Maintenance Domain

A Maintenance Domain (MD) is the network or the part of the network for which faults in connectivity are managed. A domain is owned and operated by a single entity and defined by a set of ports internal to it and at its boundary.

Maintenance Domain in ECFM

A Maintenance Domain is fully connected internally; that is, an MEP associated with an MD has connectivity to every other MEP in the MD, in the absence of faults. The purpose of CFM is to monitor and diagnose the ability of a maintenance domain to meet its operators’ intentions for connectivity.

Each Maintenance Domain is assigned a unique Maintenance Domain Name and Domain Level to facilitate the easy identification of administrative responsibility for the Maintenance Domain.

Domains must not intersect, because intersecting indicates the management by more than one entity, which is not permitted.