I wonder what will change (if anything) when ARIN runs out of IPv4 space.
In routing, probably not much. The market in used IPv4 space will come out from the shadows, and we'll see endless arguments between buyers of IPv4 space and ARIN, when ARIN refuses the updates to the address registry. I don't see any reason for the people who run defaultless routers all over the world to change the /24 rule. If they accept longer prefixes it'll cost them real money as their route tables bloat, and all they get is some marginal connectivity to people too dumb or too cheap to find a /24 of their own. Anyone who buys a /27 without an arrangement for backup routing from whoever routes the surrounding /24 is a fool. Regards, John Levine, johnl@iecc.com, Primary Perpetrator of "The Internet for Dummies", Please consider the environment before reading this e-mail. http://jl.ly PS: Yes, I know you don't "buy" space from ARIN.