A device supports three working modes: STP, RSTP, and MSTP. STP and RSTP are not compatible with each other. On a ring network, enable either STP or RSTP.
Procedure
Run system-view
The system view is displayed.
Run stp mode { stp | rstp }
The working mode of the device is set to STP or
RSTP.
By default, the working mode of a device is MSTP. MSTP is compatible with STP and RSTP.