DoD IP Space

Tom Beecher beecher at
Fri Feb 12 16:30:22 UTC 2021

> For most networks there is almost no pain in enabling IPv6.

A startup vendor, formed by long time industry veterans, released brand new
products inside of the last 8 years that did not yet have IPv6 support
because their software, also created by them from scratch, did not yet
support it. It does now, but one could argue that it's mind boggling this
happened in the first place.

When experienced industry individuals decide that V6 is second class enough
to chop the feature just to get the product out the door, and bolt it on to
code later (because THAT always works out well :) ), it really makes you
wonder how many more generations of engineers will be having these same

The money always talks. As long as solutions exist to massage V4 scarcity ,
and those solutions remain cheaper, they will generally win.

On Thu, Feb 11, 2021 at 5:07 PM Mark Andrews <marka at> wrote:

> > On 12 Feb 2021, at 08:11, Jim Shankland <nanog at> wrote:
> >
> > On 2/11/21 6:29 AM, Owen DeLong wrote:
> >>
> >>> On Feb 11, 2021, at 05:55 , Izaac <izaac at> wrote:
> >>>
> >>> On Wed, Feb 10, 2021 at 04:04:43AM -0800, Owen DeLong wrote:
> >>>> without creating partitioned networks.
> >>> Ridiculous.  Why would you establish such a criteria?  The defining
> >>> characteristic of rfc1918 networks is that they are partitioned.
> >>>
> >>> The ability to recognize and exploit partitions within a network,
> >>> natural or otherwise, is the measure of competence in a network
> >>> engineer.
> >>>
> >>> Stop making excuses.
> >> Ridiculous… TCP/IP was designed to be a peer to peer system where each
> endpoint was uniquely
> >> addressable whether reachable by policy or not.
> >>
> >> IPv6 restores that ability and RFC-1918 is a bandaid for an obsolete
> protocol.
> >>
> >> Stop making excuses and let’s fix the network.
> >>
> >> Owen
> >
> > TCP/IP wasn't designed; it evolved (OK, a slight exaggeration). The
> ISO-OSI protocol stack was designed. Many years ago, I taught a course on
> TCP/IP networking. The course was written by someone else, I was just being
> paid to present/teach it. Anyway, I vividly remember a slide with bullet
> points explaining why TCP/IP was a transitional technology, and would be
> rapidly phased out, replaced by the "standard", intelligently designed
> ISO-OSI stack. By the time I taught the course, I had to tell the class
> that every single statement on that slide was incorrect. In the end,
> evolution beat out intelligent design, by a country mile.
> >
> > It was probably a couple of years later -- the year definitely started
> with a 1 -- that I first heard that IPv4 was being phased out, to be
> replaced over the next couple of years by IPv6. We've been hearing it ever
> since.
> >
> > That doesn't mean that we'll be living with IPv4 forever. A peer to peer
> system where each endpoint is uniquely addressable is desirable. But in a
> world of virtual machines, load balancers, etc., the binding of an IP
> address to a particular, physical piece of hardware has long since become
> tenuous. IPv4 is evolving into a 48-bit address space for endpoints (32-bit
> host + 16-bit port). That development has extended IPv4's useful life by
> many years.
> >
> > There is pain associated with continuing to make IPv4 work. And there is
> pain associated with transitioning to IPv6. IPv6 will be adopted when the
> pain of the former path is much larger than the pain of the latter path.
> Saying "RFC-1918 is a bandaid for an obsolete protocol" is using a
> normative, rather than empirical, definition of "obsolete". In the
> empirical sense, things are obsolete when people stop using them. Tine will
> tell when that happens.
> >
> > Jim Shankland
> For most networks there is almost no pain in enabling IPv6. Its
> reconfigure the routers to announce IPv6 prefixes and you are done.  We are
> 20+ years into IPv6 deployment.  Almost everything you buy today works with
> IPv6.  Even the crappy $50 home router does IPv6.  100s of millions of
> household networks have had IPv6 enabled without the owners of those
> networks needing to anything other than perhaps swap out a IPv4-only router
> to one that supports IPv6.  Hell lots of those home networks are behind
> IPv6-only uplinks with the CPE router translating the legacy IPv4 to IPv6
> for transport over the IPv6-only uplink.  The same happens with mobile
> phones these days.  If you have a phone that was purchased in the last 10
> years, give or take, you will most probably be talking to the world over a
> IPv6-only link.  Even Telstra here in Australia is transition their network
> to IPv6-only, the network in South Australia is IPv6-only with the other
> states to come.  Optus here has been shipping IPv6 capable routers for the
> last several years with every new install / replacement.  Optus haven’t yet
> enabled IPv6 to the home but the installed base is becoming IPv6 capable.
> The harder part is making sure every piece of kit works with IPv6 when you
> want to turn off IPv4 internally but even then you can put that equipment
> behind bi-directional NAT-64 boxes.
> You have large parts of the world actively turning off as much IPv4 as
> they can.  Connections to legacy IPv4-only services are being tunnelled
> over IPv6 either by encapsulation or bi-directional protocol translation.
> --
> Mark Andrews, ISC
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> PHONE: +61 2 9871 4742              INTERNET: marka at
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