Hi Remi, Thanks, inline please,
On Wed, Jul 20, 2011 at 5:45 PM, Rémi Després <[email protected]>wrote: > Hi, Jacni, > > ... > > In addition to Satoru's answer, an ISP that has many IPv4 prefixes can: > - use only a few, or even only one, of its shortest IPv4 prefixes, and > - use IPv4 address sharing to support as many CE's as needed. > > Example: an ISP has a /10, a /11, another /11, a /14, a /15, and a /16 (a > real example I met). > It can: > - use three domains (the /10 and the two /11's), or > - use only the /10, extending Port-set ID by one bit to support as many > CE's > In both cases, no entropy due to the fragmented IPv4 space needs to be > exported to the IPv6 addressing plan. > Jacni>: Ok, I got you point, Another question is to make sure that continuous IPv6 pools (with EA) are assigned on multiple Access Gateways (BNG) within the same 4rd domain. Plus, the reality is even more complicated, For example, there are group/HQ and branches. The shorter prefixes are probably held by the group level, and several/many 4rd domains (according to the sizes of cities under given branch) will be maintained by the branches who can only get fragmented spaces, since a large amount of these spaces come from leftover prefixes returned. Cheers, Jacni > Leftover IPv4 prefixes can then be returned to the community (for free... > or for a price, whatever applies). > > Regards, > RD > > > > Cheers, > Jacni > > _______________________________________________ > Softwires mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/softwires > > >
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