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Cisco ME 3800X and ME 3600X Switch Command Reference
OL-28238-01
Chapter
spanning-tree mst hello-time
spanning-tree mst hello-time
To set the interval between hello bridge protocol data units (BPDUs) sent by root switch configuration
messages, use the spanning-tree mst hello-time command in global configuration mode. To return to
the default setting, use the no form of this command.
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.
You can verify your setting by entering the show spanning-tree mst privileged EXEC command.
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
Related Commands
seconds Interval between hello BPDUs sent by root switch configuration messages. The
range is 1 to 10 seconds.
Release Modification
12.2(52)EY 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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