Operation Manual – IPv4 Routing
H3C S3610&S5510 Series Ethernet Switches
Chapter 3 OSPF Configuration
3-65
III. Processing steps
1)
Display OSPF neighbor information using the
display ospf peer
command.
2)
Display OSPF interface information using the
display ospf 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 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.
3.11.2 Incorrect Routing Information
I. Symptom
OSPF cannot find routes to other areas.
II. 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.
III. 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 interface connected to which 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.
