Per: I had hands experience from EGP, BGP-2, BGP-3, BGP-4, and MP-BGP. Cost/Money/Operational Pain drive transitions. In EGP/BGP-2 it was 12-15 routers. In BGP-3/BGP thousands. Now? I'll let you estimate for Internet routers in the planet. Of course, I like you would like things to be orderly. Sue Hares -----Original Message----- From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu] On Behalf Of Per Gregers Bilse Sent: Friday, November 11, 2005 4:42 PM To: nanog@nanog.org Subject: Re: Level3 Question On Nov 11, 1:14pm tony.li@tony.li wrote:

The only way to get 32-bit AS number support deployed is to run out of AS numbers in the 16 bit space.

Exactly. - When will the Internet deploy X? - Just before it's too late. How many people on this list remember the transition from BGP3 to BGP4 and CIDR? This was, uhh, about 12 years ago. Before that there was an EGP to BGP transition, but that was less of an issue. But history will repeat itself. Not that I see any great evil in that -- people are always busy, have always been. It's a case of which priorities are most pressing, so, indeed, yes, the only way is to run out of the existing resource. Likewise for whatever will provide more address space.-) -- Per