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存在一哥协调器和二十多个路由器的时候，通过抓包，可以看到路由器经常发出一些广播包，这些广播包具体是什么意义。如图和附件所示
这个广播的数据叫做link status，用于路由设备之间的邻居状态的维护，协调器也会发
