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Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-02
Chapter 45 Troubleshooting
Recovering from a Command Switch Failure
If this prompt does not appear, enter enable, and press Return. Enter setup, and press Return to start
the setup program.
Step 11 Respond to the questions in the setup program.
When prompted for the hostname, recall that on a command switch, the hostname is limited to
28 characters; on a member switch to 31 characters. Do not use -n, where n is a number, as the last
characters in a hostname for any switch.
When prompted for the Telnet (virtual terminal) password, recall that it can be from 1 to 25
alphanumeric characters, is case sensitive, allows spaces, but ignores leading spaces.
Step 12 When prompted for the enable secret and enable passwords, enter the passwords of the failed command
switch again.
Step 13 When prompted, make sure to enable the switch as the cluster command switch, and press Return.
Step 14 When prompted, assign a name to the cluster, and press Return.
The cluster name can be 1 to 31 alphanumeric characters, dashes, or underscores.
Step 15 After the initial configuration displays, verify that the addresses are correct.
Step 16 If the displayed information is correct, enter Y, and press Return.
If this information is not correct, enter N, press Return, and begin again at Step 9.
Step 17 Start your browser, and enter the IP address of the new command switch.
Step 18 From the Cluster menu, select Add to Cluster to display a list of candidate switches to add to the cluster.
Replacing a Failed Command Switch with Another Switch
To replace a failed command switch with a switch that is command-capable but is not part of the cluster,
follow these steps:
Step 1 Insert the new switch in place of the failed command switch, and duplicate its connections to the cluster
members.
Step 2 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 11-12 and the hardware configuration guide.
Step 3 At the switch prompt, enter privileged EXEC mode:
Switch> enable
Switch#
Step 4 Enter the password of the failed command switch.
Step 5 Use the setup program to configure the new 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