Setting the priority for a port in a specified MST instance


spanning-tree instance 1..16 port-list priority priority-multiplier

Sets the priority for the specified ports in the specified MST instance.

For a given port, the priority setting can be different for different MST instances to which the port may belong. The priority range for a port in a given MST instance is 0 - 255. However, this command specifies the priority as a multiplier (0 - 15) of 16. When you specify a priority multiplier of 0 - 15, the actual priority assigned to the switch is: (priority-multiplier) x 16

Setting priority for a port in a specified MST instance

If you configure 2 as the priority multiplier on a given port in an MST instance, then the actual Priority setting is 32x. After you specify the port priority multiplier in an instance, the switch displays the actual port priority and not the multiplier in the show spanning-tree instance 1..16 or show spanning-tree port-list instance 1..16 displays.

You can view the actual multiplier setting for ports in the specified instance by executing show running and looking for an entry in the following format:

spanning-tree instance 1..15 port-list priority priority-multiplier

For example, configuring port A2 with a priority multiplier of 3 in instance 1, results in this line in the show running output:

spanning-tree instance 1 A2 priority 3