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1、组播-断言机制当没有接收者时，R2和R4都会被pruneR1#ping224.1.1.1repeat100Typeescapesequencetoabort.Sending100,100-byteICMPEchosto224.1.1.1,timeoutis2seconds:....................................................................................................R5#debugipmpacketIPmulticastpacketsde
2、buggingisonR5#debugippim224.1.1.1PIMdebuggingisonR5#*Mar2509:25:06.787:IP(0):s=192.168.15.1(Serial1/0)d=224.1.1.1(Serial1/1)把组播流量从S1/1口发出id=0,ttl=254,prot=1,len=100(100),mforward*Mar2509:25:06.795:IP(0):s=192.168.15.1(Serial1/0)d=224.1.1.1(Serial1/3)把组播流量从S1/3口发出id=0,ttl=25
3、4,prot=1,len=100(100),mforward*Mar2509:25:06.895:PIM(0):Receivedv2Join/PruneonSerial1/1from192.168.52.2,tous*Mar2509:25:06.895:PIM(0):Prune-list:(192.168.15.1/32,224.1.1.1)*Mar2509:25:06.895:PIM(0):PruneSerial1/1/224.1.1.1from(192.168.15.1/32,224.1.1.1)R5#从R2收到prune消息*Mar25
4、09:25:11.267:PIM(0):Receivedv2Join/PruneonSerial1/3from192.168.54.4,tous*Mar2509:25:11.271:PIM(0):Prune-list:(192.168.15.1/32,224.1.1.1)*Mar2509:25:11.275:PIM(0):PruneSerial1/3/224.1.1.1from(192.168.15.1/32,224.1.1.1)从R4收到prune消息R5#*Mar2509:28:08.803:IP(0):s=192.168.15.1(Se
5、rial1/0)d=224.1.1.1(Serial1/1)id=91,ttl=254,prot=1,len=100(100),mforward*Mar2509:28:08.807:IP(0):s=192.168.15.1(Serial1/0)d=224.1.1.1(Serial1/3)id=91,ttl=254,prot=1,len=100(100),mforward3秒钟后再次转发流量*Mar2509:28:08.915:PIM(0):Receivedv2Join/PruneonSerial1/1from192.168.52.2,tous
6、*Mar2509:28:08.919:PIM(0):Prune-list:(192.168.15.1/32,224.1.1.1)*Mar2509:28:08.919:PIM(0):PruneSerial1/1/224.1.1.1from(192.168.15.1/32,224.1.1.1)这次收到了来自R2的prune消息，因为R2选举失败R2#debugippim224.1.1.1PIMdebuggingisonR2#debugipmpacketIPmulticastpacketsdebuggingisonR2#*Mar2509:25:06
7、.079:IP(0):s=192.168.15.1(Serial1/2)d=224.1.1.1(FastEthernet0/0)从F0/0把流量转发出去id=0,ttl=253,prot=1,len=100(100),mforward*Mar2509:25:06.111:PIM(0):Sendv2AssertonFastEthernet0/0for224.1.1.1,source192.168.15.1,metric[120/1]并发送一个v2的Assert报文到224.1.1.1，其中含有AD和metric*Mar2509:25:06.11
8、1:PIM(0):Assertmetrictosource192.168.15.1is[120/1]*Mar2509:25:06.111:PIM(0):Wewin,
