H3C Technologies H3C SecPath F1000-E - Manual (Page 466)

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4. Check OSPF timers. The dead interval on an interface must be at least four times the hello interval.
5. On an NBMA network, using the peer ip-address command to specify the neighbor manually is
required.
6. On an NBMA or a broadcast network, at least one connected interface must have a router priority
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
1. Use the display ospf peer command to display neighbors.
2. Use the display ospf interface command to display OSPF interface information.
3. Use the display ospf lsdb command to display the Link State Database to check its integrity.
4. Display information about area configuration using the display current-configuration
configuration ospf command. If more than two areas are configured, at least one area is
connected to the backbone.
5. In a Stub area, all routers attached are configured with the stub command. In an NSSA area, all
routers attached are configured with the nssa command.
6. If a virtual link is configured, use the display ospf vlink command to check the state of the virtual
link.
Configuration guidelines
When you configre OSPF, follow these guidelines:
• OSPF multiprocess is not supported on the Web interface. Enabling OSPF creates process 1, and
disabling OSPF removes process 1.
• After OSPF is enabled, the router ID for route management is used.
• The OSPF interface list displays all interfaces enabled with OSPF.
To configure OSPF packet authentication in and area, you must configure the same authentication mode
(non-authentication, simple authentication or MD5 authentication) on all the routers of the area. The
authentication mode and password for interfaces attached to a network segment must be identical. In the
Web interface configuration, the authentication mode of the interface firstly configured with
authentication information is taken as the authentication mode of the area.