Edge-Core ECS4810-12M Manuel d'utilisateur télécharger pdf (Page 12)

Key Components of CFM

CFM provides restricted management access to each Service Instance

using a structured conceptual network based on these components:

• Domain Service Access Points (DSAPs) are the primary maintenance points used to monitor

connectivity across a maintenance domain, and are the entry points to the paths which

interconnect the access points allocated to a service instance

• A Maintenance Domain (MD) is a part of the network controlled by a single operator and supports

management access to the domain as well as connectivity testing between DSAPs

• A Maintenance Association (MA) contains the DSAPs for an individual Service Instance

• A Maintenance Level (ML) allows maintenance domains to be nested in a hierarchical fashion,

providing access to the specific network portions required by each operator

• Maintenance End Points (MEPs) which provide full CFM access to Service Instance (i.e., a

specific MA)

• Maintenance Intermediate Points (MIPs) which are passive entities that merely validate received

CFM messages, or respond to link trace and loop back requests

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Edge-Core ECS4810-12M Manuel d'utilisateur Page 12