[16882] in North American Network Operators' Group
Re: ARIN allocating /20 netblocks?
daemon@ATHENA.MIT.EDU (Patrick W. Gilmore)
Fri May 15 15:52:35 1998
Date: Fri, 15 May 1998 12:46:54 -0700
To: nanog@merit.edu
From: "Patrick W. Gilmore" <patrick@priori.net>
In-Reply-To: <9118.895260978@intelenet.net>
At 12:36 PM 5/15/98 PDT, Mark D. Nagel wrote:
>One of our customers was recently allocated a /20 netblock from ARIN.
>I had just been ass-u-ming it was a /19 until I cross-checked our
>announcement update with the request from the customer. Is this a
>change in policy (I thought they only allocated /19 or bigger) or did
>I miss something? If the former, are NSPs like Sprint planning to
>update filters to route these new smaller blocks?
Check the ARIN page, http://www.arin.net/initial-isp.html.
Essentially, ARIN allocates a /21 or /20 of a "Reserved" /19. When our
downstream got a /19 from ARIN, he announced the full /19 to defeat the
Draconian Sprint 112 filters and copy-cats.
Check with your downstream. They probably have a reserved /19 they can
announce.
And, of course, double-check with ARIN as this isn't my customer we're
talking about. ;)
>Mark D. Nagel <nagel@intelenet.net>, CCIE #3177
TTFN,
patrick
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Director of Operations, CCIE #2983 fax: +1-650-482-2844
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