Guys, i apologize if i've just missed a topic, but i can't quite find a descriptive enough topic on ospf. Here's the deal. I've read the manual twice and tried to implement it a few times. The only thing lacking in the manual is two areas, which is required(i think) in my goal. Anyways, just a few questions to hopefully get me started on the right track in my understanding.
1. In an area, do you have to have separate private ip subnets for each link between routers or can you have the same subnet across the area. Please bear with me, i might me missing something obvious.
Ex. Router A,B,C in area 1. Instead of A-B(10.0.1.0/24),A-C(10.0.2.0/24, B-C(10.0.3.0/24). Could you do: A(10.0.1.1)-B(10.0.1.2)-C(10.0.1.3)
2. In a situation with two areas...How does one area access the other area when they are on different ip subnets? I've seen where the ospf dynamically provides the routes out. I might just be missing a configuration attribute where i don't see the route back down the chain.
3. I understand the router-id takes the highest available ip address, but what part does this actually play in the whole ospf environment.