This is an OSPF troubleshooting video.
In this lab, we've been told that right at one on the left, Conte ping the loopback of router four.
Rather for has a loopback interface of 4.4.4.4 and rather one is not able to ping that loopback.
Can you resolve this network issue?
Can you find the problem?
Correct it and then test that the network works properly.
You should ensure that all devices can ping each other.
Download the attached packet, trace a file and see if you can do this yourself or watch the next video
and watch me resolve this issue.