Interface instance configuration: configure the enable of the instance on the port.
Screen as blew:
Interface configuration: configure the enabled port of spanning tree protocol and the
enabled port of BPDU message. Screen as blew:
5.6 Loop Protection
Global Configuration: enable and set loop protection, screen as blew:
Port Configuration: enable the loop protection function on the port.
The loop protection includes double fiber ring protection and four fiber ring
protection.