The multicast tree switching method and the device realize optimum forwarding path for multicast tree switching.
应用本发明提供的方法和装置使组播树切换时转发路径最优。
With multicast tree aggregation, fewer trees are maintained which amounts to reduce both the number of forwarding states in routers and the overhead induced by control messages.
组播组的聚合使得网络中组播树的数量减少，路由器需要维持的组播转发状态和传递控制信息带来的控制开销都大大降低。
Since multicast may have many receivers, for effective transmission, the router needs a tree to join multiple IP members, with Multicast RIP and its data packet forwarding function.
多点广播的接收方可能很多，为了有效地进行传输，路由器要构造一个连接IP多点广播组所有成员的树，采用多点广播路由选择协议并启用多点广播数据包转发功能。
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