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Cisco IE 3000 Switch Command Reference
OL-13019-01
Chapter 2 IE 3000 Switch Cisco IOS Commands
spanning-tree mst hello-time
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
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 multiple spanning-tree
(MST) instances:
Switch(config)# spanning-tree mst hello-time 3
You can verify your setting by entering the show spanning-tree mst privileged EXEC command.
Related Commands
seconds Interval between hello BPDUs sent by root switch configuration messages. The
range is 1 to 10 seconds.
Release Modification
12.2(44)EX This command was introduced.
Command Description
show spanning-tree mst Displays MST information.
spanning-tree mst
forward-time
Sets the forward-delay time for all MST instances.
spanning-tree mst max-age Sets the interval between messages that the spanning tree receives
from the root switch.
spanning-tree mst max-hops Sets the number of hops in a region before the BPDU is discarded.
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