[address-policy-wg] Policy Change Request - Allow address allocations for anycast DNS operation

Hi,

On Tue, Jun 15, 2004 at 04:10:57PM +0200, Wilfried Woeber, UniVie/ACOnet wrote:
> >> If you qualify for at least /24 of v4 address space, there shouldn't 
> >> be a problem with current v4 policy?
> >
> >There is.  People don't want to use part of their PA block for the
> >anycast announcement (due to "allocation boundary" filters) and you
> >won't qualify for a /24 PI with just a single IP address used inside
> >the block. 
> 
>   This, together with the fact that (if I remeber correctly!) there is no
>   longer a minimum usage restriction for becoming an LIR should help to
>   solve this problem?!

I can't fully follow you here.  I described the problem, but you seem
to interpret this as a solution?

Take, for example, DENIC.  They are a LIR, and have "their" LIR PA /20
address block (81.91.160.0/20).  People "know" that inside 81/8, only
/20 or larger sized blocks have been allocated, and might filter out
everything more specific than a /20.

So using a /24 out of the PA /20 allocation for anycasting might not
work reliably "enough" to warrant the effort, due to non-reachability
in those networks that have filters set up  (this might be debatable,
and indeed is the key issue whether an independent address block - and 
policy - is "necessary" or not).

DENIC cannot get another "independent" PA block (because the first one
is not at 80% utilization), and a single IP address doesn't qualify for 
a /24 PI.  So they can get neither PA nor PI for this specific purpose.

Now *DENIC* has enough /24 PI networks lying around from de.zz times :-),
but the idea is to have a generic-enough policy that will permit similar
deployments for other "DNS providers" as well.

Gert Doering
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