怎么选择DR、BDR?
1、使用HELLO报文来互相交换信息,从而选择出DR、BDR。
2、优先级最高者则成为DR,次高者成为BDR。
3、当优先级相同时,router ID最高者为DR,次高者为BDR。
During a recent OSPF election among three routers, RTA was elected the DR and RTB was elected the BDR, as seen in the graphic. Assume that RTA fails, and that RTB takes the place of
the DR whi le RTC becomes the new BDR. What will happen when RTA comes back online?()
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