Specifications

CHAPTER

29-1

Catalyst 2970 Switch Software Configuration Guide

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Troubleshooting

This chapter describes how to identify and resolve software problems related to the Cisco IOS software

on the Catalyst 2970 switch. Depending on the nature of the problem, you can use the command-line

interface (CLI) or the Cluster Management Suite (CMS) to identify and solve problems.

Additional troubleshooting information, such as LED descriptions, is provided in the hardware

installation guide.

Note For complete syntax and usage information for the commands used in this chapter, refer to the command

reference for this release and the Cisco IOS Command Summary for Release 12.1.

This chapter consists of these sections:

• Recovering from Corrupted Software By Using the XMODEM Protocol, page 29-2

• Recovering from a Lost or Forgotten Password, page 29-4

• Recovering from a Command Switch Failure, page 29-8

• Recovering from Lost Cluster Member Connectivity, page 29-11

Note Recovery procedures require that you have physical access to the switch.

• Preventing Autonegotiation Mismatches, page 29-12

• SFP Module Security and Identification, page 29-12

• Using Ping, page 29-13

• Using Layer 2 Traceroute, page 29-14

• Using IP Traceroute, page 29-16

• Using Debug Commands, page 29-17

• Using the show platform forward Command, page 29-19

• Using the crashinfo File, page 29-21