My final design topic is about choosing the best path. I intend to use a server which can get the best route and return the result(Centralized processing, the result will contain all node information on the path).

So I need to build a structure diagram of network topology, I think that I can use the neighbor table to get my result, but don't know how to get the neighbor table of a router.

There may be other better solutions to get the topology.If can't do it, saving the routing table in advance can be a good idea.

Really thanks for answering.