On Mon, May 09, 2005 at 11:11:30AM +0100, Tim Chown wrote:
I think it's important we give networks fixed size prefixes to lessen the need for restructuring and renumbering when changing provider.
Agreed. And this prefix size should really be on nibble boundaries (but I guess noone disagrees with that).
So I would say /64, /48, /48.
The ISP's who have got the /20-ish space already have planned this, I suspect. It's the ones trying to run an ISP off a /32 that haven't?
Even with /32 you can nicely run a typical access ISP with. You need more if you have any serious mass subscriber base, like residential DSL, 3G/GPRS etc. The large-size allocation to which I was involved with designing the addressing plan definately plans to give every customer a /48, even if no routed infrastructure is in place at the customer yet. Assign /48 and route first /64 out of it initially. If customer wants more, route the rest of the /48 to the customer. This works for hosting customers as well as any leased line access customer. Also for "dialup" like PPPoE/A DSL (RADIUS). I ponder wether it would make sense to write up an example addressing plan for a /32 standard allocation which people can use as a template... Best regards, Daniel -- CLUE-RIPE -- Jabber: dr@cluenet.de -- dr@IRCnet -- PGP: 0xA85C8AA0