Troubleshooting Ospf Configuration; No Ospf Neighbor Relationship Established; Incorrect Routing Information - HP MSR2000 series Configuration Manual

RelyNextHop: 0.0.0.0
Tunnel ID: 0x0
BKTunnel ID: 0x0
The output shows that Switch A communicates with Switch B through VLAN-interface 11.

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, verify 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).
Solution
Use the display ospf peer command to display OSPF neighbor information.
1.
Use the display ospf interface command to display OSPF interface information.
2.
Ping the neighbor router's IP address to verify connectivity.
3.
Verify OSPF timers. The dead interval on an interface must be at least four times the hello interval.
4.
Use the peer ip-address command to specify the neighbor manually on an NBMA network.
5.
On an NBMA or a broadcast network, at least one connected interface must have a router priority
6.
higher than 0.

Incorrect routing information

Symptom
OSPF cannot find routes to other areas.
Analysis
The backbone area must maintain connectivity to all other areas. If a router connects to more than one
area, at least one area must be connected to the backbone. The backbone cannot be configured as a
stub area.
In a Stub area, all routers cannot receive external routes, and all interfaces connected to the stub area
must belong to the stub area.
Solution
Use the display ospf peer command to display neighbors.
1.
Use the display ospf interface command to display OSPF interface information.
2.
Use the display ospf lsdb command to display the LSDB to verify its integrity.
3.
State: Active Adv
Tag: 0
Neighbor : 0.0.0.0
Label: NULL
BKLabel: NULL
Age: 00h58m10s
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