[arin-ppml] Draft Policy ARIN-2021-3: Private AS Number and Unique Routing Policy Clarifications

Andrew Dul andrew.dul at quark.net
Wed Jul 21 22:40:03 EDT 2021


In a 32-bit ASN world..in cases where one might choose to use a 
private-asn, such as being multi-homed to the same provider, if an 
organization wants to use a public ASN we shouldn't discourage that 
through policy, as it also allows an organization to easily become BGP 
multihomed in the future.

Andrew

On 7/21/2021 5:11 PM, Martin Hannigan wrote:
>
> I’m not endorsing anything, but the remarks that Chris regarding the 
> content he commented on were good observations that are typical of our 
> lack of writing standards for the NRPM. I could see budget being spent 
> on improving that.
>
> Andrew: How does a public 32 bit ASN reduce the need to use a private ASN?
>
> Warm regards,
>
> -M<
>
>
> On Wed, Jul 21, 2021 at 4:38 PM Andrew Dul <andrew.dul at quark.net 
> <mailto:andrew.dul at quark.net>> wrote:
>
>     Based upon the input we have received from ARIN staff it seems that
>     additional clarity is desired in section 5 for ASN assignments.
>
>     I am not convinced however that the current draft text is the best
>     way
>     to fix the issues raised so far.  I don't have specific test
>     suggestions
>     at this point but believe we should discuss how the text should be
>     improved in light of how ASNs are now being used by various cloud
>     providers and the fact that ASNs are now 32-bits in length which
>     in many
>     cases reduces the need to use private AS numbers.
>
>     Andrew
>
>     On 7/20/2021 5:23 PM, Chris Woodfield wrote:
>     > Speaking in support, but I’d like to recommend an adjustment in
>     the proposal text. I think the phrase “unique routing policy, such
>     as BGP” is technically incorrect; BGP is a protocol, not a policy.
>     BGP is how a network *communicates* the relevant aspects of its
>     unique routing policy to its peers, but is not the policy in and
>     of itself.
>     >
>     > As such, where the proposal text says “unique routing policy,
>     such as BGP”, I think this should read “unique routing policy,
>     implemented via BGP” - that should fix the bug here.
>     >
>     > Hope this helps,
>     >
>     > -C
>     >
>     >> On Jul 20, 2021, at 12:52 PM, ARIN <info at arin.net
>     <mailto:info at arin.net>> wrote:
>     >>
>     >> On 15 July 2021, the ARIN Advisory Council (AC) accepted
>     "ARIN-prop-298: Private AS Number and Unique Routing Policy
>     Clarifications" as a Draft Policy.
>     >>
>     >> Draft Policy ARIN-2021-3 is below and can be found at:
>     >>
>     >> https://www.arin.net/participate/policy/drafts/2021_3/
>     <https://www.arin.net/participate/policy/drafts/2021_3/>
>     >>
>     >> You are encouraged to discuss all Draft Policies on PPML. The
>     AC will evaluate the discussion in order to assess the conformance
>     of this draft policy with ARIN's Principles of Internet number
>     resource policy as stated in the Policy Development Process (PDP).
>     Specifically, these principles are:
>     >>
>     >> * Enabling Fair and Impartial Number Resource Administration
>     >> * Technically Sound
>     >> * Supported by the Community
>     >>
>     >> The PDP can be found at:
>     >> https://www.arin.net/participate/policy/pdp/
>     <https://www.arin.net/participate/policy/pdp/>
>     >>
>     >> Draft Policies and Proposals under discussion can be found at:
>     >> https://www.arin.net/participate/policy/drafts/
>     <https://www.arin.net/participate/policy/drafts/>
>     >>
>     >> Regards,
>     >>
>     >> Sean Hopkins
>     >> Senior Policy Analyst
>     >> American Registry for Internet Numbers (ARIN)
>     >>
>     >>
>     >>
>     >> Draft Policy ARIN-2021-3: Private AS Number and Unique Routing
>     Policy Clarifications
>     >>
>     >> Problem Statement:
>     >>
>     >> At ARIN 47, staff identified three points of potential
>     confusion with current text in NRPM Section 5: AS Numbers.
>     >>
>     >> 1. “Sites that do not require a unique AS Number should use one
>     or more of the AS Numbers reserved for private use.” Some
>     customers are not aware that their need for a unique AS Number
>     depends upon their need (or lack thereof) to utilize the AS Number
>     on the public Internet.
>     >>
>     >> 2. “In order to be assigned an AS Number, each requesting
>     organization must provide ARIN with verification that it has one
>     of the following…A unique routing policy (its policy differs from
>     its border gateway peers)…A multihomed site.” Few customers
>     qualify for an AS Number under the “unique routing policy”
>     requirement, specifically because they aren’t aware of what
>     “unique routing policy” applies to.
>     >>
>     >> 3. “AS Numbers are issued based on current need. An
>     organization should request an AS Number only when it is already
>     multihomed or will immediately become multihomed.” All ARIN
>     delegations are based on current needs, and some customers aren’t
>     aware they need network plans when they request an AS Number.
>     Additionally, clarification that some organizations may have a
>     unique need for an AS Number outside of utilizing a unique routing
>     policy, such as BGP.
>     >>
>     >> Policy statement:
>     >>
>     >> In Section 5 -
>     >>
>     >> Replace
>     >>
>     >> “Sites that do not require a unique AS Number should use one or
>     more of the AS Numbers reserved for private use.”
>     >>
>     >> with
>     >>
>     >> “Private ASNs should be used only when there is no plan to use
>     them on the public Internet.”
>     >>
>     >> Replace
>     >>
>     >> “1. A unique routing policy (its policy differs from its border
>     gateway peers) 2. A multihomed site.”
>     >>
>     >> with
>     >>
>     >> “1. A plan to connect their network using a unique routing
>     policy, such as Border Gateway Protocol (BGP) 2. A network
>     requiring routing policies to be deployed which are unique only to
>     that network”
>     >>
>     >> Replace
>     >>
>     >> “AS Numbers are issued based on current need. An organization
>     should request an AS Number only when it is already multihomed or
>     will immediately become multihomed.”
>     >>
>     >> with
>     >>
>     >> “AS Numbers should be requested when an organization has
>     network plans ready and is either planning to use a unique routing
>     policy (such as BGP) or has a unique need for an AS Number.”
>     >>
>     >> Timetable for implementation: Immediate
>     >>
>     >>
>     >>
>     >> _______________________________________________
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