ALARM INDICATION AND SUPPRESSION (AIS) MECHANISM IN AN ETHERNET OAM NETWORK

摘要

A system and method for propagating fault information in an Ethernet OAM network having multiple levels of OAM domains. An Alarm Indication and Suppression (AIS) frame is generated by a Maintenance Intermediate Point (MIP) node upon detecting a fault condition in a first OAM domain, which is transmitted to one or more Maintenance End Points (MEPs) of the first OAM domain. Upon receiving the AIS frames, the MEP nodes are operable generate another AIS frame for propagating to an adjacent higher level second OAM domain. Responsive to the AIS frame from the lower level first OAM domain, any alarms caused in the second OAM domain due to the fault condition in the first OAM domain are suppressed.

主权项

1. A method operable in a Maintenance End Point (MEP) node configured for an Ethernet network, wherein the Ethernet network is logically segmented into a plurality of maintenance entity groups (MEGs) having assigned MEG levels and the MEP node is associated with at least a first MEG and having a first assigned MEG level, the method comprising:
detecting a loss of continuity (LOC) in the first MEG by the MEP node, wherein the MEP is operable to detect a loss of continuity based on a continuity check (CC) frame loss for a predetermined interval from one or more peer MEP nodes associated with at least the first MEG; receiving an Ethernet AIS frame by the MEP node; and suppressing loss of continuity alarms for the one or more peer MEPs associated with at least the first MEG.