Avaya Troubleshooting Routers Průvodce řešením problémů stáhnout pdf (Strana 196)

Troubleshooting Routers

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308656-14.00 Rev 00

Overview

Packet Capture allows you to examine packets passing through selected circuits

on a Nortel Networks router. It copies the packets from the circuits to a file in the

router’s memory. You can then open the file and view the packets to troubleshoot a

problem.

The following routers and physical media services support Packet Capture:

• Routers: AN, ANH, AFN, ARN, ASN, ALN, FN, LN, CN, BLN, BLN-2,

BCN

• Physical media services: CSMA/CD (Ethernet), synchronous, T1, E1, MCT1,

token ring, FDDI, HSSI, ISDN

You can use Packet Capture to do the following:

• Copy all incoming packets, outgoing packets, or both.

• Filter and copy incoming packets, outgoing packets, or both.

• Filter incoming packets, outgoing packets, or both, and copy only selected

contents of those packets.

You can terminate Packet Capture as follows:

• Enter a command to terminate it immediately.

• Configure it to terminate itself when the Packet Capture file is full.

• Configure it to terminate itself when it matches a portion of an incoming or

outgoing packet to a hexadecimal number or character string that you specify.

After Packet Capture terminates, you must choose a method to examine the file.

Select the option in the following list that identifies the tools that you have

available:

Establish a remote connection to the router using Optivity Internetwork 6.1 or

later; then, use Network Tap to transfer a copy of the Packet Capture file and

display the packets in hexadecimal, summary, or decoded format.

The decoded format identifies each field in the packet and, where appropriate,

displays its contents in English. It also allows you to search packets for

character strings.

See Using Optivity Network Management System 8.0 Internetwork

Applications for Network Tap instructions.

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