14.00 Rev 00ExampleEnter the following command to enable Packet Capture for line number 202101:set wfPktCaptureEntry

Using the Technician Interface to Configure and Run Packet Capture308656-14.00 Rev 00B-15 -- The number of bytes in the packet-- The direction of the

Preface308656-14.00 Rev 00xxi PCAP Packet Capture utilityPCR peak cell ratePDU protocol data unitPPP Point-to-Point Protocol PROM programmable read-on

Troubleshooting RoutersB-16308656-14.00 Rev 00Example 2Enter the following command to display all packets starting with the second packet in the Packe

Using the Technician Interface to Configure and Run Packet Capture308656-14.00 Rev 00B-17 Example 4Enter the following command to display only the sec

Troubleshooting RoutersB-18308656-14.00 Rev 00Using Optional FeaturesThe following sections describe how to use optional Packet Capture features:•“Con

Using the Technician Interface to Configure and Run Packet Capture308656-14.00 Rev 00B-19 Configuring a Termination TriggerBy default, Packet Capture

Troubleshooting RoutersB-20308656-14.00 Rev 00<value> is one of the following:• 1 -- Packet Capture terminates when the Packet Capture file is f

Using the Technician Interface to Configure and Run Packet Capture308656-14.00 Rev 00B-21 Assigning FiltersRead this section if you want to specify a

Troubleshooting RoutersB-22308656-14.00 Rev 00Setting the Filter Response to a MatchEnter the following Technician Interface command to set the respon

Using the Technician Interface to Configure and Run Packet Capture308656-14.00 Rev 00B-23 Specifying the String to Compare with the Packet DataEnter t

Troubleshooting RoutersB-24308656-14.00 Rev 00Specifying the ReferenceEnter the following Technician Interface command to specify the Reference, which

Using the Technician Interface to Configure and Run Packet Capture308656-14.00 Rev 00B-25 Specifying the OffsetEnter the following Technician Interfac

Troubleshooting Routersxxii308656-14.00 Rev 00STM server table managerSTP shielded twisted pairSWSERV switched access serviceTCP/IP Transmission Contr

Troubleshooting RoutersB-26308656-14.00 Rev 00• 22 for Transmit Filter 1Represents the wfPktCaptureTxFltr1Size attribute•33 for Transmit Filter 2Repre

Using the Technician Interface to Configure and Run Packet Capture308656-14.00 Rev 00B-27 <value> is one of the following:• 1 -- Packet Capture

Troubleshooting RoutersB-28308656-14.00 Rev 00Example 2This example starts and stops Packet Capture. The instructions are as follows:1.Start Packet Ca

Using the Technician Interface to Configure and Run Packet Capture308656-14.00 Rev 00B-29 3.Specify the number of bytes after the Reference with which

Troubleshooting RoutersB-30308656-14.00 Rev 005.Specify the string as the hexadecimal number ffffffffffff:set wfPktCaptureEntry.28.102101 0xffffffffff

Using the Technician Interface to Configure and Run Packet Capture308656-14.00 Rev 00B-31 wfPktCaptureEntry.wfPktCaptureRxFltr1Match.102101 = (nil)wfP

Troubleshooting RoutersB-32308656-14.00 Rev 00Getting the Name of the Packet Capture FileTo get a Packet Capture file stored in the router’s memory, y

Using the Technician Interface to Configure and Run Packet Capture308656-14.00 Rev 00B-33 Enter the following commands at the command-line interface o

Troubleshooting RoutersB-34308656-14.00 Rev 00Enter the following commands at the command-line interface of the Sun workstation:1.Issue the following

Using the Technician Interface to Configure and Run Packet Capture308656-14.00 Rev 00B-35 Using XMODEM to Transfer the FileEnter the following Technic

Preface308656-14.00 Rev 00xxiii Hard-Copy Technical ManualsYou can print selected technical manuals and release notes free, directly from the Internet

Troubleshooting RoutersB-36308656-14.00 Rev 00Converting a Packet Capture File to Network General Sniffer FormatYou can use the Packet Convert utility

Using the Technician Interface to Configure and Run Packet Capture308656-14.00 Rev 00B-37 3.Access the directory containing the Packet Convert utility

Troubleshooting RoutersB-38308656-14.00 Rev 00•“Packet Capture Parameter Descriptions”•“Media-Specific Instructions and Examples”•“Interpreting a Pack

Using the Technician Interface to Configure and Run Packet Capture308656-14.00 Rev 00B-39 wfPktCaptureRxFltr2Offset = 25wfPktCaptureRxFltr2Ref = 26wfP

