Ma, Mep, Mip And Md Levels; Figure 23: Mep And Mip - Alcatel-Lucent 7750 SR Manual

Ethernet Connectivity Fault Management (ETH-CFM)

MA, MEP, MIP and MD Levels

Maintenance domain (MD) levels are used to define CFM maintenance domains, maintenance
association end points (MEPs) and maintenance domain intermediate points (MIPs)only
communicate within the same level. It is carried in the CFM PDU to inform management entities
where maintenance association (MA) the CFM PDU belongs. There are 8 levels defined. 0 is the
lowest level, 7 is the highest level. The levels are nested, not overlapping. Overlapping is not
allowed.
CFM levels include:
•
•
•
Maintenance association (MA) includes a set of MEPs, each configured with the same MA-ID and
MD level, verify the integrity of a single service instance.
MEPs and MIPs in a CFM-enabled network. Two MAs are displayed.
MEP1
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MEP is an actively managed functional component, which implements CFM
functionalities.
Maintenance association Intermediate Point (MIP) is the intermediate point between
MEPs.
MEP and MIP perform different CFM functionalities.
MIP1 MIP2 MIP3
MEP2 MIP12

Figure 23: MEP and MIP

MIP10
MIP4 MIP5 MIP6
MIP11
MA
Figure 23 depicts a high-level view of
MEP3
MA
MIP7 MIP8
MEP1
Bridge
Port
MIP
MEP
OSSG179
7750 SR OS Services Guide