H-VPLS Redundant Edge Network

In the following figure, PE-C still represents a single point of failure. To remove this exposure, the fault tolerant access points can be combined with the redundant spoke pseudowires to produce a redundant edge configuration, as shown below.

Click to expand in new window
Example Redundant Edge H-VPLS Network
../Graphics/EX_mpls_0023.svg

In the network shown in the above figure, only one of the pseudowires between the MTUs and their attaching PEs is active at any instant in time. This network provides fault tolerance for a failure at either MTU or at either of the attaching PEs, as well as for the active pseudowire in use between the MTUs and PEs.