[38821] in North American Network Operators' Group
Re: standards for giving out blocks of IP addresses
daemon@ATHENA.MIT.EDU (up@3.am)
Sat Jun 16 12:47:04 2001
Date: Sat, 16 Jun 2001 12:46:38 -0400 (EDT)
From: up@3.am
To: nanog@merit.edu
In-Reply-To: <20010616112705.A5434@semihuman.com>
Message-ID: <Pine.BSF.4.10.10106161237520.3581-100000@richard2.pil.net>
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It's not really a question of what makes sense, it's what you need to do
to keep ARIN happy. As an ISP, if you only apply the 25% / 50% rule to
your customers, how are you supposed to demonstrate 80% utilization to
ARIN when requesting any kind of allocation?
If you've handed out a whole bunch of /24 - /29 subnets to your customers
and they are compliant with RFC2050, this could well result in a situation
where you've depleted nearly all of your address space, yet are nowhere
near 80% utilization or your, say, /21 from your upstream. Is ARIN going
to allocate you a /20?
On Sat, 16 Jun 2001, Christopher A. Woodfield wrote:
> The 80% utilization rule makes sense for ADDITIONAL allocations, where an
> end user already has space but needs more. Of course, exceptions can be
> made for large deployments (customer has 150 hosts on a single /24, but
> needs two more for a 400-host data center, etc.)
>
> For initial allocations, the 50% rule makes the most sense, IMHO.
>
> -Chris
>
> On Sat, Jun 16, 2001 at 11:10:08AM -0400, Charles Scott wrote:
> >
> > On Sat, 16 Jun 2001 up@3.am wrote:
> > >
> > > IIRC, Sprint wanted us to show 80% utilization within 3 months(!), citing
> > > ARIN guidelines...
> >
> > James:
> > That's for allocation to ISP's. The RFC refered to end user utilization
> > of the address space (see http://www.arin.net/regserv/ip-assignment.html).
> > I've seen some ISP's incorrectly quote the 80% utilization to customers
> > and expect them to achieve that before assigning them more IP address
> > space.
> >
> > Chuck
> >
> >
>
> --
> ---------------------------
> Christopher A. Woodfield rekoil@semihuman.com
>
> PGP Public Key: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xB887618B
>
James Smallacombe PlantageNet, Inc. CEO and Janitor
up@3.am http://3.am
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