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CHAPTER
28-1
Catalyst 2950 Desktop Switch Software Configuration Guide
78-14982-01
28
Troubleshooting
This chapter describes how to identify and resolve software problems related to the IOS software.
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. To identify and resolve Cisco-approved
Course Wave Division Multiplexer (CWDM) Gigabit Interface Converter (GBIC) problems, you must
have the enhanced software image (EI) installed on your switch.
Note For complete syntax and usage information for the commands used in this chapter, refer to the command
reference for this release and the Cisco IOS Command Summary for Release 12.1.
This chapter consists of these sections:
• LRE Statistics, page 28-1
• Using Recovery Procedures, page 28-6
• Preventing Autonegotiation Mismatches, page 28-12
• Troubleshooting LRE Port Configuration, page 28-12
• GBIC and SFP Module Security and Identification, page 28-13
• Using Debug Commands, page 28-14
• Using the crashinfo File, page 28-15
LRE Statistics
This section describes the statistics you can retrieve from the switch and from connected LRE CPE
devices. Use the show controllers ethernet-controller, show controllers ethernet-controller <LRE
interface> cpe [port <port-num>] and show controllers lre status privileged EXEC commands to
display these statistics:
• Table 28-1 shows Ethernet port statistics
• Table 28-2 shows LRE link statistics
• Table 28-3 shows CPE Ethernet link statistics