Re: [sig-policy] prop-087: IPv6 address allocation fordeployment purpose
Thank you for your reply.
| > ----------------------------------
| > Current IPv6 address allocation policy is basically based on number of
| > subscribers the applicant will have , but this does not allow
| > sufficient allocation size to adequately deploy some IPv6
| > protocols. For example, the "6rd" protocol needs more than /32 to
| > implement adequately in an ISP network due to technical reasons
| > .
| Reference  does not say that 6rd needs more than a /32 for
| It says that it needs more than a /32 should the ISP want to encode the
| entire IPv4 address the customer uses.
| How many ISPs use the entire IPv4 address space for their customer
| public address space?
| I think the answer is none. ;-)
I'm sorry if I misunderstand your comment, but the problem is not
number of addresses but prefixes of the addresses.
If ISPs use a same address prefix for all users, it is possible to
shorten the encoded prefix. I'm not sure how many ISPs request and get
additional address blocks under same IPv4 address prefixes, but I
suppose there are not so many ISPs that use a single prefix for all
of their customers.
| So using 6rd as a justification for getting more than a /32 seems rather
| surprising to me.
| Perhaps the proposal would benefit from an explanation as to why
| (technically and operationally) the entire IPv4 address needs to be
| encoded, rather than, say the final 16 bits which would still give the
| end user an entire /48 to play with. Even an ISP who uses an IPv4 /8 for
| customer facing addresses can still give each customer a /56. And even
| if they had an IPv4 /8, they could in theory use that to justify /24
| worth of IPv6 address space - which would then let them encode the
| entire IPv4 address for 6rd to give each customer a /56 - or the final
| 24 bits to give the customer a /48. Etc.
OK, I'll try to explain this point in my proposed text or presentation
One request to APNIC Secretariat, could you show the allocation
statistics that how many IPv4 address holders obtain addinional
address blocks, and if possible, how may multiple IPv4 address block
holders above got same IPv4 address prefixes? (e.g. initial address is
184.108.40.206/22 and additonal address is also under 220.127.116.11/8)