(Optional) Configuring a Port Priority in an MSTI

Context

During spanning tree calculation, port priorities in MSTIs determine which ports are selected as designated ports.

To block a port in an MSTI to eliminate loops, set the port priority to a value larger than the default value. This port will be blocked during designated port selection.

Procedure

Run system-view
The system view is displayed.
Run interface interface-type interface-number
The Ethernet interface view is displayed.
Run stp binding process process-id
The port is bound to an MSTP process.
Run stp [ process process-id ] instance instance-id port priority priority
A port priority is set in an MSTI.

By default, the port priority is 128.

The priority value ranges from 0 to 240, in increments of 16.