troubleshoot adjacency issues with two routers that aren't establishing a neighbor relationship in OSPF
troubleshoot a situation where OSPF is not establishing a relationship across the port channel
troubleshoot a situation where two routers are not forming an OSPF adjacency, even though they are on the same IPv6 subnet
troubleshoot a situation where a route for one of a router's loopback interfaces is not being propagated throughout the network, but two other loopback interfaces are