Configuring port role restriction
![[CAUTION: ]](images/caution.png) | CAUTION: Use this feature with caution, because enabling port role restriction on a port might affect the connectivity of the spanning tree topology. | |
The bridge ID change of a device in the user access network might cause a change to the spanning tree topology in the core network. To avoid this problem, you can enable port role restriction on a port. With this feature enabled, when the port receives a superior BPDU, it becomes an alternate port rather than a root port.
Make this configuration on the port that connects to the user access network.
To configure port role restriction:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter Layer 2 Ethernet interface or Layer 2 aggregate interface view. | interface interface-type interface-number | N/A |
3. Enable port role restriction. | stp role-restriction | By default, port role restriction is disabled. |