This MIB module defines the managed objects 
and notifications for Ethernet Connectivity 
Fault Management (CFM).

CFM is an end-to-end per service instance Ethernet layer 
Operations, Administration and Management (OAM) protocol. 

CFM events include: 

- Maintenance End-Point (MEP) coming up: establishing 
  connectivity

- Maintenance End-Point going down: losing connectivity

- Maintenance End-Point unknown: unexpected

- Maintenance End-Point missing: expected but not reachable

- Continuity Check Configuration Error: collision in MEP IDs

- Continuity Check Loop: forwarding loop in network

- Continuity Check Cross-connect: cross-connected 
  forwarding path.

The following acronyms are used in this module:

- MEP: Maintenance End Point

- MEPID: Maintenance End Point Identifier

- CC: Continuity Check

- CCDB: Continuity Check Database

- SVLAN: Service Provider Virtual Local Area Network

- VLAN: Virtual Local Area Network

- CLI: Command Line Interface.

- OAM: Operations Administration and Management.