display ospf peer无法查看到邻居,常见问题简易排查。
1、接口是否启动OSPF
2、接口是否配置为静默端口
3、ACL中拒绝了Hello报文
4、广播网中IP地址掩码不一致
RTA:
#
interface GigabitEthernet0/0
ip address 1.1.1.1 255.255.255.252
#
ospf 1
area 0.0.0.0
network 1.1.1.0 0.0.0.3
#
RTB:
#
ospf 1
area 0.0.0.0
network 1.1.1.0 0.0.0.3
#
interface GigabitEthernet0/0
ip address 1.1.1.2 255.255.255.0
#
[RTB]dis ospf statistics error
OSPF Process 1 with Router ID 1.1.1.2
OSPF Packet Error Statistics
0 : Router ID confusion 0 : Bad packet
0 : Bad version 0 : Bad checksum
0 : Bad area ID 0 : Drop on unnumbered link
0 : Bad virtual link 0 : Bad authentication type
0 : Bad authentication key 0 : Packet too small
0 : Neighbor state low 0 : Transmit error
0 : Interface down 0 : Unknown neighbor
24 : HELLO: Netmask mismatch 0 : HELLO: Hello-time mismatch
0 : HELLO: Dead-time mismatch 0 : HELLO: Ebit option mismatch
……
5、两端OSPF计时器设定值是否匹配
OSPF
Hello
[RTA]dis ospf statistics error
OSPF Process 1 with Router ID 1.1.1.1
OSPF Packet Error Statistics
0 : Router ID confusion 0 : Bad packet
0 : Bad version 0 : Bad checksum
0 : Bad area ID 0 : Drop on unnumbered link
0 : Bad virtual link 0 : Bad authentication type
0 : Bad authentication key 0 : Packet too small
0 : Neighbor state low 0 : Transmit error
1 : Interface down 0 : Unknown neighbor
0 : HELLO: Netmask mismatch 8 : HELLO: Hello-time mismatch
……
6、OSPF验证配置是否匹配
7、OSPF区域配置是否匹配
8、OSPF邻居是否使用从地址建立
9、NBMA、P2MP单播网络是否指定邻居
10、两端网络类型不一致
OSPF
4
11、运营商传输链路禁止组播报文通过
12、邻居Router ID冲突
<RTA>DIS OSPF statistics error
OSPF Process 1 with Router ID 19.1.1.1
OSPF Packet Error Statistics
7 : Router ID confusion 0 : Bad packet
0 : Bad version 0 : Bad checksum
0 : Bad area ID 0 : Drop on unnumbered link
……
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