On Feb 13, 2012, at 12:34 PM, Doug Barton wrote: >> If an ISP can't use a shared block, they'll go ask their RIR for a block - >> and given that they demonstrably have the need (lots of customers), they >> will get it. Multiply than by N providers. > > If the RIRs do not deny these requests there is likely to be a revolt. > OTOH that may be a good thing .... What grounds would an RIR have to deny this request? >> - See CGN deployed using various hacks (e.g. squatting on space) > > Incredibly unlikely to happen. The ISPs are smart enough to know that > this will cause them more headaches than its worth. You're joking, right? >> - See CGN deployed using a block of space allocated for that purpose > If the IETF rightly denies this request then the ISPs are going to be > forced to use the proper option, 1918 space. No. ISPs will do what makes business sense for them. Some of these ISPs have already indicated that RFC 1918 won't work for them. As such, they'll take whatever steps they feel is in their best interests. Whether this is choosing some large block of (currently) unadvertised space or requesting a large block from their RIR (while they still can) is a decision they will make. Regards, -drc _______________________________________________ Ietf mailing list Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf