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Re: [Sidrops] ASPA verification questions

Job Snijders <job@fastly.com> Wed, 14 December 2022 16:11 UTC

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From: Job Snijders <job@fastly.com>
Date: Wed, 14 Dec 2022 20:11:03 +0400
Message-ID: <CAMFGGcAtrmku2FeSa6WJxt1Su6O8ogRWHJnSLEMZqdx6_=14PA@mail.gmail.com>
To: Claudio Jeker <cjeker@diehard.n-r-g.com>
Cc: sidrops@ietf.org
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Subject: Re: [Sidrops] ASPA verification questions
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Hi all,

To add context: “roles” in Claudio’s message refers to BGP OPEN roles (
https://www.rfc-editor.org/rfc/rfc9234.html)

It might be good to specify dependencies on RFC9234 (if there are any?).

Kind regards,

Job

On Wed, 14 Dec 2022 at 18:47, Claudio Jeker <cjeker@diehard.n-r-g.com>
wrote:

> Hi all,
>
> I'm working on ASPA verification in OpenBGPD and while I have the basic
> validation algorithm working I have a question that is not covered by
> draft-ietf-sidrops-aspa-verification-11:
>
> What should happen with ebgp peers that have no role assigned?
>
> The draft implements two algorithms (5.2 and 5.3) which are applied
> for different session types based on roles. The draft does not mention
> what should be set for ebgp sessions that have no role configured.
>
> OpenBGPD will return "unknown" for all aspa validation calls for such
> peers. So all their prefixes/paths are marked as ASAP "unknown".
> Only exception is an empty ASPATH. Empty ASPATHs from ebgp peers are
> always considered "invalid" (following section 5).
>
> --
> :wq Claudio
>
> _______________________________________________
> Sidrops mailing list
> Sidrops@ietf.org
> https://www.ietf.org/mailman/listinfo/sidrops
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