Troubleshooting RoutersB-40308656-14.00 Rev 00Basic ParametersThe basic parameters are common to all Packet Capture configurations. The basic paramete

Using the Technician Interface to Configure and Run Packet Capture308656-14.00 Rev 00B-41 Parameter: Disable Attribute Name: wfPktCaptureDisable Attr

Troubleshooting RoutersB-42308656-14.00 Rev 00 Parameter: Filename Attribute Name: wfPktCaptureFname Attribute Number: 4 Default: Set by Packet Captur

Using the Technician Interface to Configure and Run Packet Capture308656-14.00 Rev 00B-43 Parameter: Line Number Attribute Name: wfPktCaptureLineNumb

Troubleshooting RoutersB-44308656-14.00 Rev 00 Parameter: Packet Size Attribute Name: wfPktCapturePktSize Attribute Number: 9 Default: None Range: 1 (

Using the Technician Interface to Configure and Run Packet Capture308656-14.00 Rev 00B-45 Trigger ParametersYou use triggers to stop copying packets w

Troubleshooting RoutersB-46308656-14.00 Rev 00If you want Packet Capture to terminate when it matches data to a string you specify, use one of the fol

Using the Technician Interface to Configure and Run Packet Capture308656-14.00 Rev 00B-47 Parameter: TypePacket Capture supports four Type parameters

Troubleshooting RoutersB-48308656-14.00 Rev 00 Parameter: OffsetPacket Capture supports four Offset parameters. Default: None Options: Limited to size

Using the Technician Interface to Configure and Run Packet Capture308656-14.00 Rev 00B-49 Parameter: ReferencePacket Capture supports four Reference

Troubleshooting RoutersB-50308656-14.00 Rev 00 Parameter: SizePacket Capture supports four Size parameters. Default: None Options: Maximum of 16 bytes

Using the Technician Interface to Configure and Run Packet Capture308656-14.00 Rev 00B-51 Parameter: GroupPacket Capture supports two Group parameter

Troubleshooting RoutersB-52308656-14.00 Rev 00An example of a hexadecimal display of a CSMA/CD frame follows.Pkt# 10 mm/dd/yy 10:20:32.670 CSMACD 60 R

Using the Technician Interface to Configure and Run Packet Capture308656-14.00 Rev 00B-53 BisynchronousThe bisynchronous (BISYNC) protocol does not ha

Troubleshooting RoutersB-54308656-14.00 Rev 00PassthruThe Passthru (PASS) protocol does not have a special data link filter offset. If you configure a

Using the Technician Interface to Configure and Run Packet Capture308656-14.00 Rev 00B-55 SDLCThe Synchronous Data Link Control (SDLC) protocol does n

308656-14.00 Rev 001-1 Chapter 1IntroductionThis chapter describes how to prevent router problems and prepare to troubleshoot.Preventing ProblemsThe f

Troubleshooting RoutersB-56308656-14.00 Rev 00Token RingThe token ring physical medium has a data link filter offset of 14 bytes plus the routing info

Using the Technician Interface to Configure and Run Packet Capture308656-14.00 Rev 00B-57 An example of a hexadecimal display of a HSSI frame follows:

Troubleshooting RoutersB-58308656-14.00 Rev 00ExampleThe code for a single CSMA/CD interface on slot 2 using XCVR1 is 0000102101. Site Manager removes

308656-14.00 Rev 00C-1 Appendix CPacket ConfigurationThe config packet command enables you to configure the Packet Capture utility using the Technicia

Troubleshooting RoutersC-2308656-14.00 Rev 00Using the Line Subcommandconfig packet line [<line_number>] configures packet capturing on the spec

Packet Configuration308656-14.00 Rev 00C-3 6: FDDI7: HSSI9: MCT113: ISDN D ChannelEnter media type by number: 1Enter slot number: 5Enter connector num

Troubleshooting RoutersC-4308656-14.00 Rev 003: Stop Capture when Transmit Filter Two is Matched4: No Transmit TriggerCurrent value for Transmit Trigg

Packet Configuration308656-14.00 Rev 00C-5 Current value for Transmit Filter One Type is 3Press return for current value or enter new value: Using the

308656-14.00 Rev 00Index-1Symbols*, in get command, 1-17AACE32 memory limitations, 3-13acronyms, xixadding VC gate w/GH event message, 5-6address form

