智能数据流包丢弃技术 Intelligent Flow Packet Discard
如果其目的地址不在这个路由表里，路由器就将数据包丢弃。
If the destination address is not in the routing table, the packet is dropped.
其他主机在收到数据包的时候，看到这个数据库的目的地址跟自己不匹配，就会把数据包丢弃掉。
Other leader is in when receiving data to wrap, the purpose address that sees this database does not match with oneself, can discard data bag.
上面的输出说明，内核并没有丢弃任何数据包，这是很好的情况。
The output shows that the kernel dropped no packets, which is a good thing.
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