IEEE 802.1ag

IEEE 802.1ag is an amendment to the IEEE 802.1Q networking standard which introduces Connectivity Fault Management (CFM).

This defines protocols and practices for the operations, administration, and maintenance (OAM) of paths through 802.1 bridges and local area networks (LANs).

The final version was approved by the IEEE in 2007.

[1] IEEE 802.1ag is a subset of the earlier ITU-T Recommendation Y.1731, which additionally addresses performance monitoring.

[2] The standard: The document defines various terms: IEEE 802.1ag Ethernet CFM (Connectivity Fault Management) protocols comprise three protocols that work together to help administrators debug Ethernet networks.