Cisco Catalyst 2960 Software Configuration Manual page 206

Troubleshooting Stacks
•
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.
Caution Powering on Switch 4 before enabling the Port 1 on Switch 1 might cause one of the switches to reload.
If Switch 4 is powered on first, you might need to enter the switch 1 stack port 1 enable and the switch
4 stack port 2 enable privileged EXEC commands to bring up the link.
Understanding the show switch stack-ports summary Output
Only Port 1 on stack member 2 is disabled.
Switch# show switch stack-ports summary
Switch#/
Port#
--------
1/1
1/2
2/1
2/2
3/1
3/2
Table 7-5
Field
Switch#/Port#
Stack Port Status
Neighbor
Catalyst 2960 and 2960-S Switches Software Configuration Guide, Release 15.0(1)SE
7-24
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.
Stack Neighbor
Port
Status
------ --------
OK 3
Down None
Down None
OK 3
OK 2
OK 1
show switch stack-ports summary Command Output
Description
Member number and its stack port number.
Switch number of the active member at the other end of the stack cable.
Cable Link Link
Length OK Active
-------- ---- ------
50 cm Yes Yes
3 m Yes No
3 m Yes No
50 cm Yes Yes
50 cm Yes Yes
50 cm Yes Yes
Absent—No cable is detected on the stack port.
•
Down—A cable is detected, but either no connected neighbor is up,
•
or the stack port is disabled.
OK—A cable is detected, and the connected neighbor is up.
•
Chapter 7 Managing Switch Stacks
Sync # In
OK Changes Loopback
To LinkOK
---- --------- --------
Yes 1 No
Yes 1 No
Yes 1 No
Yes 1 No
Yes 1 No
Yes 1 No
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