The system also supports the coupling ring that can connect 2 or more super ring group for the redundant backup function.
Enable Super ring: to enable the super ring function.
Enable Ring Master: Enable means the switch is ring master. Disable means the switch is slave.
1st & 2nd Ring Port: select two ports as the member ports. One port will be working port and one port will be the backup port. The system will automatically decide which port is working port and which port is backup port.
Enable Coupling Ring: to enable the coupling ring function.
Coupling port: select the member port.
Control port: select the switch as the master switch in the coupling ring.
Click
Apply 
.
Super ring Interface
[NOTE] When you enable the super ring function, you must disable the RSTP. The super ring function and RSTP function cannot exist at the same time.
