Spanning-Tree Mst Max-Age - Cisco ME 3800X Command Reference Manual

spanning-tree mst max-age

spanning-tree mst max-age
To set the interval between messages that the spanning tree receives from the root switch, use the
spanning-tree mst max-age command in global configuration mode. If a switch does not receive a
bridge protocol data unit (BPDU) message from the root switch within this interval, it recomputes the
spanning-tree topology. To return to the default setting, use the no form of this command.
Syntax Description seconds
Defaults
The default is 20 seconds.
Command Modes
Global configuration
Command History Release
12.2(52)EY
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 max-age 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 max-age to 30 seconds for all multiple spanning-tree
(MST) instances:
Switch(config)# spanning-tree mst max-age 30
Related Commands Command
show spanning-tree mst
spanning-tree mst forward-time
spanning-tree mst hello-time
spanning-tree mst max-hops
Cisco ME 3800X and ME 3600X Switch Command Reference
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spanning-tree mst max-age seconds
no spanning-tree mst max-age
Interval between messages the spanning tree receives from the root switch. The range is
6 to 40 seconds.
Modification
This command was introduced.
Description
Displays MST information.
Sets the forward-delay time for all MST instances.
Sets the interval between hello BPDUs sent by root switch
configuration messages.
Sets the number of hops in a region before the BPDU is
discarded.
Chapter
OL-28238-01