Spanning-Tree Mst Hello-Time - Cisco Catalyst 3560-X Command Reference Manual
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spanning-tree mst hello-time
spanning-tree mst hello-time
Syntax Description
Defaults
Command Modes
Command History
Usage Guidelines
Examples
Related Commands
Catalyst 3750-X and 3560-X Switch Command Reference
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Use the spanning-tree mst hello-time global configuration command on the switch stack or on a
standalone switch 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
seconds
Interval between hello BPDUs sent by root switch configuration messages. The
range is 1 to 10 seconds.
The default is 2 seconds.
Global configuration
Release
Modification
12.2(53)SE2
This command was introduced.
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.
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.
Command
show spanning-tree
mst
spanning-tree mst
forward-time
spanning-tree mst max-age
spanning-tree mst max-hops
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Chapter 2 Catalyst 3750-X and 3560-X Cisco IOS Commands
Description
Displays MST information.
Sets the forward-delay time for all MST instances.
Sets the interval between messages that the spanning tree receives
from the root switch.
Sets the number of hops in a region before the BPDU is discarded.
OL-21522-02
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