[34835] in North American Network Operators' Group
RE: Minimum globally routable address space?
daemon@ATHENA.MIT.EDU (Paul Schultz)
Tue Feb 20 14:18:49 2001
Message-ID: <6457C0B03009D4118E4700062938A6CB02F59997@DAREX01>
From: Paul Schultz <PSchultz@corp.darwin.net>
To: "'dans@icss.com'" <dans@icss.com>, nanog@merit.edu
Date: Tue, 20 Feb 2001 14:14:42 -0500
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If you're going to get a /20, I'd say get your own from ARIN. The biggest
pain of a routing policy I've had to deal with (as far as other people's
policies go) is Verio, who only accepts /20 and greater for all of the
recently opened legacy class A networks (64., 65., 66 etc)
As long as you don't try to slice and dice your /20's into more specific
blocks to come out of other places, you'll be fine.
Paul
-----Original Message-----
From: Dan Streufert [mailto:dans@icss.com]
Sent: Tuesday, February 20, 2001 1:34 PM
To: nanog@merit.edu
Subject: Minimum globally routable address space?
I am writing from a small, multi-homed ISP. We are contemplating
terminating our relationship with one of our providers, and will need to
replace that non-portable space.
We are debating between getting a /20 from ARIN (we have justifiable usage)
or a /20 from our other provider.
On one hand, portability would be nice. On the other, is a /20 globally
routable in practice? I seem to remember hearing that /19 was the smallest
that would not be filtered by anyone.
If anyone knows if there are filters for /20s out there, I would be
interested to know who filters them.
Thanks,
Dan Streufert
