Cisco Catalyst 3560-X Software Configuration Manual page 164

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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:

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#

Stack Port Status

Cable Length

Catalyst 3750-X and 3560-X Switch Software Configuration Guide

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.

show switch stack-ports summary Command Output

Member number and its stack port number.

Switch number of the active member at the other end of the stack cable.

Valid lengths are 50 cm, 1 m, or 3 m.

If the switch cannot detect the cable length, the value is no cable. The

cable might not be connected, or the link might be unreliable.

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.

Managing Switch Stacks

Troubleshooting

Catalyst 3750-x