R3:
r3#debug ip ospf adj
OSPF adjacency events debugging is on
r3#
00:29:35: OSPF: Rcv DBD from 1.1.1.1 on Ethernet0/1 seq 0x2098 opt 0x42 flag 0x7 len 32 mtu 1500 state INIT
00:29:35: OSPF: 2 Way Communication to 1.1.1.1 on Ethernet0/1, state 2WAY
00:29:35: OSPF: Neighbor change Event on interface Ethernet0/1
00:29:35: OSPF: DR/BDR election on Ethernet0/1
00:29:35: OSPF: Elect BDR 2.2.2.2
00:29:35: OSPF: Elect DR 3.3.3.3
00:29:35: DR: 3.3.3.3 (Id) BDR: 2.2.2.2 (Id)
00:29:35: OSPF: Send DBD to 1.1.1.1 on Ethernet0/1 seq 0x198D opt 0x42 flag 0x7 len 32
00:29:35: OSPF: First DBD and we are not SLAVE
00:29:35: OSPF: Rcv DBD from 1.1.1.1 on Ethernet0/1 seq 0x198D opt 0x42 flag 0x2 len 112 mtu 1500 state EXSTART
00:29:35: OSPF: NBR Negotiation Done. We are the MASTER
00:29:35: OSPF: Send DBD to 1.1.1.1 on Ethernet0/1 seq 0x198E opt 0x42 flag 0x3 len 92
00:29:35: OSPF: Database request to 1.1.1.1
00:29:35: OSPF: sent LS REQ packet to 10.11.11.11, length 12
00:29:35: OSPF: Rcv DBD from 1.1.1.1 on Ethernet0/1 seq 0x198E opt 0x42 flag 0x0 len 32 mtu 1500 state EXCHANGE
00:29:35: OSPF: Send DBD to 1.1.1.1 on Ethernet0/1 seq 0x198F opt 0x42 flag 0x1 len 32
00:29:35: OSPF: Rcv DBD from 1.1.1.1 on Ethernet0/1 seq 0x198F opt 0x42 flag 0x0 len 32 mtu 1500 state EXCHANGE
00:29:35: OSPF: Exchange Done with 1.1.1.1 on Ethernet0/1
00:29:35: OSPF: Synchronized with 1.1.1.1 on Ethernet0/1, state FULL
00:29:35: %OSPF-5-ADJCHG: Process 1, Nbr 1.1.1.1 on Ethernet0/1 from LOADING to FULL, Loading Done
00:29:35: OSPF: Build network LSA for Ethernet0/1, router ID 3.3.3.3
00:29:36: OSPF: Neighbor change Event on interface Ethernet0/1
00:29:36: OSPF: DR/BDR election on Ethernet0/1
00:29:36: OSPF: Elect BDR 2.2.2.2
00:29:36: OSPF: Elect DR 3.3.3.3
00:29:36: DR: 3.3.3.3 (Id) BDR: 2.2.2.2 (Id)
最后启动R4,此时R4应该只与R2 R3交换LSA构成FULL ,与R1建立普通2WAY
r2#
00:35:03: OSPF: 2 Way Communication to 4.4.4.4 on Ethernet0/1, state 2WAY
00:35:03: OSPF: Neighbor change Event on interface Ethernet0/1
00:35:03: OSPF: DR/BDR election on Ethernet0/1
00:35:03: OSPF: Elect BDR 2.2.2.2
00:35:03: OSPF: Elect DR 3.3.3.3
00:35:03: DR: 3.3.3.3 (Id) BDR: 2.2.2.2 (Id)
00:35:03: OSPF: Send DBD to 4.4.4.4 on Ethernet0/1 seq 0x2178 opt 0x42 flag 0x7 len 32
00:35:06: OSPF: Rcv DBD from 4.4.4.4 on Ethernet0/1 seq 0x1852 opt 0x42 flag 0x7 len 32 mtu 1500 state EXSTART
00:35:06: OSPF: NBR Negotiation Done. We are the SLAVE
00:35:06: OSPF: Send DBD to 4.4.4.4 on Ethernet0/1 seq 0x1852 opt 0x42 flag 0x2 len 112
00:35:06: OSPF: Rcv DBD from 4.4.4.4 on Ethernet0/1 seq 0x1853 opt 0x42 flag 0x3 len 52 mtu 1500 state EXCHANGE
00:35:06: OSPF: Send DBD to 4.4.4.4 on Ethernet0/1 seq 0x1853 opt 0x42 flag 0x0 len 32
00:35:06: OSPF: Database request to 4.4.4.4
00:35:06: OSPF: sent LS REQ packet to 10.4.4.4, length 12
00:35:06: OSPF: Rcv DBD from 4.4.4.4 on Ethernet0/1 seq 0x1854 opt 0x42 flag 0x1 len 32 mtu 1500 state EXCHANGE
00:35:06: OSPF: Exchange Done with 4.4.4.4 on Ethernet0/1
00:35:06: OSPF: Send DBD to 4.4.4.4 on Ethernet0/1 seq 0x1854 opt 0x42 flag 0x0 len 32
00:35:06: OSPF: Synchronized with 4.4.4.4 on Ethernet0/1, state FULL
00:35:06: %OSPF-5-ADJCHG: Process 1, Nbr 4.4.4.4 on Ethernet0/1 from LOADING to FULL, Loading Done
00:39:53: OSPF: Build router LSA for area 0, router ID 2.2.2.2, seq 0x80000003
R3:
r3#
00:35:00: OSPF: 2 Way Communication to 4.4.4.4 on Ethernet0/1, state 2WAY
00:35:00: OSPF: Neighbor change Event on interface Ethernet0/1
