Todd Underwood was a little late

Lee Howard lee at
Mon Jun 21 17:01:49 UTC 2010

> -----Original Message-----
> From: Michael Dillon [mailto:wavetossed at]
> Sent: Saturday, June 19, 2010 12:39 PM
> To: Lee Howard
> Cc: Todd Underwood; Christopher Morrow; nanog at
> Subject: Re: Todd Underwood was a little late
> " "Registered but unrouted" would include space that is in use in large
> > private networks that aren't visible from your standard sources for
> > route views, such as U.S. DoD (6, 11, 22, 26, 28, 29, 30 /8) or U.K.
> > MoD (25/8).
> Have you verified each of these address ranges or are you just a mindless
> robot repeating urban legends?

Turing test?  
"standard sources for route views" = "route-views"
> By your definition, there is an awful lot more "registered but unrouted"
> and researchers have been reporting on this for 10 years or more. In order
> to correctly identify what you think you are talking about, you need to
> into account the date a range was registered and the date that you scanned
> the data. If the difference between the two dates is less than some small
> number, say one year, then it is probably routed space which has not yet
> been routed but soon will be. Different people will want to set that
> at different timescales for obvious reasons.

I also chose not to define "The Internet" or "routing table" and avoided
like "DFZ" and "WTF."

> I encourage someone to do the work to list all such ranges along with the
> dates, and supply them as a feed, like Cymru does. Best would be to allow
> the feed recipient to filter based on age of block.

Why?  Just because it's never been routed doesn't mean it never will be.
I said "unlikely to be routed," but using such space is a game of chance.
Unless, of course, somebody at one of those organizations said, "This
prefix will never be announced to "the Internet," where "the Internet" is
defined in a meaningful way to the engineer applying the filter.

> > and starting to use addresses like these already (for devices not
> > of IPv6) for internal networking (not publically routed).  I believe
> > is generally considered bad citizenship, but I'm interested in why?
> Stupidity. Many people have no historical perspective and think that the
> only users of I{P address space that matter are ISPs. I don't consider it
> bad citizenship if the "adopted" space is not routed publicly, and even
> the definition of "publicly" is hard to pin down. If someone wants to
> such space to a 100 or so ASNs in Russia, Kazakhstan, Kirghizstan,
> Afghanistan and China, then I don't think that they are blatantly being
> bad Internet citizens. Particularly if they carefully chose whose
> to "adopt".

So you support Todd Underwood's proposal?
> > Is there a range most people camp on?
> No. And it would be dumb to do that. Smarter is to use some range
> that nobody else is known to be camping on except the registrant
> and their network is geographically distant from yours.

Geographically, not topologically, or usefully?

> --Michael Dillon
> P.S. At this point, the IPv6 transition has failed, unlike the Y2K
> transition, and

For certain values of "fail."  The odds of a dual-stack transition as
envisioned by the IETF are vanishingly small, but IPv6 will be a significant
part of the coping strategies once RIRs allocate their last blocks of IPv4.

> P.P.S. I saw a report that someone, somewhere, had analysed some data
> which indicates that IP address allocation rates are increasing and there
> a real possibility that we will runout by the end of this year, 2010.
> Does anyone
> know where I can find the actual analysis that led to this report?

Geoff Huston's data are available, I think, so you can crunch your own 
numbers.  InfoWorld had a chart where they only used five months of
allocations to project the future, and it's not clear how many data points
they used to draw their line.
As of today, I see ten /8s assigned by IANA in 2010.  I count 15 remaining
/8s.  When IANA has only five remaining, they will allocate one to each
RIR.  Will the last six months look like the first six months?  Faster or


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