[16907] in North American Network Operators' Group
Re: ARIN allocating /20 netblocks?
daemon@ATHENA.MIT.EDU (Brett Frankenberger)
Sat May 16 16:55:44 1998
From: Brett Frankenberger <brettf@netcom.com>
To: nanog@merit.edu
Date: Sat, 16 May 1998 15:49:55 -0500 (CDT)
In-Reply-To: <Pine.LNX.3.95.980516142655.436U-100000@tarkin.fdt.net> from "Jon Lewis" at May 16, 98 03:07:20 pm
:: Jon Lewis writes ::
>
> The change made it possible for many "small" ISPs to truely multihome.
> FDT is one of them. When I found out about "the change", I was about to
> renumber FDT into Digex address space, since we did not qualify under the
> old rules for an ARIN CIDR block (immediately fill 80% of a /19). The
> /20 Digex was going to give us was in filtered space, meaning anyone
> filtering BGP like Sprint would not see our advertisements and would only
> have reached us through Digex...making our additional T1's to the net
> somewhat pointless.
Really? What is their new policy? Suppose you can only fill 60% of a
/19 ... do they give you a /20 (with permission to announce the /19)
and force you to use provider space for the other 819.2 addresses that
you need? My point is this: 100% of a /20 is 50% of a /19 ... so if
you justify need for more than 50% of a /19, that should be
jutification for a /19. (less than 50% of a /19 could be satisfied by a
/20). (and likewise for other sizes, both larger and smaller than /19).
Does ARIN not see it that way?
- Brett (brettf@netcom.com)
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