Micro-allocation needed?

William Pitcock nenolod at systeminplace.net
Mon Jun 21 16:50:46 CDT 2010


On Mon, 2010-06-21 at 23:42 +0200, Ask Bjørn Hansen wrote:
> On Jun 21, 2010, at 23:34, William Pitcock wrote:
> 
> > On Mon, 2010-06-21 at 23:32 +0200, Ask Bjørn Hansen wrote:
> >> Hi everyone,
> >> 
> >> We're going to anycast a /24 for some DNS servers (and possibly another UDP based service)[1].
> >> 
> >> I see that ARIN are listing on https://www.arin.net/knowledge/ip_blocks.html the smallest allocations from each prefix.   Will we have trouble getting a /24 announced if we take it from a regular /20?
> > 
> > No, you can split up allocations as you want, provided you can prove you
> > own them.
> > 
> > Some providers however, won't announce anything smaller than a /24.
> 
> I guess to rephrase my question:
> 
> Are there (a significant number of) providers that will filter a /24 announcement from an ARIN prefix not in the list of prefixes where they allocate /24 blocks.

I have yet to encounter any.  They are "your IPs" as far as they are
concerned, so they'll typically announce whatever you ask as long as
they are "your IPs".

William





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