文稿说明成果debug ospf packet dd

R1:debugospfpacket R1RM/7/RMDEBUG:OSPF1:SEND R1 SourceAddress: R1 DestinationAddress: R1 Ver#2,Type:2(DB R1 Length:32,Router: R1 Area:0.0.0.0,Chksum: R1 AuType: R1 Key(ascii):0000000 R1 MTU:1560,Option: R1 R1 DDSeqNumber: R1 #LSAHeaders: R1 DDExtended 发送初始化DD报文(只有DD报文头)自己是Mater并告诉R2一个DD序列号 R1RM/7/RMDEBUG:OSPF1:RECVR1SourceAddress:R1DestinationAddress:R1Ver#2,Type:2(DBR1Length:32,Router:R1Area:0.0.0.0,Chksum:R1AuType:R1Key(ascii):0000000R1MTU:1400,Option:R1 R1DDSeqNumber:R1#LSAHeaders:R1DDExtended 收到了R2发送的初始化DD报文R2也自己为Mater，DD序列号为790，同时R1发现了R2拥有更高的RouterID,所以R1将接收R2作为Master并没有对R2发送的MTU进行检测.同时将R2的邻 R1RM/7/RMDEBUG:OSPF1:SEND R1 SourceAddress: R1 DestinationAddress: R1 Ver#2,Type:2(DB R1 Length:132,Router: R1 Area:0.0.0.0,Chksum: R1 AuType: R1 Key(ascii):0000000 R1 MTU:1560,Option: R1 R1 DDSeqNumber: R1 #LSAHeaders: R1 LSAType R1 LSID: R1 AdvRtr: R1 LSAAge: R1 Options: R1 Length:36, R1 CheckSum:R1LSATypeR1LSID:R1AdvRtr:R1LSAAge:R1Options:R1Length:36, R1CheckSum:R1LSATypeR1LSID:R1AdvRtr:R1LSAAge:R1Options:R1Length:48,R1CheckSum:R1LSATypeR1LSID:R1AdvRtr:R1LSAAge:R1Options:R1Length:36,R1CheckSum:R1LSATypeR1LSID:R1AdvRtr:R1LSAAge:R1Options:R1Length:32,R1CheckSum:R1DDExtended接受R2作为Master(R2拥有更高的RouterID)采用R2的序列号发 R1RM/7/RMDEBUG:OSPF1:RECV R1 SourceAddress: R1 DestinationAddress: R1 Ver#2,Type:2(DB R1 Length:32,Router: R1 Area:0.0.0.0,Chksum: R1 AuType: R1 Key(ascii):0000000 R1 MTU:1400,Option: R1 R1 DDSeqNumber: R1 #LSAHeaders: R1 DDExtended R2debugospfpacket R2RM/7/RMDEBUG:OSPF1:RECV R2 SourceAddress: R2 DestinationAddress: R2 Ver#2,Type:2(DB R2 Length:32,Router:R2R2Area:0.0.0.0,Chksum:AuType:R2Key(ascii):0000000R2MTU:1560,Option:R2 R2DDSeqNumber:R2#LSAHeaders:R2DDExtended R2 R2RM/7/RMDEBUG:OSPF1:SEND R2 SourceAddress: R2 DestinationAddress: R2 Ver#2,Type:2(DB R2 Length:32,Router: R2 Area:0.0.0.0,Chksum: R2 AuType: R2 Key(ascii):0000000 R2 MTU:1400,Option: R2 R2 DDSeqNumber: R2 #LSAHeaders: R2 DDExtended R2 R2RM/7/RMDEBUG:OSPF1:RECVR2SourceAddress:R2DestinationAddress:R2Ver#2,Type:2(DBR2Length:132,Router:R2Area:0.0.0.0,Chksum:R2AuType:R2Key(ascii):0000000R2MTU:1560,Option:R2 R2DDSeqNumber:R2#LSAHeaders:R2LSATypeR2LSID:R2AdvRtr:R2LSAAge:R2Options:R2Length:36, R2CheckSum:R2LSATypeR2LSID:R2AdvRtr:R2LSAAge:R2Options:R2Length:36, R2CheckSum:R2LSATypeR2LSID:R2AdvRtr:R2LSAAge:R2Options:R2Length:48,R2CheckSum:R2LSATypeR2LSID:R2AdvRtr:R2LSAAge:R2Options:R2Length:36,R2CheckSum:R2LSATypeR2LSID:R2AdvRtr:R2LSAAge:R2Options:R2Length:32,R2CheckSum:R2DDExtended R2R2作为Master,此时R2会对R1发送的interfaceMTU（1560）进行检测发现与自己的MTU（1400）不一致.R2会忽略此DD报文 R2RM/7/RMDEBUG:OSPF1:SEND R2 SourceAddress: R2 DestinationAddress: R2 Ver#2,Type:2(DBR