stp port priority

Use stp port priority to set the priority of a port. The port priority affects the role of a port in a spanning tree.

Use undo stp port priority to restore the default.

Syntax

stp [ instance instance-list | vlan vlan-id-list ] port priority priority

undo stp [ instance instance-list | vlan vlan-id-list ] port priority

Default

The port priority is 128.

Views

Layer 2 Ethernet interface view, Layer 2 aggregate interface view

Predefined user roles

network-admin

Parameters

instance instance-list: Specifies a space-separated list of up to 10 MSTI items. Each item specifies an MSTI or a range of MSTIs in the form of instance-id1 [ to instance-id2 ]. The value for instance-id2 must be equal to or greater than the value for instance-id1. The value range for the instance-id argument is 0 to 4094, and the value 0 represents the CIST.

vlan vlan-id-list: Specifies a space-separated list of up to 10 VLAN items. Each item specifies a VLAN or a range of VLANs in the form of vlan-id1 [ to vlan-id2 ]. The value for vlan-id2 must be equal to or greater than the value for vlan-id1. The value range for the vlan-id argument is 1 to 4094.

priority: Specifies the port priority in the range of 0 to 240 in increments of 16 (as in 0, 16, 32).

Usage guidelines

The smaller the value, the higher the port priority. If all ports on your device use the same priority value, the port priority depends on the port index. The smaller the index, the higher the priority.

When the command is configured in Layer 2 Ethernet interface view, it takes effect only on that interface.

When the command is configured in Layer 2 aggregate interface view, it takes effect only on the aggregate interface.

When the command is configured on a member port in an aggregation group, it takes effect only after the port leaves the aggregation group.

If you do not specify an MSTI or VLAN, this command configures the priority of the ports in the MSTP CIST or in the STP or RSTP spanning tree.

Examples

# In MSTP mode, set the priority of port Ten-GigabitEthernet 1/0/3 to 16 in MSTI 2.

<Sysname> system-view
[Sysname] interface ten-gigabitethernet 1/0/3
[Sysname-Ten-GigabitEthernet1/0/3] stp instance 2 port priority 16

# In PVST mode, set the priority of port Ten-GigabitEthernet 1/0/3 to 16 in VLAN 2.

<Sysname> system-view
[Sysname] interface ten-gigabitethernet 1/0/3
[Sysname-Ten-GigabitEthernet1/0/3] stp vlan 2 port priority 16

Related commands

display stp