We can easily troubleshoot OSPF Adjacency Problems By using Debugging. First of all enable Debugging on the device. Then enable Debugging related to OSPF.
--> First of all we need to see whether the router is sending / receiving hello messages. In order to check this enable following command.
# debug ip ospf hello
--> If the router is sending/ receiving hello message and still you have adjacency problem then enable the following debugging command
# debug ip ospf adjacency
--> By using this two commands you will get to know what is the main problem causing OSPF Adjacency Failure.
--> First of all we need to see whether the router is sending / receiving hello messages. In order to check this enable following command.
# debug ip ospf hello
--> If the router is sending/ receiving hello message and still you have adjacency problem then enable the following debugging command
# debug ip ospf adjacency
--> By using this two commands you will get to know what is the main problem causing OSPF Adjacency Failure.
Thanks
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