Troubleshooting guide

BSR Troubleshooting Guide
7-110
Handling Router Neighbor Misconfigurations
The following sections explain why OSPF routers may not exchange information to
establish neighbor relationships:
• Misconfigured Router
• Mismatched OSPF Parameters
Misconfigured Router
Follow these steps to resolve a misconfigured or missing network router command:
1. Use the show ip ospf interfaces command in Privileged EXEC mode to
determine which interfaces have OSPF enabled.
2. If the output displays an interface that should be running OSPF, but is not, use the
show running-config command in Privileged EXEC mode to view the router
configuration.
3. Make sure that network router configuration commands are specified for each
interface on which OSPF should run. For example, if the IP address of Ethernet
interface 0 is 100.148.22.2 with a subnet mask of 255.255.255.0, enter the
following commands to enable OSPF on the interface:
RDN(config)#router ospf
RDN(config-ospf)#network 100.148.22.0.0.0.0.255 area 0
4. Ensure the proper addresses, wildcard masks, and other variables are properly
specified. To configure an OSPF routing process, use the router ospf command
in Global Configuration mode, as shown in the following example:
RDN(config)#router ospf
Note: There is no relation between OSPF wildcard masks (used in OSPF
network commands) and the subnet mask configured as part of an interface
IP address.