Cisco Catalyst 3120 User Manual

CHAPTER
47-1
Cisco Catalyst Blade Switch 3120 for HP Software Configuration Guide
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47
Troubleshooting
This chapter describes how to identify and resolve software problems related to the Cisco IOS software
on the 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.
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 Command Summary, Release 12.2.
This chapter consists of these sections:
• Recovering from a Software Failure, page 47-2
• Recovering from a Lost or Forgotten Password, page 47-3
• Preventing Switch Stack Problems, page 47-8
Note Recovery procedures require that you have physical access to the switch.
• Preventing Autonegotiation Mismatches, page 47-9
• SFP Module Security and Identification, page 47-9
• Monitoring SFP Module Status, page 47-10
• Monitoring Temperature, page 47-10
• Using Ping, page 47-10
• Using Layer 2 Traceroute, page 47-12
• Using IP Traceroute, page 47-13
• Using TDR, page 47-15
• Using Debug Commands, page 47-16
• Using the show platform forward Command, page 47-18
• Using the crashinfo Files, page 47-21
• Using On-Board Failure Logging, page 47-22

Cisco Catalyst 3120 Specifications

General

Brand	Cisco
Model	Catalyst 3120
Category	Switch
Language	English