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PANNING
T
REE
C
OMMANDS
4-231
MSTI region as a single node, connecting all regions to the Common
Spanning Tree.
Example
mst priority
This command configures the priority of a spanning tree instance. Use the
no form to restore the default.
Syntax
mst instance_id priority priority
no mst instance_id priority
• instance_id - Instance identifier of the spanning tree. (Range: 0-4094)
• priority - Priority of the a spanning tree instance.
(Range: 0-61440 in steps of 4096; Options: 0, 4096, 8192, 12288,
16384, 20480, 24576, 28672, 32768, 36864, 40960, 45056, 49152,
53248, 57344, 61440)
Default Setting
32768
Command Mode
MST Configuration
Command Usage
• MST priority is used in selecting the root bridge and alternate bridge of
the specified instance. The device with the highest priority (i.e., lowest
numerical value) becomes the MSTI root device. However, if all devices
have the same priority, the device with the lowest MAC address will then
become the root device.
• You can set this switch to act as the MSTI root device by specifying a
priority of 0, or as the MSTI alternate device by specifying a priority of
16384.
Console(config-mstp)#mst 1 vlan 2-5
Console(config-mstp)#