Cisco Systems 2960 Manual De Usuario
38-32
Catalyst 2960 and 2960-S Switch Software Configuration Guide
OL-8603-09
Chapter 38 Troubleshooting
Troubleshooting Tables
Troubleshooting Switch Stacks
Note
Stacking is supported only on Catalyst 2960-S switches running the LAN base image.
Table 38-6
Switch Stack Troubleshooting Scenarios
Symptom/problem
How to Verify Problem
Possible Cause/Solution
General troubleshooting of
switch stack issues
switch stack issues
Review this document.
Troubleshooting Switch Stacks
document for problem solutions and tutorial
information.
information.
Switch cannot join stack
Enter the show switch privileged EXEC
command.
command.
Incompatible Cisco IOS versions between
stack members and new switch (see
stack members and new switch (see
).
Enter the show version user EXEC
command.
command.
Incompatible license levels in a Catalyst
3750-E switch (see
3750-E switch (see
Enter the show platform stack-manager
all command.
all command.
Incompatible Cisco IOS version numbers
between stack members and new switch (see
between stack members and new switch (see
).
Look carefully at the cables and
connections.
connections.
Unreliable StackWise cable or incomplete
connection (see
connection (see
Enter the show sdm prefer command.
Configuration mismatch (that is, SDM
templates) if switch was used for other
applications before you added it to the stack.
Incompatible IOS version between stack
members and new switch (see
templates) if switch was used for other
applications before you added it to the stack.
Incompatible IOS version between stack
members and new switch (see
).
StackWise port frequently or
rapidly changing up/down states
(flapping)
rapidly changing up/down states
(flapping)
Error messages report stack link
problems. Possible traffic disruption.
problems. Possible traffic disruption.
Unreliable StackWise cable connection or
interface (see
interface (see
Switch member port not coming
up
up
Enter the show switch detail privileged
EXEC command.
EXEC command.
Unreliable StackWise cable connection or
interface (see
interface (see
Reduced stack ring bandwidth,
or slow throughput between
switch ports or between switches
in the stack.
or slow throughput between
switch ports or between switches
in the stack.
Enter the show switch stack-ring speed
user EXEC command.
user EXEC command.
Bad connection between StackWise cable
connection and switch chassis connector (see
connection and switch chassis connector (see
).
Enter the show switch detail user EXEC
command to see which stack cable or
connection is causing the problem.
command to see which stack cable or
connection is causing the problem.
Defective or missing StackWise cable (see
).
•
Check the retainer screws on the
StackWise cable connectors.
StackWise cable connectors.
•
Enter the show switch privileged
EXEC command to see whether new
switch shows as Ready, Progressing,
or Provisioned.
EXEC command to see whether new
switch shows as Ready, Progressing,
or Provisioned.
•
•
Check status of stack members (see
).