nanog mailing list archives

Re: Post-Exhaustion-phase "punishment" for early adopters


From: George Herbert <george.herbert () gmail com>
Date: Tue, 8 Feb 2011 20:21:02 -0800

On Tue, Feb 8, 2011 at 6:54 PM, David Barak <thegameiam () yahoo com> wrote:


From: R. Benjamin Kessler <Ben.Kessler () zenetra com>

From: George Herbert [mailto:george.herbert () gmail com]

"Let's just grab 2/8, it's not routed on the Internet..."

+1

I was consulting for a financial services firm in the late '90s that was
acquired by a large east-coast bank; the bank's brilliant scheme >was to
renumber all new acquisitions *out* of RFC1918 space and into (at the time)
bogon space.


If I recall, some of the arguments were "they were too big to fit into RFC1918
space" and by having all of their divisions in non->RFC1918 space it would make
it easier for them to acquire new companies who used RFC1918 space internally.

I wonder what they're doing now...

<fireproof underwear = on>

If we make the assumption that the hosts which were numbered in the space
formerly known as bogon are typical enterprise hosts, it wouldn't be surprising
if they were just fine: they probably don't *want* to have end-to-end
connectivity, and are perfectly happy with the proxy-everything approach.

If you're going to NAT everything anyway, then the damage done by having 2/8 on
both sides of the NAT isn't any worse than having 10/8 on both sides of the
NAT.  If it turns out that they start running across the hosts in 2/8 as
customers, those can get NATted into some third block, with probably a lot less
effort and confusion than trying to sort out the chunks of overlapping 10/8s.

If you could really proxy everything, you'd be able to use 10/8
everywhere and never hit problems, even if two private peers overlap
in usage within 10/8.

I can assure you that the "proxy everything" statement breaks down
with every enterprise-to-enterprise interconnection project I've run
into.  There are some protocols that are just not meant to do that.


-- 
-george william herbert
george.herbert () gmail com


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