> Every router knows from static inspection of its route tables which interface a packet with the bogus packets source route would get sent to it if were the de

> Every router knows from static inspection of its route tables which interface a packet with the bogus packets source route would get sent to it if were the destination. It's considerably more complicated than that. Also, as much as we might try, BCP38 adoption is terrible. Given the social and technical problems with BCP38 adoption I doubt we'll see source address verification in our lifetime. It's a mess. The SAVI WG at the IETF Is working on this, but it's a very tough problem.