Cisco CATALYST 2960 - Chapter 2 Using the Command-Line Interface; Searching and Filtering Output of show and more Commands; Accessing the CLI; You manage the switch stack and the stack member interfaces through the stack master. You cannot manage stack members on an individual switch basis. You can connect to the stack master through the console port of one or more stack members. Be careful with using multiple CLI sessions to the stack master. Commands that you enter in one session are not displayed in the other sessions. Therefore, it is possible to lose track of the session from which you entered commands.

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Catalyst 2960 Switch Command Reference
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Chapter 2 Catalyst 2960 Switch Cisco IOS Commands
cluster timer
cluster timer
Use the cluster timer global configuration command to set the interval in seconds between heartbeat
messages. Use the no form of this command to set the interval to the default value.
cluster timer interval-in-secs
no cluster timer
Syntax Description
Defaults The interval is 8 seconds.
Command Modes Global configuration
Command History
Usage Guidelines Enter this command with the cluster holdtime global configuration command only on the cluster
command switch. The cluster command switch propagates the values to all its cluster members so that
the setting is consistent among all switches in the cluster.
The holdtime is typically set as a multiple of the heartbeat interval timer (cluster timer). For example,
it takes (holdtime-in-secs divided by the interval-in-secs) number of heartbeat messages to be missed in
a row to declare a switch down.
Examples This example shows how to change the heartbeat interval timer and the duration on the cluster command
switch:
Switch(config)# cluster timer 3
Switch(config)# cluster holdtime 30
You can verify your settings by entering the show cluster privileged EXEC command.
Related Commands
interval-in-secs Interval in seconds between heartbeat messages. The range is 1 to 300
seconds.
Release Modification
12.2(25)FX This command was introduced.
Command Description
show cluster Displays the cluster status and a summary of the cluster to which the switch
belongs.