00:35:00: OSPF: DR/BDR election on Ethernet0/1
00:35:00: OSPF: Elect BDR 2.2.2.2
00:35:00: OSPF: Elect DR 3.3.3.3
00:35:00: DR: 3.3.3.3 (Id) BDR: 2.2.2.2 (Id)
00:35:00: OSPF: Send DBD to 4.4.4.4 on Ethernet0/1 seq 0x14D7 opt 0x42 flag 0x7 len 32
00:35:04: OSPF: Rcv DBD from 4.4.4.4 on Ethernet0/1 seq 0x195F opt 0x42 flag 0x7 len 32 mtu 1500 state EXSTART
00:35:04: OSPF: NBR Negotiation Done. We are the SLAVE
00:35:04: OSPF: Send DBD to 4.4.4.4 on Ethernet0/1 seq 0x195F opt 0x42 flag 0x2 len 112
00:35:04: OSPF: Rcv DBD from 4.4.4.4 on Ethernet0/1 seq 0x1960 opt 0x42 flag 0x3 len 52 mtu 1500 state EXCHANGE
00:35:04: OSPF: Send DBD to 4.4.4.4 on Ethernet0/1 seq 0x1960 opt 0x42 flag 0x0 len 32
00:35:04: OSPF: Database request to 4.4.4.4
00:35:04: OSPF: sent LS REQ packet to 10.4.4.4, length 12
00:35:04: OSPF: Rcv DBD from 4.4.4.4 on Ethernet0/1 seq 0x1961 opt 0x42 flag 0x1 len 32 mtu 1500 state EXCHANGE
00:35:04: OSPF: Exchange Done with 4.4.4.4 on Ethernet0/1
00:35:04: OSPF: Send DBD to 4.4.4.4 on Ethernet0/1 seq 0x1961 opt 0x42 flag 0x0 len 32
00:35:04: OSPF: Synchronized with 4.4.4.4 on Ethernet0/1, state FULL
00:35:04: %OSPF-5-ADJCHG: Process 1, Nbr 4.4.4.4 on Ethernet0/1 from LOADING to FULL, Loading Done
00:35:04: OSPF: Build network LSA for Ethernet0/1, router ID 3.3.3.3
00:38:50: OSPF: Build router LSA for area 0, router ID 3.3.3.3, seq 0x80000003
R1:
r1#
00:34:25: OSPF: 2 Way Communication to 4.4.4.4 on Ethernet0/1, state 2WAY
00:34:25: OSPF: Neighbor change Event on interface Ethernet0/1
00:34:25: OSPF: DR/BDR election on Ethernet0/1
00:34:25: OSPF: Elect BDR 2.2.2.2
00:34:25: OSPF: Elect DR 3.3.3.3
00:34:25: DR: 3.3.3.3 (Id) BDR: 2.2.2.2 (Id)
此时R4上的邻居表:
r4#sh ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
2.2.2.2 1 FULL/BDR 00:00:37 10.2.2.2 Ethernet0/1
1.1.1.1 1 2WAY/DROTHER 00:00:35 10.11.11.11 Ethernet0/1
3.3.3.3 1 FULL/DR 00:00:33 10.3.3.3 Ethernet0/1
r1#sh ip ospf neighbor detail
Neighbor 4.4.4.4, interface address 10.4.4.4
In the area 0 via interface Ethernet0/1
Neighbor priority is 1, State is 2WAY, 2 state changes
DR is 10.3.3.3 BDR is 10.2.2.2
Options is 0x2
Dead timer due in 00:00:39
Neighbor is up for 00:17:00
Index 0/0, retransmission queue length 0, number of retransmission 0
First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0)
Last retransmission scan length is 0, maximum is 0
Last retransmission scan time is 0 msec, maximum is 0 msec
Neighbor 3.3.3.3, interface address 10.3.3.3
In the area 0 via interface Ethernet0/1
Neighbor priority is 1, State is FULL, 6 state changes
DR is 10.3.3.3 BDR is 10.2.2.2
Options is 0x42
Dead timer due in 00:00:33
Neighbor is up for 00:22:26
Index 2/2, retransmission queue length 0, number of retransmission 0
First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0)
Last retransmission scan length is 0, maximum is 0
Last retransmission scan time is 0 msec, maximum is 0 msec
Neighbor 2.2.2.2, interface address 10.2.2.2
In the area 0 via interface Ethernet0/1
Neighbor priority is 1, State is FULL, 6 state changes
DR is 10.3.3.3 BDR is 10.2.2.2
Options is 0x42
Dead timer due in 00:00:32
Neighbor is up for 00:22:37
Index 1/1, retransmission queue length 0, number of retransmission 1
First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0)
Last retransmission scan length is 1, maximum is 1
Last retransmission scan time is 0 msec, maximum is 0 msec
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