Configuring Ethernet OAM Ethernet OAM Overview
OmniSwitch AOS Release 8 Network Configuration Guide December 2017 page 37-4
CFM Maintenance Domain
CFM uses a hierarchical Maintenance Domain (MD) infrastructure to manage and administer Ethernet
networks.
• Each domain is made up of Maintenance Endpoints (MEPs) and Maintenance Intermediate Points
(MIPs).
• The MEPs are configured on edge ports within the domain for each EVC. The MIPs are configured on
relevant ports within the domain itself (interior ports).
• The network administrator selects the relevant points within the network to determine where
maintenance points are needed. The maintenance point configuration defines the MD.
• MDs are assigned an unique level number (between 0 and 7) to help identify and differentiate the MD
within the domain hierarchy. For example, different organizations, such as operators (levels 0, 1, 2),
service providers (levels 3, 4), and customers (levels 5, 6, 7), are involved in a Metro Ethernet Service.
• Each organization can have its own Maintenance Domain, designated by the assigned level number to
specify the scope of management needed for that domain.
The following illustration shows an example of the CFM Maintenance Domain hierarchy:
Customer
Network
Customer
Network
Access Network Access Network
Core Network
Operator
Domain
Customer
Domain
Provider
Domain
Maintenance End Point
Maintenance Intermediate Point
Operator
Domain
Operator
Domain
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