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.