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Figure 20-14 Operation during shared link recovery
(a) Master node operation for shared link monitoring rings
When a ring fault has been detected, and the master node receives an HC(M) it sent itself,
it determines that recovery from the ring fault has occurred. As with a single ring, the
following restoration operations are performed:
1. The VLAN status of the ring for data transfer is changed.
2. Flush control frames are sent.
3. The MAC address table is cleared.
4. The monitoring status is changed.
(b) Transit node operation for shared link monitoring rings
As with single rings, the following operations are performed when a flush control frame sent
from the master node is received:
5. Flush control frames are transferred.
6. The MAC address table is cleared.
(c) Master node and transit node operation for shared link non-monitoring rings
Because the master node in a shared link non-monitoring ring does not detect ring faults,
no restoration is performed, including for transit nodes.
20.4.3 Operation for faults and restoration other than for shared links in a
shared link non-monitoring ring
The following explains faults and restoration other than for shared links, for shared link
non-monitoring rings.
(1) Operation when a fault is detected
The following figure shows operation when a fault is detected other than for shared links on
shared link non-monitoring rings.
20 Description of the Ring Protocol
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