[89124] in North American Network Operators' Group
Re: Shim6 vs PI addressing
daemon@ATHENA.MIT.EDU (David Barak)
Thu Mar 2 21:54:59 2006
Date: Thu, 2 Mar 2006 18:54:31 -0800 (PST)
From: David Barak <thegameiam@yahoo.com>
To: nanog@merit.edu
In-Reply-To: <20060301172956.GF66133@puck.nether.net>
Errors-To: owner-nanog@merit.edu
--- Jared Mauch <jared@puck.nether.net> wrote:
> I think you're missing that some people do odd
> things with their IPs as well, like have one ASN and
> 35
> different sites where they connect to their upstream
> Tier69.net
> all with the same ASN. This means that their 35
> offices/sites
> will each need a /32, not one per the entire asn in
> the table.
No, that's an argument for a /32 and a bunch of /48
allocations heard by a single provider, who's getting
paid to carry them, but are not advertised to the rest
of the Internet.
> And they may use different carriers in different
> cities. Obviously this doesn't fit the definition
> that some have
> of "autonomous system", as these are 35 different
> discrete networks
> that share a globally unique identifier of sorts.
Well, wait a minute - what would these people do
TODAY? Some build tunnel backbones, some use one ASN
per city, some do "allowas-in" or other things of that
nature. I would venture to say that most medium to
large enterprises don't use straight-Internet with no
VPN of any kind to support their enterprise backbones
anymore, simply for security reasons.
My argument still stands - if having an ASN is equated
with having a routable netblock, then each of those
cases results in the enterprise being able to pass
packets, and only the "one ASN per city" approach
requires multiple netblocks.
-David
David Barak
Need Geek Rock? Try The Franchise:
http://www.listentothefranchise.com
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