Troubleshooting guide

6 Advanced System Diagnostics and Troubleshooting Guide
Contents
System Impacts of the Transceiver Diagnostics 83
Network Impact of the Transceiver Diagnostics 83
Viewing Diagnostics Results 84
Example Log Messages for Transceiver Diagnostic Failures 84
Examples, show diagnostics Command 85
Example—show switch Command 86
Transceiver Diagnostic Result Analysis 87
FDB Scan 88
Usage Guidelines 88
Related Commands 89
Enabling FDB Scanning 89
Disabling FDB Scanning 89
Configuring the FDB Scan Diagnostics 90
System Impact of the FDB Scan Diagnostic 90
Network Impact of the FDB Scan Diagnostic 90
Viewing Diagnostics Results 91
Example Log Messages for FDB Scan Diagnostic Failures 91
Example FDB Scan Results from the show diagnostics Command 91
Example Output from the show switch command 92
Example Output from the show fdb remap Command 92
Chapter 6 Additional Diagnostics Tools
Temperature Logging for Modular Switches 93
Related Commands 93
System Impacts of Temperature Logging 94
Network Impact of Temperature Logging 94
Syslog Servers 94
Related Commands 94
Enabling Logging to Remote Syslog Server Targets 94
Disabling Logging to Remote Syslog Server Targets 95
Adding a Syslog Server 95
Deleting a Remote Syslog Server 95
System Impact of the Syslog Server Facility 95
Network Impact of the Syslog Server Facility 96
Cable Diagnostics 96
Cable Diagnostics for the High-Density Gigabit Ethernet I/O Modules in “i” Series
Switches 96
Related Commands 96
Running Cable Diagnostics 97
Viewing and Interpreting CDM Test Data 98
Cable Diagnostics for “e” Series Switches 101
Chapter 7 Troubleshooting Guidelines
Contacting Extreme Technical Support 103
Americas TAC 103