Maintenance Associations; Maintenance Points - Cisco WS-C6506 Software Manual

Catalyst 6500 series switch

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Configuring Metro Ethernet Connectivity Fault Management

Often, three different organizations are involved in a Metro Ethernet service: customers, service

providers, and operators. Customers purchase the Ethernet service from service providers. Service

providers may use their own networks or the networks of other operators to provide connectivity for the

requested service. Customers themselves may be service providers. For example, a customer may be an

Internet service provider that sells Internet connectivity.

Nested maintenance domains allow the service provider to contract with one or more operators to

provide the Ethernet service to a customer. In a nested domain, each operator has its own maintenance

domain, the service provider defines its own domain that is a superset of the operators' domains, and the

customer has its own end-to-end domain, which is a superset of the service provider's domain. In this

scenario, the involved administering organizations communicate between the maintenance levels of the

various nesting domains. For example, the service provider would assign the maintenance levels to the

Maintenance Associations

A maintenance association identifies a service that can be uniquely identified within a maintenance

domain. The CFM protocol runs within a particular maintenance association. An MA is a set of

Maintenance End Points (MEPs), each configured with the same Maintenance Association ID (MAID)

and a maintenance domain level established to verify the integrity of a single service instance. Multiple

maintenance associations can exist within each maintenance domain.

Any port of a bridge is referred to as a maintenance point. A maintenance point may be classified as a

maintenance endpoint, maintenance intermediate point, or transparent point for a maintenance level.

Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7

Ethernet CFM Maintenance Domain

Exterior ports

Interior ports

shows the maintenance point classifications.

Checking Status and Connectivity

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