Transition Networks
SISTM1040-262D-LRT
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105
6.23 X-Ring
X-Ring provides a faster redundant recovery than Spanning Tree topology. The action is
similar to STP or RSTP, but the algorithms between them are not the same. In the X-
Ring topology, every switch should be enabled with X-Ring function and two ports
should be assigned as the member ports in the ring. Only one switch in the X-Ring group
would be set as the master switch that one of its two member ports would be blocked,
called backup port, and another port is called 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 network connection occurs, the backup port of the master switch
(Ring Master) will automatically become a working port to recover from the failure.
The switch supports the function and interface for setting the switch as the ring master or
not. The ring master can negotiate and place command to other switches in the X-Ring
group. If there are 2 or more switches in master mode, the software will select the switch
with lowest MAC address number as the ring master. The X-Ring master ring mode can
be enabled by setting the X-Ring configuration interface. Also, the user can identify
whether the switch is the ring master by checking the R.M. LED indicator on the panel of
the switch.
The system also supports the
Couple Ring
that can connect 2 or more X-Ring group for
the redundant backup function;
Dual Homing
function that can prevent connection lose
between X-Ring group and upper level/core switch. Apart from the advantages,
Central
Ring
can handle 2 rings in the system and has the ability to recover from failure within
20 milliseconds.
Enable Ring:
To enable the X-Ring function, tick the checkbox beside the
Enable
Ring
string label. If this checkbox is not ticked, all the ring functions are unavailable.
Enable Ring Master:
Tick the checkbox to enable this switch to be the ring
master.
1
st
& 2
nd
Ring Ports:
Pull down
the selection menu to assign the ports as the
member ports.
1
st
Ring Port
is the working port and
2
nd
Ring Port
is the
