RE: What Worked - What Didn't

The salient point here, is that this is not a widely adopted practice. If you feel it should be, by all means, make your case, as the internet community is probably more open to proposals designed to strengthen security now, than at most other times.

it is not a great defense, but it's some defense. like all security efforts, it is not a cure but raises the barrier. i see no reason for inter-isp peering and intra-isp ibgp to be covered fairly quickly. i would suggest having one's provisioning folk working with bgp customers to close that avenue as well, starting with the more critical customers. also, think about your igp. randy