Exactly my point, the recipe could be defined in an RFC and implemented in code, so that the execution cost would be very low. This might be an easier problem to solve than the problem we are trying to address with CIDRizing. I think folks are missing the point. The primary goal of CIDR is to slow the growth of the routing table. Renumbering without CIDR is a pointless waste. It buys you nothing. Renumbering _with_ CIDR allows the addressing to more closely match the topological hierarchy, and thus allows routing to eliminate some noise from the routing system, thus allowing it to scale better. So renumbering helps. However, folks should recall that CIDR _requests_ and _recommends_ that people renumber. However, no one is trying to or has a mechanism to force people to renumber. It's just a matter of being a good citizen. Folks who don't want to be good citizens will exist. So be it. Now, if the extremist parties on all sides could take a deep breath and start being rational, we could get back to work. Tony