At 11:18 AM -0800 1/23/02, JJ Behrens wrote: >Please forgive me for being a newbie, but it seems wise to allow >subnetting of the lower 64 bits. Afterall, it would be terrible if my >dialup ISP assigned a /64 to me, and I had to rely on some IPv6 mythical >NAT to do subnetting!
The IAB/IESG recommendation to the registries, which has subsequently been adopted by all of them, is that the default/standard unit of allocation to all end subscribers is a /48, and when they judge an ISP's utilization rate of IPv6 space, it will be on the basis of /48s per subscriber. Of course, the registries have no enforcement power that can prevent an ISP from making smaller allocations (i.e., longer prefixes), so we hope that market forces will do the job. At least an ISP will not be able to justify a longer prefix by claiming shortage of address space or registry requirements. Steve -------------------------------------------------------------------- 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] --------------------------------------------------------------------
