A friend of mine asked me about the OSPF forwarding address. The question was why must the network type be broadcast for the FA to be set? Why is not point to point and point to multipoint network type valid?
OSPF is one of the protocols where the details are very important. It has lots of bits and pieces to make it run in a proper way. I have described the forwarding address in an earlier post and this time
In OSPF and other routing protocols we have something called forwarding address. This can be used to route traffic in another direction than to the router that originated the LSA. We start with the following topology. It’s a basic OSPF