//调试ospf事件,显示发送，接受hello包，邻居改变事件，DR选取，如何建立邻接关系。

带认证的会多一条

*Mar  1 04:43:39.382: OSPF: Send with youngest Key 1

*Mar  1 04:43:39.382: OSPF: Send hello to 224.0.0.5 area 0 on FastEthernet0/0 from 12.1.1.1

R1#

*Mar  1 04:43:41.986: OSPF: Rcv pkt from 12.1.1.2, FastEthernet0/0 : Mismatch Authentication Key - No message digest key 0 on interface



如下，不带认证的debug信息

R1#debug ip ospf events 

OSPF events debugging is on

R1#正常状况，每隔10s发送hello包，并接受邻居的hello包

*Mar  1 02:28:12.911: OSPF: Send hello to 224.0.0.5 area 0 on FastEthernet1/0 from 10.1.1.1

R1#

*Mar  1 02:28:15.919: OSPF: Rcv hello from 22.2.2.2 area 0 from FastEthernet0/0 12.1.1.2

*Mar  1 02:28:15.923: OSPF: End of hello processing

R1#

*Mar  1 02:28:19.159: OSPF: Send hello to 224.0.0.5 area 0 on FastEthernet0/0 from 12.1.1.1

R1#

*Mar  1 02:28:22.915: OSPF: Send hello to 224.0.0.5 area 0 on FastEthernet1/0 from 10.1.1.1

R1#

*Mar  1 02:28:25.947: OSPF: Rcv hello from 22.2.2.2 area 0 from FastEthernet0/0 12.1.1.2

*Mar  1 02:28:25.951: OSPF: End of hello processing

R1#

*Mar  1 02:28:29.159: OSPF: Send hello to 224.0.0.5 area 0 on FastEthernet0/0 from 12.1.1.1

R1#

*Mar  1 02:28:32.919: OSPF: Send hello to 224.0.0.5 area 0 on FastEthernet1/0 from 10.1.1.1

R1#

*Mar  1 02:28:39.159: OSPF: Send hello to 224.0.0.5 area 0 on FastEthernet0/0 from 12.1.1.1

R1#

*Mar  1 02:28:42.919: OSPF: Send hello to 224.0.0.5 area 0 on FastEthernet1/0 from 10.1.1.1

R1#

*Mar  1 02:28:49.163: OSPF: Send hello to 224.0.0.5 area 0 on FastEthernet0/0 from 12.1.1.1

R1#

*Mar  1 02:28:52.923: OSPF: Send hello to 224.0.0.5 area 0 on FastEthernet1/0 from 10.1.1.1

R1#

*Mar  1 02:28:59.163: OSPF: Send hello to 224.0.0.5 area 0 on FastEthernet0/0 from 12.1.1.1

R1#

*Mar  1 02:29:02.927: OSPF: Send hello to 224.0.0.5 area 0 on FastEthernet1/0 from 10.1.1.1

R1#//在R2上shutdown 与R1的接口，邻接关系断掉，重新选取DR，建立路由器LSA,显示无邻居可以建立。。。

*Mar  1 02:29:05.951: OSPF: 22.2.2.2 address 12.1.1.2 on FastEthernet0/0 is dead

*Mar  1 02:29:05.951: OSPF: 22.2.2.2 address 12.1.1.2 on FastEthernet0/0 is dead, state DOWN

*Mar  1 02:29:05.955: %OSPF-5-ADJCHG: Process 1, Nbr 22.2.2.2 on FastEthernet0/0 from FULL to DOWN, Neighbor Down: Dead timer expired

R1#

*Mar  1 02:29:05.959: OSPF: Neighbor change Event on interface FastEthernet0/0

*Mar  1 02:29:05.963: OSPF: DR/BDR election on FastEthernet0/0 

*Mar  1 02:29:05.963: OSPF: Elect BDR 0.0.0.0

*Mar  1 02:29:05.967: OSPF: Elect DR 1.1.1.1

*Mar  1 02:29:05.967:        DR: 1.1.1.1 (Id)   BDR: none 

*Mar  1 02:29:06.459: OSPF: Build router LSA for area 0, router ID 1.1.1.1, seq 0x80000015

*Mar  1 02:29:06.463: OSPF: No full nbrs to build Net Lsa for interface FastEthernet0/0

*Mar  1 02:29:06.463: OSPF: Build network LSA for FastEthernet0/0, router ID 1.1.1.1

*Mar  1 02:29:06.467: OSPF: Build network LSA for FastEth