OSPF DEBUG 信息解释

星福星

完全为个人理解仅供参考

r3#clear ip os process 这是一个显示在串通链路上的一个DEBUG信息
Reset ALL OSPF processes? [no]: y
r3#
*Mar  1 04:08:21.250: OSPF: Inte***ce Serial1 going Down
*Mar  1 04:08:21.254: OSPF: 3.3.3.3 address 192.168.0.1 on Serial1 is dead, state DOWN
*Mar  1 04:08:21.258: OSPF: 4.4.4.4 address 192.168.0.2 on Serial1 is dead, state DOWN
*Mar  1 04:08:21.262: %OSPF-5-ADJCHG: Process 11, Nbr 4.4.4.4 on Serial1 from FULL to DOWN, Neighbor Down: Inte***ce down or detached
*Mar  1 04:08:21.306: OSPF: Inte***ce Ethernet0 going Down
*Mar  1 04:08:21.310: OSPF: 3.3.3.3 address 192.168.1.1 on Ethernet0 is dead, state DOWN
*Mar  1 04:08:21.314: OSPF: i_error : Bad inte***ce state change
*Mar  1 04:08:21.514: OSPF: Inte***ce Serial1 going Up
*Mar  1 04:08:21.518: OSPF: Inte***ce Ethernet0 going Up
*Mar  1 04:08:21.766: OSPF: Build router LSA for area 0, router ID 3.3.3.3, seq 0x80000001
*Mar  1 04:08:21.814: OSPF: Build router LSA for area 1, router ID 3.3.3.3, seq 0x80000001
*Mar  1 04:08:26.822: OSPF: 2 Way Communication to 4.4.4.4 on Serial1, state 2WAY（进入双方通信状态）
*Mar  1 04:08:26.826: OSPF: Send DBD to 4.4.4.4 on Serial1 seq 0x57F opt 0x52 flag 0x7 len 32（称自己是MST）
*Mar  1 04:08:27.326: OSPF: Rcv DBD from 4.4.4.4 on Serial1 seq 0x8F0 opt 0x52 flag 0x7 len 32  mtu 1500 state EXSTART（在收到邻居发过来的DD包后，进行选MST或SLAVE并且进入EXSTART状态）
*Mar  1 04:08:27.330: OSPF: NBR Negotiation Done. We are the SLAVE（选举结果是我是SLAVE）
*Mar  1 04:08:27.334: OSPF: Send DBD to 4.4.4.4 on Serial1 seq 0x8F0 opt 0x52 flag 0x2 len 72（发送自己数据库LSA头的摘要并且延用MST 的SEQ号，只有MST才可以更改SEQ号因为这样才可以保证DD 报文可以被正确的接收个人理解相当于对报文的确认吧）
*Mar  1 04:08:28.102: OSPF: Rcv DBD from 4.4.4.4 on Serial1 seq 0x8F1 opt 0x52 flag 0x3 len 72  mtu 1500 state EXCHANGE（在收到邻居发过来LSA头的摘要后进行对比并进入EXCHANGE状态）
*Mar  1 04:08:28.106: OSPF: Send DBD to 4.4.4.4 on Serial1 seq 0x8F1 opt 0x52 flag 0x0 len 32（告之邻居我这边已经交换完了没有了，不过我个人理解是我这边数据库LSA头部的摘要全部发完了）
*Mar  1 04:08:28.110: OSPF: Database request to 4.4.4.4
*Mar  1 04:08:28.114: OSPF: sent LS REQ packet to 192.168.0.2, length 12（发送链路请求包）
*Mar  1 04:08:28.606: OSPF: Rcv DBD from 4.4.4.4 on Serial1 seq 0x8F2 opt 0x52 flag 0x1 len 32  mtu 1500 state EXCHANGE(收到邻居发过来的DD包说我这边也交换完了没有可发的，并且又一次进入EXCHANG状态。注意seq变成了0x8F2可以这样解释：我前面发的是seq 0x8F1包而这次收到的是seq 0x8F2的包这是为什么呢？知道不？好好想想！不要告我说不知道那太对不起我一晚上的心血了！哎！还是让我告诉你吧：这是因为只有MST才可以更改这个值，这是不是无形之中对前面发的那个包进行了一次ACK呢！要好好想想呀！这都是我的个人理解仅供参考)
*Mar  1 04:08:28.610: OSPF: Exchange Done with 4.4.4.4 on Serial1（产生的结果是双方交换全部完成）
*Mar  1 04:08:28.610: OSPF: Send DBD to 4.4.4.4 on Serial1 seq 0x8F2 opt 0x52 flag 0x0 len 32（告之MST我收到你前一个seq 0x8F2的包了，通知Exchange结束）
*Mar  1 04:08:28.918: OSPF: Synchronized with 4.4.4.4 on Serial1, state FULL（数据达到同步了进入FULL状）
*Mar  1 04:08:28.918: %OSPF-5-ADJCHG: Process 11, Nbr 4.4.4.4 on Serial1 from LOADING to FULL, Loading Done
*Mar  1 04:08:29.426: OSPF: Build router LSA for area 0, router ID 3.3.3.3, seq 0x80000002
*Mar  1 04:08:35.018: OSPF: Build router LSA for area 0, router ID 3.3.3.3, seq 0x80000003
*Mar  1 04:09:01.518: OSPF: end of Wait on inte***ce Ethernet0
*Mar  1 04:09:01.522: OSPF: DR/BDR election on Ethernet0
*Mar  1 04:09:01.522: OSPF: Elect BDR 3.3.3.3
*Mar  1 04:09:01.526: OSPF: Elect DR 3.3.3.3
*Mar  1 04:09:01.526: OSPF: Elect BDR 0.0.0.0
*Mar  1 04:09:01.530: OSPF: Elect DR 3.3.3.3
*Mar  1 04:09:01.530:        DR: 3.3.3.3 (Id)   BDR: none
*Mar  1 04:09:02.034: OSPF: No full nbrs to build Net Lsa for inte***ce Ethernet0
r3#以上为DEBUG IP OS AD信息


*Mar  1 08:09:37.985: OSPF: DR/BDR election on Ethernet0
*Mar  1 08:09:37.985: OSPF: Elect BDR 4.4.4.4
*Mar  1 08:09:37.989: OSPF: Elect DR 4.4.4.4
*Mar  1 08:09:37.989: OSPF: Elect BDR 0.0.0.0
*Mar  1 08:09:37.993: OSPF: Elect DR 4.4.4.4
*Mar  1 08:09:37.993:        DR: 4.4.4.4 (Id)   BDR: none
*Mar  1 08:09:37.997: OSPF: Remember old DR 192.168.4.2 (id)
*Mar  1 08:09:38.497: OSPF: No full nbrs to build Net Lsa for inte***ce Ethernet0
*Mar  1 08:09:45.329: %OSPF-4-ERRRCV: Received invalid packet: mismatch area ID, from backbone area must be virtual-link but not found from 192.168.25.5, Ethernet0
*Mar  1 08:09:55.329: %OSPF-4-ERRRCV: Received invalid packet: mismatch area ID, from backbone area must be virtual-link but not found from 192.168.25.5, Ethernet0
*Mar  1 08:10:05.393: %OSPF-4-ERRRCV: Received invalid packet: mismatch area ID, from backbone area must be virtual-link but not found from 192.168.25.5, Ethernet0