针对分布式路由器，设计了组播转发表优化分布式存储及组播报文两级转发方案提高性能。

Aiming at distributed router, we design the optimized distributed storage of multicast forwarding table, and two level forwarding project for multicast datagram.

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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。

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.

youdao

跟上我了？最后一个条目是出接口，因此当我们接收一些这个组播组的流量是，我们将通过这个接口转发它。

Still with me? The final entry is the outgoing interface list, so when we DO receive some traffic for this multicast group, this shows where we will forward it.

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