名闻子火觉 OSPF的通信过程 RT1 Router uter Down Hello(DR 0.0.0.0,Neighbors Seen =0) Down Hello(DR RT2,Neighbors Seen RT1) Init ExStart DD (Seq x,I 1,M=1,MS 1) DD (Seq y,I 1,M 1,MS 1) ExStart Exchange DD (Seq y,I =0,M=1,MS =0) DD (Seq y+1,I 0,M=1,MS 1) Exchange DD (Seg y+1,I =0,M=1,MS =0) DD (Seq y+n,I =0,M=0,MS 1) Loading DD (Seg y+n,I =0,M=0,MS =0 LS Request Full LS Update Full LS Ack