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Catalyst 2350 Switch Command Reference
OL-19055-01
Chapter 2 Catalyst 2350 Cisco IOS Commands
spanning-tree mst root
When you enter the
spanning-tree mst
instance-id
root secondary
command, because of support for
the extended system ID, the software changes the switch priority from the default value (32768) to
28672. If the root switch fails, this switch becomes the next root switch (if the other switches in the
network use the default switch priority of 32768 and are therefore unlikely to become the root switch).
Examples
This example shows how to configure the switch as the root switch for instance 10 with a network
diameter of 4:
Switch(config)#
spanning-tree mst 10 root primary diameter 4
This example shows how to configure the switch as the secondary root switch for instance 10 with a
network diameter of 4:
Switch(config)#
spanning-tree mst 10 root secondary diameter 4
You can verify your settings by entering the
show spanning-tree mst
instance-id
privileged EXEC
command.
Related Commands
Command
Description
show spanning-tree
mst
instance-id
Displays MST information for the specified instance.
spanning-tree mst forward-time
Sets the forward-delay time for all MST instances.
spanning-tree mst hello-time
Sets the interval between hello BPDUs sent by root switch
configuration messages.
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.
