Alaxala AX2200S Series Configuration Manual page 398

20 Description of the Ring Protocol
Figure 20-23 Operation when multi-faults occur
(a) Operation for each node in a shared link monitoring ring
1. A multi-fault is detected for the shared link monitoring ring.
Shared nodes can no longer receive multi-fault monitoring frames for both ring ports,
and a multi-fault is detected.
(b) Operation for each node in a backup ring
2. HC(S) sending is stopped.
The shared node detecting the multi-fault stops sending backup ring HC(S)s.
(3) Operation for switching to the backup ring
The following figure shows operation for switching to the backup ring due to multi-fault
detection.
Figure 20-24 Switching to the backup ring
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