RIRs give out unique addresses (Was: something has a /8! ...)

Owen DeLong owen at delong.com
Fri Sep 28 02:32:17 UTC 2012

I believe that this section of NRPM says no.

4.3.5. Non-connected Networks

End-users not currently connected to an ISP and/or not planning to be connected to the Internet are encouraged to use private IP address numbers reserved for non-connected networks (see RFC 1918). When private, non-connected networks require interconnectivity and the private IP address numbers are ineffective, globally unique addresses may be requested and used to provide this interconnectivity.


On Sep 20, 2012, at 7:56 AM, "Naslund, Steve" <SNaslund at medline.com> wrote:

> I suppose that ARIN would say that they do not guarantee routability
> because they do not have operational control of Internet routers.
> However, Wouldn't you say that there is a very real expectation that
> when you request address space through ARIN or RIPE that it would be
> routable?  I would think that what ARIN and RIPE are really saying is
> that they issue unique addresses and you need to get your service
> provider to route them. FWIW, the discussion of the military having
> addresses pulled back is pretty much a non-starter unless they want to
> give them back.  When the management of IP address space was moved from
> the US DoD, there were memorandums of understanding that the military
> controlled their assigned address space and nothing would change that.
> I know this for a fact because I was around this discussion in the US
> Air Force.
> Steven Naslund
> -----Original Message-----
> From: John Curran [mailto:jcurran at arin.net] 
> Sent: Thursday, September 20, 2012 9:40 AM
> To: Jeroen Massar
> Cc: NANOG list
> Subject: Re: RIRs give out unique addresses (Was: something has a /8!
> ...)
> On Sep 20, 2012, at 10:10 AM, Jeroen Massar <jeroen at unfix.org>
> wrote:
>> On 2012-09-20 16:01 , John Curran wrote:
>>> It's very clear in the ARIN region as well.  From the ARIN Number 
>>> Resource Policy Manual (NRPM), 
>>> <https://www.arin.net/policy/nrpm.html#four11> -
>>> "4.1. General Principles 4.1.1. Routability Provider independent
>>> (portable) addresses issued directly from ARIN or other Regional 
>>> Registries are not guaranteed to be globally routable."
>> While close, that is not the same.
>> The RIPE variant solely guarantees uniqueness of the addresses.
>> The ARIN variant states "we don't guarantee that you can route it 
>> everywhere", which is on top of the uniqueness portion.
> Agreed - I called it out because ARIN, like RIPE, does not assert that
> the address blocks issued are "publicly routable address space" 
> (i.e. which was Tim Franklin's original statement, but he did not have
> on hand the comparable ARIN reference for that point.)
> FYI,
> /John

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