H3C Technologies H3C S10500 Series Switches - Manual (Page 324)

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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.