X-Ring - Waters Network Systems GSM2109 Operating Manual

5.29

X-ring

X-ring provides a faster redundant recovery than the spanning tree topology. The
action is similar to STP and RSTP, but the algorithms that are used are not the same.
To use the X-ring topology, the X-ring function must be enabled and the switch must
assign two member ports in the ring. One switch in the X-ring group should be set as a
backup switch that one of two member ports will be blocking. That switch is the backup
port, and the other port is the working port. The other switches are working switches
and their two member ports are working ports. If there is a network connection failure,
the backup port will automatically become a working port to recover the failure.
The switch can be set as the ring master or slave. The ring master has the rights to
negotiate and send commands to other switches in the X-ring group. If there are two or
more switches are in master mode, then the software will select the switch with lowest
MAC address as the ring master.
The system also supports a coupling ring that can connect two or more X-ring groups for
redundant backup.
Enable X-ring – use to enable the X-ring function.
Enable Ring Master - enable sets the switch as the ring master. Disable sets the
switch as the slave.
st nd
1 & 2 Ring Ports - select two ports as member ports. One port will be the
working port and one port will be the backup port. The system will automatically
decide which port is the working port and which port is the backup port.
Enable Coupling Ring – use 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.
Enable Dual Homing – Dual homing only works when X-ring is enabled. To
enable the dual homing function, set up one port as the dual homing port. Only one
port can be the dual homing port. Dual-homing provides reliability for your network
by allowing a device to be connected to the network by way of two independent
connection points. One access point is the operating connection and the other is a
Waters Network Systems GSM2109/GSM1009-SFP User's Manual Page 80