Troubleshooting Ospfv3 Configuration; No Ospfv3 Neighbor Relationship Established; Incorrect Routing Information - H3C S5800 Series Configuration Manual

The S5800 series switches are centralized devices that support IRF. They can act as a GR Helper
before forming an IRF; they can form a distributed chassis switch in a logical sense and act as a GR
Restarter after forming an IRF. Active and standby switchover in this document refers to the switching
of the master for IRF devices.

Troubleshooting OSPFv3 Configuration

No OSPFv3 Neighbor Relationship Established

Symptom
No OSPF neighbor relationship can be established.
Analysis
If the physical link and lower protocol work well, check OSPF parameters configured on interfaces. The
two neighboring interfaces must have the same parameters, such as the area ID, network segment
and mask and network type. If the network type is broadcast, at least one interface must have a DR
priority higher than 0.
Process steps
1) Display neighbor information using the display ospfv3 peer command.
2) Display OSPFv3 interface information using the display ospfv3 interface command.
3) Ping the neighbor router's IP address to check connectivity.
4) Check OSPF timers. The dead interval on an interface must be at least four times the hello
interval.
5) On a broadcast network, at least one interface must have a DR priority higher than 0.

Incorrect Routing Information

Symptom
OSPFv3 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 be associated with the Stub area.
Solution
1) Use the display ospfv3 peer command to display OSPFv3 neighbors.
2) Use the display ospfv3 interface command to display OSPFv3 interface information.
3) Use the display ospfv3 lsdb command to display Link State Database information to check
integrity.
9-28