On each router:
Code:
show ip interface brief
show ip protocols
Step 1: If any interface is not showing
Up Up in the
show ip interface brief, fix it.
Step 2: Now compare every interface you see in the
show ip interface brief with the output of
show ip protocolsIf every interface shown in the output of
show ip protocols is NOT covered in the output of
show ip protocols then fix it.
Step 3: Check you have the same subnet mask at each end of each interconnecting link, and of course that each end of each interconnecting link IS indeed on the same subnet AND area.
If you have made significant changes to the OSPF configuration, issue a
clear ip ospf processCover those 3 and you will solve 99% of OSPF configuration problems.
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RedNectarhttp://rednectar.net@rednectarchrisGNS3 WorkBench-a VMware image of Ubuntu with GNS3 and VPCS installed and a collection of exercises/labs