Point-to-multipoint and multipoint-to-multipoint services on pbb-te system

We have implemented point-to-multipoint (PtMP) and multipoint-to-multipoint (MPtMP) services on a packet transport system (PTS) based on PBB-TE. The point-to-multipoint (PtMP) connection in the PBB-TE system has been realized by grouping point-to-point (PtP) packet transport layer (PTL) trunks and mapping a BSI onto the PtP PTL trunks using a multicast backbone destination address. For providing different capabilities for service selection and priority selection, the PTS offers customers three basic types of the port-based, C-tagged, and S-tagged service interfaces defined by the IEEE 802.1ah. To offer customers different capabilities of the layer 3 applications and services, moreover, an IP-flow service interface have been added. In order to evaluate traffic performance for PtMP services in the PTS, the PtMP throughputs for the link capacity of 1 Gbps at the four service interfaces were measured in the leaves of the ingress edge node, the transit node, and the egress edge node. The throughputs were about 96% because the B-MAC overhead of 22 bytes occupies 4 % of the 512-byte packet.