On Fri, 1 Feb 2002, Tony Hain wrote: > Tim Chown wrote: > > If that's static /48's, the /29 boundary will need revision...(and > > certainly a /35 would be useless to any medium ISP). > > Did the term 'slow-start' get lost somewhere? As I understand rir > policy, the /35 was never intended to be the only allocation a serious > ISP would get. Static vs dynamic is a non-issue, because either there > are enough prefixes to route the currently connected customers or there > aren't. If a service provider wants to allocate prefixes to customers > that aren't connected, they will need a larger block than the one that > allocates dynamically based on connected status.
IMO, there are two problems (neither are critical, but rather nasty): - /29 is the easy "RIR allocation" limit currently: if that won't be enough, there will be fragmentation: some sTLA's get more than one prefix. Note: at 80% HD ratio, this would only be enough for about 38K customers. - /48 is the easy "organization allocation" limit: consider a university/big organization like Nokia with /48: well enough for for its own infrastructure but completely inadequate for: - giving e.g. dial-in/DSL users a /48 (heh :-) - giving e.g. dial-in/DSL users a /64 (at 80% HD ratio, about 7K users could be supported) ==> also fragmentation.. -- Pekka Savola "Tell me of difficulties surmounted, Netcore Oy not those you stumble over and fall" Systems. Networks. Security. -- Robert Jordan: A Crown of Swords -------------------------------------------------------------------- IETF IPng Working Group Mailing List IPng Home Page: http://playground.sun.com/ipng FTP archive: ftp://playground.sun.com/pub/ipng Direct all administrative requests to [EMAIL PROTECTED] --------------------------------------------------------------------
