Comnet CNGE8FX4TX4MS, Installation And Operation Manual

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97
X-Ring
X-Ring provides a faster redundant recovery than Spanning Tree topology. The action is
similar to STP or RSTP, but the algorithms not the same.
In the X-Ring topology, every switch should enable the X-Ring function and assign two
member ports in the ring. Only one switch in the X-Ring group would be set as a master
switch that would be blocked, called the backup port, and another port is called the working
port. Other switches in the X-Ring group are called working switches and their two member
ports are called working ports. When the failure of a network connection occurs, the backup
port will automatically become a working port to recover the network from the failure.
The switch supports the functions and acts as an interface for setting the switch as the ring
master or slave mode. The ring master can negotiate and place commands to other switches
in the X-Ring group. If there are 2 or more switches in master mode, then software will select
the switch with lowest MAC address number as the ring master. The X-Ring master ring
mode will be enabled by the X-Ring configuration interface. Also, user 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 X-Ring groups for the
redundant backup function and the dual homing function that prevents a connection loss
between the X-Ring group and the upper level/core switch.

Enable X-Ring:
To enable the X-Ring function, select the check box that enables the
X-Ring function.

Enable Ring Master: Select the check box to enable this machine to be identified as a
ring master.

1 st & 2 nd Ring Ports: Pull down the selection menu to assign two ports as the member
ports. 1 st Ring Port is the working port and 2 nd Ring Port is the backup port. When 1 st
Ring Port fails, the system will automatically select the 2 nd Ring Port to be the working
port.