HPE FlexNetwork HSR6800 Configuration Manual page 348

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 interfaces connected to the stub area
must be associated with the stub area.
Solution
Use the display ospfv3 peer command to display OSPFv3 neighbors.
1.
Use the display ospfv3 interface command to display OSPFv3 interface information.
2.
Use the display ospfv3 lsdb command to display LSDB information to check integrity.
3.
Display information about area configuration using the display current-configuration
4.
configuration command. If more than two areas are configured, at least one area is connected
to the backbone.
In a stub area, all routers are configured with the stub command.
5.
If a virtual link is configured, use the display ospfv3 vlink command to check the neighbor
6.
state.
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