基于Anycast RP的组播源发现协议在单一PIM域中的研究与实现  

STUDY AND REALIZATION ON APPLYING MULTICAST SOURCE DISCOVERY PROTOCOL TO SINGLE PIM DOMAIN BASED ON ANYCAST RP

作　　者：孟祥迪[1,2] 郭静寰[3] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院研究生院,北京100039 [3]大连海事大学计算机科学与技术学院,辽宁大连116026

出　　处：《计算机应用与软件》2009年第6期216-217,共2页Computer Applications and Software

摘　　要：分析当前大型单一PIM-SM(协议无关组播路由稀疏模式Protocol Independence Multicast Sparse Mode)域组播网络传输机制中存在的缺陷:多个接收者同时访问组播网络中某个组播组时,导致该组播组汇聚点RP(Rendezvous Point)的负载加重,影响整个组播网络的性能。一种新的任意播RP技术,将PIM-SM域间的组播源发现协议MSDP(Multicast Source Discovery Protocol)引入到大型单一PIM域组播网络中,解决网络中RP负载不均衡问题,同时又实现网络中RP"就近原则",减少转发时延。同时,实现RP间的冗余备份,提高网络性能。实际组网测试证明,单一PIM-SM域组播网络中利用任意播RP技术,缩短传输时延2～3倍,RP路由器CPU占用率降低10%。The shortcomings of transmission mode in large single PIM-SM （Protocol Independence Multieast Sparse Mode） network is analyzed ： when several receivers access to a certain multicast group in the multicast network simultaneously the burden of that RP （ Rendezvous Point） will be aggravated and that influences the performance of the whole muhicast network. To the problem mentioned above, a new technique,the anycast RP technique is put forward,which introduces the muhicast source discovery protocol （MSDP） to the large single PIM-SM domain multicast network. This technique can resolve the imbalance of the RP＇ s burden, and then realize the RP＇ s principle of ＂accessing the closest＂ to reduce the transmission latency as well as achieve the redundancy backup of the RP to improve the network performance. It is proved by the test on group network that the technique of the anycast RP used in single PIM-SM domain muhicast network can reduce the transmission latency 2 -3 times than ever,and the occupancy rate of the CPU in the RP router is reduced 10% less.

关 键 词：PIM 汇聚点RP 组播源发现协议MSDP 任意播RP 

分 类 号：TP393.4[自动化与计算机技术—计算机应用技术] TP393.03[自动化与计算机技术—计算机科学与技术]