[ppml] Various IPv6 issues

David Conrad drc at virtualized.org
Fri Aug 24 00:03:30 EDT 2007

Oops.  APNIC is allocating using bisection, but it does not appear  
the other RIRs are.  Apologies to the fine folks at APNIC.


On Aug 23, 2007, at 8:28 PM, David Conrad wrote:

> Hi,
> On Aug 23, 2007, at 8:09 PM, mack wrote:
>> 4) ARIN seems to be allocating on /29 boundaries to allow expansion
>> while maintaining aggregation.
>> This is a good thing.  Obviously gaps can be filled in later if
>> needed.
> I'm confused.
> One of the justifications for the allocation of /12s to the RIRs was
> that the RIRs needed to use "bisection allocation" and they needed an
> insanely huge pool in order to facilitate this.
> It does not appear that any of the RIRs are doing this.
> This isn't a good thing.  If an LIR grows beyond a /29, that LIR will
> now need 2 prefixes.  If bisection had been used, ARIN could grow the
> single prefix.
> Is how ARIN allocates prefixes to LIRs a policy issue or an
> operational issue?
>> Example with two locations, 2 transit providers and a link:
>> Transit1 in location A.
>> Transit2 in location B.
>> Transport between A and B via Layer 2 connection (billed at 95th).
>> Advertising the same prefix in both locations means that traffic
>> from Transit2 will exit only in location B.
>> But may actually be destined for A.
>> The obvious solution is to apply for a second /32.
> Yep.
>> I am not sure how ARIN expects these aspects to be handled.
> I'm not sure this is an ARIN issue.  Rather I suspect it is a
> protocol issue (currently being discussed in the ram at iab.org and
> rrg at psg.com).
> Regards,
> -drc
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