Troubleshooting Routers1-2308656-14.00 Rev 00Reading the Release Notes and Relevant DocumentationThe release notes and the manuals that describe how t

Index-2308656-14.00 Rev 00buffersallocating for Packet Capture, B-11memory allocation error, 3-12Ccables, 4-3call request number (CRN), 6-23cannot fin

308656-14.00 Rev 00Index-3DLSw (data link switching), 6-4 to 6-5downstream neighbor, 5-16dropped (clipped) frames, 5-13DS0 channels. See digital signa

Index-4308656-14.00 Rev 00Hheartbeat test, Ethernet, 5-13help from the Nortel Networks Technical Solutions Center, 8-1host did not respond message, 6-

308656-14.00 Rev 00Index-5DLSw filter, 6-4FDDI filter, 5-14filtering, 1-6 to 1-8Frame Relay filter, 5-17FTP filter, 6-8IP filter, 6-6IPX filter, 6-16M

Index-6308656-14.00 Rev 00ATM, B-52bisynchronous, B-53configuring, C-1converting files, B-36CSMA/CD, B-51deleting an instance, B-17direction, B-18disp

308656-14.00 Rev 00Index-7QQuad Ethernet (QENET), 5-13Quick Get tool, 1-19RRaise DTR dial servicesRS-232, 6-25V.35, 6-26receiver lack-of-resource erro

Index-8308656-14.00 Rev 00switched services, 6-23 to 6-29synchronous connections, 5-23 to 5-28Packet Capture, B-9system startup event messages, A-2 to

308656-14.00 Rev 00Index-9wfCSMACDEntry, 5-9wfCSMACDLineNumber, B-9wfDlsInterfaceEntry, 6-5wfDs1E1PortMapLineNumber, B-8wfFddiEntry, 5-14wffddiLineNum

Introduction308656-14.00 Rev 001-3 Saving Your Configuration ChangesThe router overwrites the configuration changes in memory when it reboots. If you

Troubleshooting Routers1-4308656-14.00 Rev 00Handling Flash Memory Cards to Prevent Static DamageAlways use an antistatic wrist strap when handling fl

Introduction308656-14.00 Rev 001-5 Using the System Log to Display Event MessagesThe processor that is running software in each slot maintains its own

308656-14.00 Rev 00iiiNortel Networks NA Inc. Software License AgreementNOTICE: Please carefully read this license agreement before copying or using t

Troubleshooting Routers1-6308656-14.00 Rev 00If you want to save a log in ASCII format, choose File > Save Output to Disk from the Events Manager w

Introduction308656-14.00 Rev 001-7 The Filtering Parameters window allows you to filter based on the severity of the event messages, the software enti

Troubleshooting Routers1-8308656-14.00 Rev 00You can specify filters for more than one severity type. The Events Manager’s Filter window allows you to

Introduction308656-14.00 Rev 001-9 However, displaying the debug messages can help you to understand the systematic process the software uses to load

Troubleshooting Routers1-10308656-14.00 Rev 00Displaying and Changing Configuration Settings and StatisticsThe router’s management information base (M

Introduction308656-14.00 Rev 001-11 You assign each attribute a unique number called an attribute identifier. For example, you use 1 for list price, 2

Troubleshooting Routers1-12308656-14.00 Rev 00Table 1-2 presents the attributes and instances for the example object House. The attributes and instanc

Introduction308656-14.00 Rev 001-13 Suppose you create several diverse objects and you want to organize them. You can create an object to organize and

Troubleshooting Routers1-14308656-14.00 Rev 00For example, the object identifier of wfCSMACDMadr (the media access control address) is 10. When enteri

Introduction308656-14.00 Rev 001-15 To determine the format of an instance, search for the name of the object in the associated MIB file (<object&g

iv308656-14.00 Rev 00for the security of its own data and information and for maintaining adequate procedures apart from the Software to reconstruct

Troubleshooting Routers1-16308656-14.00 Rev 00You can use the following Technician Interface commands to access the MIB:•list displays the object name

Introduction308656-14.00 Rev 001-17 When entering a get command, you can use an asterisk (*) in place of an attribute to display all of the attribute

Troubleshooting Routers1-18308656-14.00 Rev 00The advantage of using the Technician Interface scripts, the Statistics Manager, or the Configuration Ma

Introduction308656-14.00 Rev 001-19 Using the Statistics Manager to Access the MIBThe Statistics Manager tools allow you to monitor a router’s status

Troubleshooting Routers1-20308656-14.00 Rev 00Using the ping CommandThe ping command is available both from the Site Manager Administration menu and t

