Sample Ethernet CFM implementation

MDs, MEPs, and MIPs in an IEEE 802.1ag network

Figure 91-1, Ethernet CFM objects in example network shows an example of MDs, MEPs, and MIPs in an IEEE 802.1ag network that consists of two operator areas, for example, services in the provider network, that are joined to create a network path for customer traffic.

The number on an object identifies the associated MD, which is one of the following:

• MD 5—end-to-end customer path

• MD 3—end-to-end network provider path

• MD 2—paths within services

• MD 0—physical path

MD 5 provides access to a down MEP on each CE device, and to a MIP on each PE bridge. MD 3 provides access to an up MEP on each PE bridge, and to a MIP on each bridge between groups of operator bridges. MD 2 provides access to the up MEPs and MIPs in each service. MD 0 provides access to MEPs for checking the physical connectivity between NEs.

Figure 91-1: Ethernet CFM objects in example network