Satellite links have wide area coverage and are used for international backbone links. The Asian Internet Interconnection Initiatives (AI3) Project is one of the most operational satellite based R & D networks in Southeast Asia. IP multicast is the important technology for the future Internet. Broadcast capability of the satellite link is suitable for the IP multicast application. Uni Directional Link Routing (UDLR) technology is one of the solutions to provide multicast routing for the Uni Directional satellite link. The paper introduces the UDLR technology which can use the UDL satellite link as the Internet infrastructure, it discusses how to provide wide area IP multicast using UDLR technology, and describes an evaluation of the AI3 project. Also, the paper describes an actual application on the AI3 multicast network, such as Web cache distribution and distance learning.