Introduction308656-14.00 Rev 001-21 Using Inbound Telnet to Access the Technician InterfaceVersions 7.60 and later allow you to use Telnet to establis

Troubleshooting Routers1-22308656-14.00 Rev 00Taking a Snapshot of Your NetworkNortel Networks recommends that you periodically gather and save the fo

Introduction308656-14.00 Rev 001-23 You can use any text editor to read the ASCII files, or print and organize them for later reference.A map of your

Troubleshooting Routers1-24308656-14.00 Rev 00Performing One Corrective Task at a TimeAlways perform one corrective task at a time. Then, repeat the t

308656-14.00 Rev 002-1 Chapter 2Determining the Scope of a ProblemThis chapter poses the initial questions you should answer to narrow the cause of a

308656-14.00 Rev 00vContents PrefaceBefore You Begin ...

Troubleshooting Routers2-2308656-14.00 Rev 004.Are you using a workaround to prevent the symptoms from occurring? If so, what?Consideration of the wor

Determining the Scope of a Problem308656-14.00 Rev 002-3 • A single protocol on multiple ports in all slots running that protocol?If so, the problem i

308656-14.00 Rev 003-1 Chapter 3Troubleshooting an Operational ProblemThis chapter describes how to solve problems with the basic operation of the har

Troubleshooting Routers3-2308656-14.00 Rev 00Damaged RouterIf you detect physical damage to the router, report the problem to the Nortel Networks Tech

Troubleshooting an Operational Problem308656-14.00 Rev 003-3 To determine whether a fuse has blown in a BLN or BCN, and to isolate and replace a blown

Troubleshooting Routers3-4308656-14.00 Rev 003.If you recently installed the router software image, make sure it is correct for the router type. For d

Troubleshooting an Operational Problem308656-14.00 Rev 003-5 Troubleshoot an ASN as follows:a.If the ASN is in a stack, make sure that the SPEX slot d

Troubleshooting Routers3-6308656-14.00 Rev 00Checking the Boot PROMsMake sure that the boot PROM images are compatible with the router software image

Troubleshooting an Operational Problem308656-14.00 Rev 003-7 If the router has more than one flash memory card, see the following sections to make sur

vi308656-14.00 Rev 00Chapter 2 Determining the Scope of a ProblemChapter 3 Troubleshooting an Operational ProblemDamaged Router ...

Troubleshooting Routers3-8308656-14.00 Rev 00If the slots are operating with router software images from different volumes, do the following:1.Display

Troubleshooting an Operational Problem308656-14.00 Rev 003-9 Verifying That the Configuration Files in Each Processor MatchTo display the source of th

Troubleshooting Routers3-10308656-14.00 Rev 003.Determine which configuration file you want to use. 4.Back up the unwanted configuration file.5.Remove

Troubleshooting an Operational Problem308656-14.00 Rev 003-11 4.Insert the flash memory card containing the router software image and configuration fi

Troubleshooting Routers3-12308656-14.00 Rev 00To view the status of a flash memory card, display its directory. The directory display shows the amount

Troubleshooting an Operational Problem308656-14.00 Rev 003-13 Thus, the amount of local memory available determines the maximum number of entries in a

Troubleshooting Routers3-14308656-14.00 Rev 00The Technician Interface displays the following:-- How much memory is available-- The starting program c

Troubleshooting an Operational Problem308656-14.00 Rev 003-15 ----------------------Loadmap from SLOT 2:------------------------> arp.exe

Troubleshooting Routers3-16308656-14.00 Rev 00--> ftp.exe 0x3164d6e0 0042868--> tcp.exe 0x31657e70 0057776--> tftp.exe

Troubleshooting an Operational Problem308656-14.00 Rev 003-17 Bad Forward Receive Buffer Checksum ErrorsAn event message beginning with buf= follows t

308656-14.00 Rev 00viiTroubleshooting ATM LANE ...5-7Troubleshootin

Troubleshooting Routers3-18308656-14.00 Rev 00Go to the appropriate section to determine which slot sent the backplane BofL packet:• If the number 0x0

Troubleshooting an Operational Problem308656-14.00 Rev 003-19 Finding the Slot That Sent a Bad Packet That Was Not a BofL PacketFind the number of the

Troubleshooting Routers3-20308656-14.00 Rev 00Fault MessageIf a software entity experiences a fault and fails to recover, do the following:1.Disable a

308656-14.00 Rev 004-1 Chapter 4Troubleshooting a Physical Media ProblemThis chapter describes how to solve physical media problems. It assumes that y

