IEEE 802.1ag

Internet protocol suite
Application layer
Transport layer
Internet layer
Link layer

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:

  • Defines maintenance domains, their constituent maintenance points, and the managed objects required to create and administer them
  • Defines the relationship between maintenance domains and the services offered by VLAN-aware bridges and provider bridges
  • Describes the protocols and procedures used by maintenance points to maintain and diagnose connectivity faults within a maintenance domain;
  • Provides means for future expansion of the capabilities of maintenance points and their protocols
  1. ^ Status of IEEE 802 Standards
  2. ^ "Ethernet Service OAM- Relevant Standards". Archived from the original on 2009-06-18. Retrieved 2009-06-22.