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随着视频点播、视频会议、远程教育等多播应用的普及,多播分组在路由器中的转发已不能满足日益增长的带宽需求,第三层交换机能以线速处理数据包,能极大地减轻路由器的负载,提高分组的转发速度。对IP多播分组的转发技术进行了讨论,着重探讨了在第三层交换机中的快速转发、转发存在的问题以及目前的三种解决方案。
With the popularization of multicast applications such as video on demand, video conferencing and distance education, the multicast packet forwarding in the router can not meet the increasing demand for bandwidth. Layer 3 switches can process data packets at wire speed and greatly reduce Router load, improve packet forwarding speed. This paper discusses the forwarding technology of IP multicast packet, and focuses on the fast forwarding and forwarding problems in Layer 3 switch and the three solutions.