Chapter 45 Troubleshooting

Recovering from a Command Switch Failure

Replacing a Failed Command Switch with a Cluster Member

To replace a failed command switch with a command-capable member in the same cluster, follow these steps:

Step 1 Disconnect the command switch from the member switches, and physically remove it from the cluster.

Step 2 Insert the member switch in place of the failed command switch, and duplicate its connections to the cluster members.

Step 3 Start a CLI session on the new command switch.

You can access the CLI by using the console port, by using the Ethernet management port, or, if an IP address has been assigned to the switch, by using Telnet. For details about using the console port, see the switch hardware installation guide. For details about using the Ethernet management port, see the “Ethernet Management Port” section on page 11-12and the hardware installation guide.

Step 4 At the switch prompt, enter privileged EXEC mode:

Switch> enable

Switch#

Step 5 Enter the password of the failed command switch.

Step 6 Enter global configuration mode.

Switch# configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

Step 7 Remove the member switch from the cluster.

Switch(config)# no cluster commander-address

Step 8 Return to privileged EXEC mode.

Switch(config)# end

Switch#

Step 9 Use the setup program to configure the switch IP information. This program prompts you for IP address information and passwords. From privileged EXEC mode, enter setup, and press Return.

Switch# setup

--- System Configuration Dialog ---

Continue with configuration dialog? [yes/no]: y

At any point you may enter a question mark '?' for help.

Use ctrl-c to abort configuration dialog at any prompt.

Default settings are in square brackets '[]'.

Basic management setup configures only enough connectivity for management of the system, extended setup will ask you to configure each interface on the system

Would you like to enter basic management setup? [yes/no]:

Step 10 Enter Y at the first prompt.

The prompts in the setup program vary depending on the member switch that you selected to be the command switch:

Continue with configuration dialog? [yes/no]: y

or

Configuring global parameters:

 

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

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Cisco Systems 3750E manual Replacing a Failed Command Switch with a Cluster Member, 45-10