PLANET ISW-1022MPT - Manual (Page 115)

User’s Manual of ISW-1022M Series and ISW-1033MT
5.6.6 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.
5.6.6.1 X-Ring Application
The Industrial Switch supports the X-Ring protocol that can help the network system to recovery from network connection
failure within 20ms or less, and make the network system more reliable. The X-Ring algorithm is similar to spanning tree
protocol (STP) algorithm but its recovery time is faster than STP. The following figure is a sample X-Ring application.
Figure 5-59 X-Ring Application
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