in RFC 4750 page 53, there is a parameter called "ospfNbrIpAddr", I am not sure exactly what it means.
Suppose I have two router, they are connected through physical ethernet port1, router A port1: ip 22.214.171.124/24, router B port1: ip 126.96.36.199/24. In this case, ospfNbrIpAddr is 188.8.131.52, is this right?
Suppose now two routers are connected with GRE tunnel through physical port1. router A port1: 184.108.40.206/24, GRE_A: 10.10.10.1/24, router B port1: 220.127.116.11.2/24, GRE_B: 10.10.10.2/24, now, ospfNbrIpAddr should set to 18.104.22.168, is this right?
And I have no idea what happened when they connect through unnumbered port? what is "address of another of the neighbor's interfaces"? It can be any?
Thanks for any help, this question is urgent, and please answer with authorized source, thanks.