Failure Detection

Ethernet ring operation depends on quick and accurate failure detection. The failure condition signal failure (SF) is supported. For SF detection, an Ethernet continuity check MEP must be configured for each ring link. For fast protection switching, a 10 ms transmission period for this MEP group is supported. OAM monitors the MEP group's MA and reports SF or SF clear events to the Ethernet ring control module. For this MEP group, the action profile must be configured to update the interface device IFF_LINKDOWN flag. OAM updates the IFF_LINKDOWN flag to notify the Ethernet ring control module.

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