[arin-ppml] Origin AS Semantics

Christopher E. Altland caltland at mctvohio.com
Fri Feb 23 10:02:14 EST 2018


I agree with this.

Christopher Altland

From: ARIN-PPML [mailto:arin-ppml-bounces at arin.net] On Behalf Of David Farmer
Sent: Thursday, February 22, 2018 7:12 PM
To: ARIN-PPML List
Subject: [arin-ppml] Origin AS Semantics

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

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/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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