Neighbor Requirement /Best Command for Fault Isolation
Interfaces must be in up/up state /show ipv6 interface brief
Interfaces must be in the same subnet /show ipv6 interface
Hello and dead timers must match /show ipv6 ospf interface
Router IDs must be unique/ show ipv6 ospf
Must pass routing protocol authentication /show ipv6 ospf interface
Interfaces must not be passive /show ipv6 ospf interface