Point-to-multipoint services on PBB-TE system

We have implemented point-to-multipoint (PtMP) services on a packet transport system (PTS) based on PBB-TE. On the implemented PtMP services, a root sent customer frames to three leaves in the forward direction and then MAC-in-MAC frames of IEEE 802.1ah were duplicated and transmitted to three leaves simultaneously. In the backward direction, one leaf transmitted the customer frames and the only root received the frames. IP flow awareness function was added in the PTS to classify layer 3 applications and services. Service interfaces are used to classify services and forward frames over the backbone network. The PTS offers to customers not only three basic types of the port-based, C-VLAN tagged, and S-VLAN tagged service interfaces defined by the IEEE 802.1ah but also an additional type of IP flow service interface. The throughput for the link capacity of 1 Gbps at the four service interfaces were measured 100% in the leaves of the ingress edge node and the transit node with MAC-in-MAC encapsulation. After removing the MAC-in-MAC encapsulation in the egress edge node, 4% of the traffic dropped. It attributed that the B-MAC overhead of 22 bytes occupies 4% of the 512-byte packet.