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Troubleshooting
This chapter describes how to identify and resolve software problems related to the Cisco IOS software
on the Catalyst 2928 switch. Depending on the nature of the problem, you can use the command-line
interface (CLI), the device manager, or Network Assistant to identify and solve problems.
Additional troubleshooting information, such as LED descriptions, is provided in the hardware
installation guide.
For complete syntax and usage information for the commands used in this chapter, see the command
Note
reference for this release and the Cisco IOS Command Summary, Release 12.2.
This chapter consists of these sections:
Recovering from a Software Failure, page 33-2
•
Recovering from a Lost or Forgotten Password, page 33-3
•
Recovering from a Command Switch Failure, page 33-7
•
Recovering from Lost Cluster Member Connectivity, page 33-11
•
Note
Preventing Autonegotiation Mismatches, page 33-11
•
Troubleshooting Power over Ethernet Switch Ports, page 33-11
•
SFP Module Security and Identification, page 33-12
•
Monitoring SFP Module Status, page 33-13
•
•
Using Ping, page 33-13
•
Using Layer 2 Traceroute, page 33-14
•
Using IP Traceroute, page 33-16
Using TDR, page 33-18
•
Using Debug Commands, page 33-18
•
Using the show platform forward Command, page 33-20
•
Using the crashinfo Files, page 33-22
•
Memory Consistency Check Routines, page 33-23
•
Troubleshooting Tables, page 33-24
•
OL-23389-01
Recovery procedures require that you have physical access to the switch.
C H A P T E R
Catalyst 2928 Switch Software Configuration Guide
33
33-1
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Table of Contents
Troubleshooting
