On Apr 3, 2012, at 11:29 PM, Mark Andrews wrote: > Total hogwash. Add a bit of source address based routing within the enterprise so that you hit the right exit routers for the source address being used. Tag route entries with valid source prefixes. Add redirect based on source address signaling. that's about 10% of the complexity for the edge network, and the author's point is that it's something they don't need to deal with in IPv4 due to NAT. I think the author of the article would point to the above tone as characteristic of the "priesthood" he's complaining about. You might want to rethink that.