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Redundant ring
Redundant ring provide a faster redundant recovery than Spanning Tree
topology. The action is similar with STP or RSTP, but the algorithms not the
same.
In the redundant ring topology, every switch should enable redundant ring
function and assign two member ports in the ring. Only one switch in the
redundant ring group would be set as a backup switch that one of two member
ports would be blocking, called backup port, and another port is called working
port. Other switches are called working switches
and their two member ports
are called working ports. When the network connection failure, the backup port
will automatically become a working port to recovery the failure.
The switch supports one Dipswitch for configuring the switch as the ring master
or slave mode. The ring master has the rights to negotiate and place command
to other switches in the redundant ring group. If there are 2 or more switches
are in master mode, then software will select the switch with lowest MAC
address number as the ring master. The redundant ring master ring mode will
be enabling by the DIP Switch. When the switch is set to the master ring mode,
the redundant ring configuration interface will display the switch as the master
ring message. Also, you can identify the switch as the ring master from the R.M.
LED panel of the LED panel on the switch.
The system also supports the coupling ring that can connect 2 or more
redundant ring group for the redundant backup function and dual homing
function that prevent connection lose between redundant ring group and upper
