
21AT-IFS802SP-80 User Manual
4.2 Coupling Ring Application
In the network, it may have more than one X-Ring group. By using the coupling ring function, it can
connect each X-Ring for the redundant backup. It can ensure the transmissions between two ring
groupsnottofail.Thefollowinggureisasampleofcouplingringapplication.Thecoupleringconsists
of four switches—switch 1 ~ switch 4—which are connected to each other via the paths in red. Please
note that the Coupling Ring Backup Path between switch 1 and switch 3 is blocked; it will work
only when the path between switch 2 and switch 4 is broken or disconnected.
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