Troubleshooting ospf configuration, No ospf neighbor relationship established, Symptom – H3C Technologies H3C WX6000 Series Access Controllers User Manual
Page 285: Analysis, Processing steps, Incorrect routing information
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[SwitchA-ospf-100] area 0
[SwitchA-ospf-100-area-0.0.0.0] network 192.1.1.0 0.0.0.255
[SwitchA-ospf-100-area-0.0.0.0] quit
3) Configure Switch B
[SwitchB] interface vlan-interface 100
[SwitchB-Vlan-interface100] ip address 192.1.1.3 255.255.255.0
[SwitchB-Vlan-interface100] ospf dr-priority 2
[SwitchB-Vlan-interface100] quit
[SwitchB] router id 3.3.3.3
[SwitchB] ospf 100
[SwitchB-ospf-100] enable link-local-signaling
[SwitchB-ospf-100] enable out-of-band-resynchronization
[SwitchB-ospf-100] area 0
[SwitchB-ospf-100-area-0.0.0.0] network 192.1.1.0 0.0.0.255
[SwitchC-ospf-100-area-0.0.0.0] quit
4) Verify the configuration
# After the configurations on AC, Switch A and Switch B are completed and the switches are running
steadily, perform OSPF GR on AC.
Troubleshooting OSPF Configuration
No OSPF Neighbor Relationship Established
Symptom
No OSPF neighbor relationship can be established.
Analysis
If the physical link and lower layer protocols work well, check OSPF parameters configured on
interfaces. Two neighbors must have the same parameters, such as the area ID, network segment and
mask (a P2P or virtual link may have different network segments and masks), network type. If the
network type is broadcast or NBMA, at least one interface must have a router priority higher than 0.
Processing steps
1) Display OSPF neighbor information using the display ospf peer command.
2) Display OSPF interface information using the display ospf interface command.
3) Ping the neighbor router’s IP address to check connectivity.
4) Check OSPF timers. The neighbor dead interval on an interface must be at least four times the
hello interval.
5) On an NBMA network, using the peer ip-address command to specify the neighbor manually is
required.
6) On an NBMA or a broadcast network, at least one connected interface must have a router priority
higher than 0.
Incorrect Routing Information
Symptom
OSPF cannot find routes to other areas.