Cisco Nexus 5500 Series Command Reference Manual page 201

Chapter S Commands
spanning-tree port-priority
To set an interface priority when two bridges compete for position as the root bridge, use the
spanning-tree port-priority command. The priority you set breaks the tie. To return to the default
settings, use the no form of this command.
Syntax Description
vlan vlan-id
value
Command Default Port priority default value is 128.
Command Modes Interface configuration mode
Command History Release
5.2(1)N1(1)
Usage Guidelines Do not use the vlan vlan-id parameter on access ports. The software uses the port priority value for
access ports and the VLAN port priority values for trunk ports.
The priority values are 0, 32, 64, 96, 128, 160, 192, and 224. All other values are rejected.
Use this command to configure the port priority for Rapid per VLAN Spanning Tree Plus (Rapid
Note
PVST+) spanning tree mode, which is the default STP mode. To configure the port priority for Multiple
Spanning Tree (MST) spanning tree mode, use the spacing-tree mst port-priority command.
Examples
This example shows how to increase the probability that the spanning tree instance on access port
interface 2/0 is chosen as the root bridge by changing the port priority to 32:
switch(config-if)# spanning-tree port-priority 32
Related Commands Command
show spanning-tree
spanning-tree
interface priority
OL-27880-02
spanning-tree [vlan vlan-id] port-priority value
no spanning-tree [vlan vlan-id] port-priority
(Optional) Specifies the VLAN identification number. The range is from 0
to 4094.
Port priority. The range is from 1 to 224, in increments of 32.
Modification
This command was introduced.
Description
Displays information about the spanning tree state.
Displays information on the spanning tree port priority for the interface.
Cisco Nexus 5500 Series NX-OS Layer 2 Interfaces Command Reference
spanning-tree port-priority
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