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1、组播•断言机制当没有接收者时，R2和R4都会被pruneRl#ping224.1.1.1repeat100Typeescapesequencetoabort.Sending100,100-byteICMPEchosto224.1.1.1,timeoutis2seconds:R5#debugipmpacketIPmulticastpacketsdebuggingisonR5#debugippim224.1.1.1PIMdebuggingisonR5#*Mar2509:25:06.787:IP(0):s=192.168.
2、15.1(Seriall/0)d=224.1.1.1(Seriall/1)id=0,ttl=254,prot=l,len=100(100),mforward*Mar2509:25:06.795:IP(0):s=192.168.15.1(Seriall/0)d=224.1.1.1(Seriall/3)id=0,ttl=254,prot=l,len=100(100),mforward*Mar2509:25:06.895:PIM(0):Receivedv2Join/PruneonSeriall/1from192.168.5
3、2.2,tous*Mar2509:25:06.895:PIM(0):Prune-list:(192.168.15.1/32,224.1.1.1)*Mar2509:25:06.895:PIM(0):PruneSeriall/1/224.1.1.1from(192.168.15.1/32,224.1.1.1)R5#*Mar2509:25:11.267:PIM(0):Receivedv2Join/PruneonSeriall/3from192.168.54.4,tous*Mar2509:25:11.271:PIM(0):P
4、rune-list:(192.168.15.1/32,224.1.1.1)*Mar2509:25:11.275:PIM(0):PruneSeriall/3/224.1.1.1from(192.168.15.1/32,224.1.1.1)R5#*Mar2509:28:08.803:IP(0):s=192.168.15.1(Seriall/0)d=224.1.1.1(Seriall/1)id=91,ttl=254,prot=l,len=100(100),mforward*Mar2509:28:08.807:IP(0):s
5、=192.168.15.1(Seriall/0)d=224.1.1.1(Seriall/3)id=91,ttl=254,prot=l,len=100(100),mforward*Mar2509:28:08.915:PIM(O):Receivedv2Join/PruneonSeriall/1from192.168.52.2,tous*Mar2509:28:08.919:PIM(O):Prune-list:(192.168.15.1/32,224.1.1.1)*Mar2509:28:08.919:PIM(0):Prune
6、Seriall/1/224.1.1.1from(192.168.15.1/32,224.1.1.1)R2#debugippim224.1.1.1PIMdebuggingisonR2#debugipmpacketIPmulticastpacketsdebuggingisonR2#*Mar2509:25:06.079:IP(0):s=192.168.15.1(Seriall/2)d=224.1.1.1(FastEthernetO/O)id=0,ttl=253,prot=l,len=100(100)zmforward*Ma
7、r2509:25:06.111:PIM(0):Sendv2AssertonFastEthernetO/Ofor224.1.1.1,source192.16metric[120/1]*Mar2509:25:06.111:PIM(0):Assertmetrictosource192.168.15.1is[120/1]*Mar2509:25:06.111:PIM(0):Wewin,ourmetric[120/1]*Mar2509:25:0PIM(0):ScheduletopruneFastEthernetO/O*Mar25
8、09:25:06.111:PIM(0):(192.168.15.1/32,224.1.1.1)oifFastEthernetO/OinForwardstate*Mar2509:25:06.111:IP(0):s=192.168.15.1(FastEthernetO/O)d=224.1.1.1id=0,ttl=252,prot=l,len=114
