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Catalyst 3560 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 3560 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.
Note For complete syntax and usage information for the commands used in this chapter, see the command
reference for this release and the Cisco IOS Commands Master List, Release 12.2 from the Cisco.com
page under Documentation > Cisco IOS Software > 12.2 Mainline > Command References.
This chapter consists of these sections:
Recovering from a Software Failure, page 47-2
Recovering from a Lost or Forgotten Password, page 47-3
Recovering from a Command Switch Failure, page 47-7
Recovering from Lost Cluster Member Connectivity, page 47-11
Note Recovery procedures require that you have physical access to the switch.
Preventing Autonegotiation Mismatches, page 47-11
Troubleshooting Power over Ethernet Switch Ports, page 47-12
SFP Module Security and Identification, page 47-12
Monitoring SFP Module Status, page 47-13
Monitoring Temperature, page 47-13
Using Ping, page 47-13
Using Layer 2 Traceroute, page 47-15
Using IP Traceroute, page 47-16
Using TDR, page 47-18
Using Debug Commands, page 47-19
Using the show platform forward Command, page 47-20
Using the crashinfo Files, page 47-23