Troubleshooting Routers4-2308656-14.00 Rev 00For example, enter get wfCSMACDEntry.3.1.4 to display the state of Ethernet in slot 1, connector 4.You ca

Troubleshooting a Physical Media Problem308656-14.00 Rev 004-3 Respond to the State attribute values as follows:1.If the state of the interface in que

Troubleshooting Routers4-4308656-14.00 Rev 002.Make sure that both ends of the cable are firmly connected to the proper interfaces. 3.Check the LEDs o

Troubleshooting a Physical Media Problem308656-14.00 Rev 004-5 If the connection is FDDI or ATM Rx and Tx:a.Make sure you have cabled ports A and B co

308656-14.00 Rev 005-1 Chapter 5Troubleshooting a Data Link Layer ProblemThis chapter describes how to solve data link layer problems. It assumes that

viii308656-14.00 Rev 00Endstation Can Ping Devices on the Same Segment, but Cannot Ping the Router ...

Troubleshooting Routers5-2308656-14.00 Rev 00Troubleshooting an ATM ConnectionThis section assumes that you have isolated a problem to an ATM interfac

Troubleshooting a Data Link Layer Problem308656-14.00 Rev 005-3 4.Redisplay the MIB objects in Tab l e 5 - 1 after 1 minute; then, compare the values

Troubleshooting Routers5-4308656-14.00 Rev 005.Use the Events Manager or the Technician Interface to display the attributes associated with the MIB ob

Troubleshooting a Data Link Layer Problem308656-14.00 Rev 005-5 Dropped FramesTroubleshoot dropped frames as follows:1.Use the Events Manager or the T

Troubleshooting Routers5-6308656-14.00 Rev 004.Match the error code in the message to the Error Code column in Tabl e 5-5, and follow the associated i

Troubleshooting a Data Link Layer Problem308656-14.00 Rev 005-7 PVC ProblemsFor PVC problems, do the following:1.If the connecting switch does not sup

Troubleshooting Routers5-8308656-14.00 Rev 003.Use the Events Manager or the Technician Interface to display the attributes associated with the MIB ob

Troubleshooting a Data Link Layer Problem308656-14.00 Rev 005-9 Troubleshooting an Ethernet ConnectionThis section assumes that you have isolated a pr

Troubleshooting Routers5-10308656-14.00 Rev 00• wfCSMACDOctetsRxOkThis shows the number of bytes received without error.• wfCSMACDFramesRxOkThis shows

Troubleshooting a Data Link Layer Problem308656-14.00 Rev 005-11 • wfCSMACDBablErrorTxThis shows the number of frames transmitted that were larger tha

308656-14.00 Rev 00ixChapter 8 Getting HelpReporting a Problem to the Nortel Networks Technical Solutions Center ...8-1Sending and

Troubleshooting Routers5-12308656-14.00 Rev 00Check the wfKernelEntry for the slot where the problem is occurring to determine whether buffers are ava

Troubleshooting a Data Link Layer Problem308656-14.00 Rev 005-13 • wfCSMACDCerrThis shows the number of Ethernet controller chip collision detections.

Troubleshooting Routers5-14308656-14.00 Rev 00If underflow errors or corrupted frames occur, enable the attribute wfCSMACDAlignmentMode, which determi

Troubleshooting a Data Link Layer Problem308656-14.00 Rev 005-15 • wfFDDIRingOverrunRx (get wfFddiEntry.21.*)This shows the number of logical link con

Troubleshooting Routers5-16308656-14.00 Rev 00This state indicates that ports A and B connect to two different concentrators that connect to the same

Troubleshooting a Data Link Layer Problem308656-14.00 Rev 005-17 Troubleshooting a Frame Relay ConnectionThis section assumes that you have isolated a

Troubleshooting Routers5-18308656-14.00 Rev 00Frame Relay Switch Keeps Marking the Circuit as DownTroubleshoot as follows:1.Check the polling interval

Troubleshooting a Data Link Layer Problem308656-14.00 Rev 005-19 Frame Relay Configured with LMI Invokes an Xoff StateIf a Frame Relay switch exceeds

Troubleshooting Routers5-20308656-14.00 Rev 00Troubleshooting an MCT1 ConnectionThis section assumes that you have isolated a problem to a multichanne

Troubleshooting a Data Link Layer Problem308656-14.00 Rev 005-21 5.Watch the LEDs on the back of the MCT1 module. If the Sync LED keeps flashing, the