In article <m2poka5e9p.wl-randy@xxxxxxx> you write: >> We do have the technology to provide a CERT to every customer. See >> SIDR. > >see frequent residential address reassignment That's not really a problem, since vanishingly few resi customers are multihomed. The problem occurs with customers who are big enough to be multihomed but not so big that they have a staff that knows all of the magic of BGP and expensive routers. R's, John