Troubleshooting - Cisco 3750G - Catalyst Integrated Wireless LAN Controller 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), the device manager, or Network Assistant 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, 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 43-2
•
• Recovering from a Lost or Forgotten Password, page 43-3
Preventing Switch Stack Problems, page 43-7
•
• Recovering from a Command Switch Failure, page 43-8
Recovering from Lost Cluster Member Connectivity, page 43-12
•
Note
Preventing Autonegotiation Mismatches, page 43-12
•
Troubleshooting Power over Ethernet Switch Ports, page 43-13
•
SFP Module Security and Identification, page 43-13
•
Monitoring SFP Module Status, page 43-14
•
• Monitoring Temperature, page 43-14
Using Ping, page 43-14
•
• Using Layer 2 Traceroute, page 43-16
Using IP Traceroute, page 43-17
•
• Using TDR, page 43-19
Using Debug Commands, page 43-20
•
OL-8550-02
Recovery procedures require that you have physical access to the switch.
C H A P T E R
Catalyst 3750 Switch Software Configuration Guide
43
43-1