EtherHaul Operation, Administration and Maintenance Manual
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OAM capabilities independently, with the customer at the highest level, the provider in
the middle, and the operator at the lowest level.
CFM is designed to be transparent to the customer data transported by the network and
to provide maximum fault coverage. These capabilities are used in networks operated
by multiple independent organizations, each with restricted management access to each
other’s equipment.
CFM entities support an individual service instance as Maintenance Association End
Points (MEPs) are configured to create a Maintenance Association (MA). The MA
monitors connectivity provided by that instance through the Maintenance Domain.
Maintenance Association Intermediate Points (MIPs) are the intermediate points in a
specific MA or MD.
The major features of CFM are fault detection, path discovery, fault verification, fault
isolation, and fault recovery.
The system allows to:
Define Maintenance Domain (MD)
Define Maintenance Association (MA)
Define Maintenance Association End Points (MEPs) and Maintenance
Association Intermediate Points (MIPs)
UP MEP – transmit CFM PDUs into the bridge
Down MEP – transmit CFM PDUs out of the bridge
Figure 13-1 CFM Network
