Troubleshooting Stacks; Manually Disabling A Stack Port; Re-Enabling A Stack Port While Another Member Starts - Cisco Catalyst 2975 Software Configuration Manual

Chapter 6 Managing Switch Stacks

Troubleshooting Stacks

•
•
•
•
•

Manually Disabling a Stack Port

If a stack port is flapping and causing instability in the stack ring, to disable the port, enter the switch
stack-member-number stack port port-number disable privileged EXEC command. To re-enable the
port, enter the switch stack-member-number stack port port-number enable command.
Be careful when using the switch stack-member-number stack port port-number disable command.
Note
When you disable the stack port, the stack operates at half bandwidth.
•
•
When you enter the switch stack-member-number stack port port-number disable privileged EXEC
command and
•
•

Re-Enabling a Stack Port While Another Member Starts

Stack Port 1 on Switch 1 is connected to Port 2 on Switch 4. If Port 1 is flapping, disable Port 1 with the
switch 1 stack port 1 disable privileged EXEC command.
While Port 1 on Switch 1 is disabled and Switch 1 is still powered on:
1.
2.
3.
4.
5.
6.
OL-19720-02
Manually Disabling a Stack Port, page 6-23
Re-Enabling a Stack Port While Another Member Starts, page 6-23
Understanding the show switch stack-ports summary Output, page 6-24
Identifying Loopback Problems, page 6-25
Finding a Disconnected StackWiseStackCable, page 6-28
A stack is in the full-ring state when all members are connected through the stack ports and are in
the ready state.
The stack is in the partial-ring state when
All members are connected through the stack ports, but some all are not in the ready state.
–
Some members are not connected through the stack ports.
–
The stack is in the full-ring state, you can disable only one stack port. This message appears:
Enabling/disabling a stack port may cause undesired stack changes. Continue?[confirm]
The stack is in the partial-ring state, you cannot disable the port. This message appears:
Disabling stack port not allowed with current stack configuration.
Disconnect the stack cable between Port 1 on Switch 1 and Port 2 on Switch 4.
Remove Switch 4 from the stack.
Add a switch to replace Switch 4 and assign it switch-number 4.
Reconnect the cable between Port 1 on Switch 1 and Port 2 on Switch 4 (the replacement switch).
Re-enable the link between the switches. Enter the switch 1 stack port 1 enable privileged EXEC
command to enable Port 1 on Switch 1.
Power on Switch 4.
Catalyst 2975 Switch Software Configuration Guide
Troubleshooting Stacks
6-23