Troubleshooting - Cisco WS-C3750-48PS-S Software Configuration Manual

Troubleshooting

This chapter describes how to identify and resolve software problems related to the Cisco IOS software
on the Catalyst 3750 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.
Unless otherwise noted, the term switch refers to a standalone switch and to a switch stack.
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, refer to the command
Note
reference for this release and the Cisco IOS Command Summary, Release 12.2.
This chapter consists of these sections:
Recovering from Corrupted Software By Using the Xmodem Protocol, page 39-2
•
Recovering from a Lost or Forgotten Password, page 39-4
•
• Preventing Switch Stack Problems, page 39-8
Recovering from a Command Switch Failure, page 39-9
•
• Recovering from Lost Cluster Member Connectivity, page 39-12
Note
Preventing Autonegotiation Mismatches, page 39-13
•
Troubleshooting Power over Ethernet Switch Ports, page 39-13
•
SFP Module Security and Identification, page 39-13
•
Monitoring SFP Module Status, page 39-14
•
Using Ping, page 39-14
•
• Using Layer 2 Traceroute, page 39-16
Using IP Traceroute, page 39-17
•
• Using TDR, page 39-19
Using Debug Commands, page 39-21
•
• Using the show platform forward Command, page 39-23
Using the crashinfo File, page 39-25
•
78-16180-02
Recovery procedures require that you have physical access to the switch.
C H A P T E R
Catalyst 3750 Switch Software Configuration Guide
39
39-1