Cisco Catalyst 2960 Software Configuration Manual page 922

Troubleshooting Tables
Table 39-7 Switch Stack Troubleshooting Scenarios (continued)
Symptom/problem
Slow traffic throughput on stack
ring
Problems with stack master
election. stacks merging, or new
switches joining stack
Stack members need to be
upgraded.
StackWise link connection
problems
Catalyst 2960 and 2960-S Switches Software Configuration Guide, Release 15.0(1)SE
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How to Verify Problem
Test the switch interface.
Review the rules of stack master election. Current stack master is rebooted or
Port numbering seems off.
Enter the show switch privileged EXEC
command.
Stack members running different major
or minor versions of the Cisco IOS
software.
Look at the LED behavior.
Chapter 39
Possible Cause/Solution
Defective StackWise switch interface.
The only solution is to replace the
Note
switch.
disconnected.
Verify port numberin.
Interpret state messages..
Defective StackWise switch interface or cable.
Stack not operating at full bandwidth.
Troubleshooting
OL-26520-01