[arin-ppml] Origin AS Semantics

Owen DeLong owen at delong.com
Thu Feb 22 20:57:28 EST 2018

Seems pretty explicit to me.

“…list of the Ages that the user permits to originate address prefixes within the address block.”

So far, I’ve been unable to imagine any interpretation of “within the address block” which would exclude more specifics.


> On Feb 22, 2018, at 4:11 PM, David Farmer <farmer at umn.edu> wrote:
> An interesting question came up on Tuesday in the ARIN IRR Roadmap at NANOG.  Essentially, what is the intended semantics of Origin AS? See timestamp 20:14 to 21:04 in the following video;
> https://youtu.be/tsWq_LgNS5s <https://youtu.be/tsWq_LgNS5s>
> Some background; Section 3.5 of the NRPM, originally Policy ARIN-2006-3, specifies the creation of what is now the "Origin AS" field in ARIN's registry, see;
> https://www.arin.net/policy/nrpm.html#three5 <https://www.arin.net/policy/nrpm.html#three5>
> https://www.arin.net/policy/proposals/2006_3.html <https://www.arin.net/policy/proposals/2006_3.html>
> So back to the question; "are you allow to announce any more specifics based on the Origin AS?"
> Note the last sentence of section 3.5.1 says the following;
> This additional field will be used to record a list of the ASes that the user permits to originate address prefixes within the address block.
> While the policy doesn't formally specify the semantics for this field, based on the above sentence, I personally have to conclude that the policy intends that more specifics should be permitted based on the "Origin AS" filed.
> Does anyone read this differently?
> Do we need to further clarify this in the policy?
> Thanks.
> -- 
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> David Farmer               Email:farmer at umn.edu <mailto:Email%3Afarmer at umn.edu>
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