Re: Who does source address validation? (was Re: what's that smell?)

[Danny McPherson <danny () tcb net>]

> If there is a magic solution, I would love to hear about it.

I strongly doubt any of the large providers perform dataplane source 
address validation from peers.  Heck, I doubt any perform explicit 
route filtering on routes learned from peers at the control plane.

Ideally, one would first employ some mechanism to generate 
*explicit* ingress BGP route filters.  With BGP Route Refresh 
the largest offshoot (manual session reset or "bouncing the
route") is no longer necessary.