DATA DRIVEN CONNECTION FAULT MANAGEMENT (DDCFM) IN CFM MAINTENANCE POINTS

摘要

Embodiments herein relate to a maintenance point for providing Data Driven Connection Fault Management, DDCFM, in a communication network, the maintenance point comprising maintenance point multiplex and demultiplex entities enhanced with an Opcode Demultiplex entity that forwards a first copy of Send Frame Message, SFM, data frames towards Passive Multiplexers of the maintenance point and a second copy of the SFM data frames towards a Decapsulator Responder. The Decapsulator Responder is configured to:
receive the SFM data frames from the Opcode Demultiplexer;
discard the SFM data frames having a destination address that does not match the MAC address of the Decapsulator Responder;
decapsulate the SFM data frames having a destination address that matches the MAC address of the Decapsulator Responder;
query a filtering database to identify an egress port for carrying the decapsulated SFM data frames to a destination specified by the decapsulated SFM data frames;
if an egress port for carrying the decapsulated SFM data frames to the specified destination is identified, carry each decapsulated SFM data frame to a related Linktrace Output Multiplexer, LOM, for transmission toward the specified destination; and
if an egress port for carrying the decapsulated SFM data frames to the specified destination is not identified:
determine whether an EnableFlooding bit of an SFM Flags field is set;
if the EnableFlooding bit is not set, discard the SFM data frame; and
if the EnableFlooding bit is set, flood each decapsulated SFM data frame to all forwarding ports in an associated Virtual Local Area Network Identity, VID, set.