Novell NETWARE 6-DOCUMENTATION Manual page 1508

Use TCPCON to examine the routing table and determine which
routes are missing.
Check TCPCON for IP errors.
Check TCPCON for ICMP errors.
If you are using RIP, then in INETCFG under Bindings, verify that
the RIP Mode option is not set to Send Only or Receive Only.
If the RIP Version option is set to RIPII, verify that the other routers
also support RIP II.
Verify that no route filters are configured that would block route
information packets for that interface.
If you are using OSPF, verify that the following conditions have been
met:
Routers in the area have the same Authentication Type configured.
All routers on the same network have the same Authentication
Password configured for the interface to the network.
All routers on the same network have the same Hello Intervals
configured for the interface to the network.
The state of each neighbor is either two-way or full in TCPCON
(select Protocol Information > OSPF > Neighbors). If it is not, one of
the two conditions described next will occur. Refer to the next two
paragraphs for an explanation of the corrective actions required.
In TCPCON, there is a router link state advertisement for each router
in your area (select Protocol Information > OSPF > Link State
Advertisements). If these advertisements are not present, verify that
the missing router is active and the correct area ID is configured for
the network interface.
In TCPCON, the number of link state advertisements, Area
Boundary Routers, and Autonomous System Boundary Routers are
the same for each router in your area (select Protocol Information >
OSPF > Areas). Verify that the problem routers are active. Bring
down any router whose routing database is not synchronized with the
databases of its routing neighbors. If the problem persists, reduce the
size of your network or add more memory to the router.
Routes are not exchanged on a LAN.
Verify that the broadcast address is correct.
Troubleshooting
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