Spanning-Tree Mst Priority - Cisco Catalyst 3750 Command Reference Manual

Chapter 2 Catalyst 3750 Switch Cisco IOS Commands

spanning-tree mst priority

Use the spanning-tree mst priority global configuration command on the switch stack or on a
standalone switch to set the switch priority for the specified spanning-tree instance. Use the no form of
this command to return to the default setting.
Syntax Description
instance-id
priority
Defaults The default is 32768.
Command Modes
Global configuration
Command History Release
12.1(14)EA1
Examples
This example shows how to set the spanning-tree priority to 8192 for multiple spanning-tree instances
(MST) 20 to 21:
Switch(config)# spanning-tree mst 20-21 priority 8192
You can verify your settings by entering the show spanning-tree mst instance-id privileged EXEC
command.
Related Commands Command
show spanning-tree
spanning-tree mst cost
spanning-tree mst port-priority
78-16181-01
spanning-tree mst instance-id priority priority
no spanning-tree mst instance-id priority
Range of spanning-tree instances. You can specify a single instance, a range of
instances separated by a hyphen, or a series of instances separated by a comma. The
range is 0 to 15.
Set the switch priority for the specified spanning-tree instance. This setting affects
the likelihood that the switch is selected as the root switch. A lower value increases
the probability that the switch is selected as the root switch.
The range is 0 to 61440 in increments of 4096. Valid priority values are 0, 4096,
8192, 12288, 16384, 20480, 24576, 28672, 32768, 36864, 40960, 45056, 49152,
53248, 57344, and 61440. All other values are rejected.
Modification
This command was introduced.
mst instance-id
Description
Displays MST information for the specified interface.
Sets the path cost for MST calculations.
Configures an interface priority.
Catalyst 3750 Switch Command Reference
spanning-tree mst priority
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