Should note that if you don't have enough networking knowledge, this is an excellent way to build a gun to shoot yourself in the foot with. If you misconfigure BGP or don't take basic precautions such as sanity filters on in- and outbound routes, you can easily do something silly like overwrite each server's default route, taking down all your services.

It's not rocket science, but it is complex, and building something complex you don't fully understand for production services can be a very bad idea.