Spanning Tree Commands
4-195
4
spanning-tree mst port-priority
This command configures the interface priority on a spanning instance in the
Multiple Spanning Tree. Use the no form to restore the default.
Syntax
spanning-tree mst instance_id port-priority priority
no spanning-tree mst instance_id port-priority
• instance_id - Instance identifier of the spanning tree.
(Range: 1-4094, no leading zeroes)
• priority - Priority for an interface. (Range: 0-240 in steps of 16)
Default Setting
128
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
• This command defines the priority for the use of an interface in the multiple
spanning-tree. If the path cost for all interfaces on a switch are the same, the
interface with the highest priority (that is, lowest value) will be configured as
an active link in the spanning tree.
• Where more than one interface is assigned the highest priority, the interface
with lowest numeric identifier will be enabled.
Example
Related Commands
spanning-tree mst cost (4-194)
spanning-tree protocol-migration
Use this command to re-check the appropriate BPDU format to send on the selected
interface.
Syntax
spanning-tree protocol-migration interface
interface
- ethernet unit/port
- unit - This is device 1.
- port - Port number.
- port-channel channel-id (Range: 1-6)
Console(config)#interface ethernet ethernet 1/5
Console(config-if)#spanning-tree mst 1 port-priority 0
Console(config-if)#
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