LW-IGMPv3协议在XORP平台上的分析与实现

IGMP is currently the dominant protocol for local group management in IP multicast architecture. The latest version IGMPv3 introduces the source filter mechanism which improves the ability of a multicast receiver to express its desires and is useful to support Source-Specific Multicast (SSM). However, this mechanism complicates the operation of multicast routers and causes scaling problem. This paper proposes a simplified version of IGMPv3 named Lightweight Group Management Protocol Version 3(LW-IGMPv3). In order to reduce the complicated router operations, we remove un-used state and modify relevant operations in IGMPv3. Through the experiments, we will verify that LW-IGMPv3 is not only compatible with old versions of IGMP, but also shows great improvements in router performance and scalability.