The problem is that if you have 64k /48s that would be a /32, but they actually reserve a /44 for each of those /48 users so they use up a /28.
When the global IPv6 (IANA to RIR) allocation policy was proposed, the RIRs promised to stop reserving IPv6 address space and allocate from the /12s they received using the "bisection" method (adding a bit to the prefix length to split a block in half). The rationale behind this approach was to limit the number of independent prefixes allocated to a single ISP because that ISP ran out of space. I am aware that at least one RIR actually followed through with their promise. The last time people cared about dense packing address allocations was around 1993 or so.
Regards, -drc -- to unsubscribe send a message to [EMAIL PROTECTED] with the word 'unsubscribe' in a single line as the message text body. archive: <http://psg.com/lists/rrg/> & ftp://psg.com/pub/lists/rrg
