Specifications

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Catalyst 2950 and Catalyst 2955 Switch Command Reference

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Chapter 2 Cisco IOS Commands

spanning-tree mst hello-time

Use the spanning-tree mst hello-time global configuration command to set the interval between hello

bridge protocol data units (BPDUs) sent by root switch configuration messages. Use the no form of this

command to return to the default setting.

spanning-tree mst hello-time seconds

no spanning-tree mst hello-time

This command is available only if your switch is running the enhanced software image (EI).

Syntax Description

Defaults The default is 2 seconds.

Command Modes Global configuration

Command History

Usage Guidelines After you set the spanning-tree mst max-age seconds global configuration command, if a switch does

not receive BPDUs from the root switch within the specified interval, the switch recomputes the

spanning-tree topology. The max-age setting must be greater than the hello-time setting.

Changing the spanning-tree mst hello-time command affects all spanning-tree instances.

Examples This example shows how to set the spanning-tree hello time to 3 seconds for all MST instances:

Switch(config)# spanning-tree mst hello-time 3

You can verify your settings by entering the show spanning-tree mst privileged EXEC command.

seconds Interval between hello BPDUs sent by root switch configuration messages. The

range is 1 to 10 seconds.

Release Modification

12.1(9)EA1 This command was first introduced.