Multi-Homed Routing
Tom
tom at light.sdf.com
Mon Sep 1 21:54:17 PDT 2003
On Mon, 1 Sep 2003, Doug Barton wrote:
> On Mon, 1 Sep 2003, Tom wrote:
>
> > For those in the Americas, ARIN will not give you anything less than a
> > /19
>
> If this was ever true, it hasn't been true for a long time:
>
> http://www.arin.net/policy/ipv4.html
Strictly speaking it is a /20 now. It was changed. But to get a /20,
you need to prove that you are actually using a /20's worth of space of
already. That means completing filling at least 12 class-Cs. And by
getting a block from ARIN, you are compelled to re-number, meaning most of
your /20 is gone. That is ok, if your network isn't growing too quickly,
but if you are adding lots yet, most networks will want a /19.
You certainly are not going to get a /24 from ARIN:
ARIN allocates IP address prefixes no longer than /20. If allocations
smaller than /20 are needed, ISPs should request address space from their
upstream provider.
> Doug
>
> --
Tom
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