Re: Global IPv6 PI policy proposal

JORDI PALET MARTINEZ wrote:
> Provider-Independent IPv6 assignment size to End-User-Organizations: The
> minimum size of the assignment is /32. However a larger assignment can be
> provided if duly documented and justified.

4 billion subnets seems to be an excessive ammount of space for a single
organization.  That is also alot of /48's that could be deaggregated,
depending on how well things are filtered.

At one time I supported a /32 minimum for any type of assignment.  Since
then I have found the "It is irresponsible to waste space even if it
seems infinite or the consumption insignificant" argument very
compelling.

ARIN settled on a /48 minimum out of separate, easily identifiable
space.  This allows deaggregated /48's from LIR space to be filtered
while allowing the PI /48's.

An alternate approach that I also support is to set the minimum
at /44 so there are almost no official /48 prefixes.  This
approach is not perfect as it provides 16 /48's that could be
deaggregated depending on how people filter.

> Subsequent assignment size to End-User-Organizations: Whenever possible,
> further assignments will be made from adjacent address blocks, but only if
> duly documented and justified.
>  
> Assignment super-block: Those assignments shall be allocated from a separate
> super-block to allow for LIRs to filter them if required.

My recommendation is that a /16 be set aside out of each RIR's
address reserve for PI assignments to smiplify filtering.

> Expiry for those assignments: In the case of assignments done under this
> proposal in order to address the multihoming issue, they will need to return
> the block in a maximum period of 3 years after a technically correct
> alternative valid and deployable solution becomes accepted by the community.
> Alternatively, to avoid renumbering, some of the organizations affected by
> this, could become an LIR, if they qualify for it.

Any attempts to reclaim address space by force could be difficult,
expensive and disruptive.  "Temporary" assignments also discourageuse by
large organizations. Even with the LIR conversion option it
sounds like there is too much uncertainty for a large org to make
a commitment to IPv6.

- Kevin
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