Two-story Semi-switch Igmp Snooping Functions

Owing to multimedia applications of video frequency conference,push-deliver technology,cosmically concurrent compute,network proxy and high-speed buffer station.So IP multicast technology develops.In this paper,the design and implementation of Switch two-layer multicast IGMP Snooping ,is discussed.Firstly,ip multicast technology is introduced in this paper.Several versions of IGMP are introduced in this paper,Presently IGMP version 2 has become the leading standard. The Coretek Company's DeltaOS/Lambda-gcc are used in the switch system.The constitute and function of the board are analyzed.And then the actual switch system is described in this paper.Its designing thoughts and IGMP Snooping implementations such as IGMP Snooping initialization.Its test results are described ,which IGMP Snooping function test,command line test, integration test of IGMP Snooping and interior/exterior module.At last,the next job is put forward.