1. You are correct, you do not need to configure neighbors.
2. OSPF will load balance provided that the LL interface and the FR sub-interface to a location each have the same cost. You can make them have the same cost via the bandwidth interface command or the ip ospf cost interface command.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...