IP Multicast technology based on MPLS Domain is a hot topic in Internet research. Merging MPLS and multicast tech- nologies can acquire two advantages:Multicast saving bandwidth and MPLS supporting high- speed, QoS and traffic engineering, VPN.

• 基于MPLS的IP组播是目前网络研究的热点问题之一,MPLS和IP组播技术的结合可以获得MPLS的高速率、QoS、流量工程、VPN和IP组播的带宽节省两方面的益处,MPLS和组播是两种互补的技术。