I'm building the core network for an ISP that has 2 points of transit (with two ISPs different, A and B for example) for Internet traffic but I have some issues on the routing Internet.
For a prefix A.B.C.D/X, are there the methods or tools to know exactly that routing over ISP A or ISP B is better (both upstream and downstream traffic)?
Now, I know that there are 250K routes on Internet, i think we can't verify every route. How to solve this problem?
Any information or document is very useful for me.
Thanks for your helping.