Mechanism indication and alarm suppression (AIS) in an Ethernet OAM

A method of propagating fault information in an Ethernet (100) network having multiple nivelesjerarquicos designated domain of Operations, Administration and Maintenance, OAM, wherein cadadominio OAM is limited by nodes Endpoint Maintenance, MEP, limiting a plurality denodos midpoint Maintenance, MIP, comprising: transmitting a first frame of display ySupresion Alarm, AIS, Ethernet, by means of at least one MIP node disposed in a first dominioOAM lower hierarchy level on Ethernet (100) after detecting a fault in said first OAM domain denivel lower hierarchical, for receipt by at least one MEP node bounding said first domain which OAM; trasrecibir said first Ethernet AIS frame, generated by said at least one MEP node bounding said primerdominio a second Ethernet AIS frame for transmission to a second node MEP arranged in an OAM segundodominio higher hierarchical level, said second Ethernet AIS frame indication of nivelque it indicates that failure detected in said first OAM domain lower hierarchical level; determining unfallo in said second domain OAM hierarchy level on Ethernet (100) network via dichosegundo node MEP and in response to said second Ethernet AIS frame including an indication of queindica level has detected a fault in said first OAM domain lower hierarchical level, suppress generacionen said second OAM domain through said second node MEP jerarquicosuperior arranged on the second level, an alarm due to a given fault in said second OAM domain hierarchy level.