370
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, routers cannot receive external routes, and 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.
4.
Display information about area configuration using the
display current-configuration
configuration
command. If more than two areas are configured, at least one area is
connected to the backbone.
5.
In a stub area, all routers are configured with the
stub
command.
6.
If a virtual link is configured, use the
display ospf vlink
command to check the neighbor
state.
