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[Idr] Re: Extended - WG LC on draft-ietf-idr-rfc4360-bis-02 (03/02/2026 - 03/30/2026)

"Scudder, John" <john.scudder@hpe.com> Thu, 16 April 2026 18:57 UTC

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From: "Scudder, John" <john.scudder@hpe.com>
To: Robert Raszuk <robert@raszuk.net>, Jeffrey Haas <jhaas@pfrc.org>
Thread-Topic: [Idr] Extended - WG LC on draft-ietf-idr-rfc4360-bis-02 (03/02/2026 - 03/30/2026)
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Date: Thu, 16 Apr 2026 18:56:31 +0000
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Subject: [Idr] Re: Extended - WG LC on draft-ietf-idr-rfc4360-bis-02 (03/02/2026 - 03/30/2026)
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> On Apr 16, 2026, at 10:16 AM, Robert Raszuk <robert@raszuk.net> wrote:
> OK I see your intention was to enumerate what actions could be overwritten by local cfg ... 
>>   Non-transitive extended communities MUST NOT be originated or propagated across an Autonomous System boundary unless explicitly configured to do so. Non-transitive extended communities SHOULD NOT be removed when advertising the route within the same BGP AS Confederation (*as defined in <xref target="RFC5065"/>).
> How about this: 
> 
> Non-transitive extended communities MUST NOT be sent across an Autonomous System boundary unless explicit configuration permits to originate or propagate them to an EBGP peer. Non-transitive extended communities SHOULD NOT be removed when advertising the route within the same BGP AS Confederation (*as defined in <xref target="RFC5065"/>).

FWIW that looks reasonable to me, and is close to what I might have proposed. I might suggest a slightly different form, like,

Non-transitive extended communities MUST NOT be sent (originated or propagated) across an Autonomous System boundary unless explicitly permitted by configuration. Non-transitive extended communities SHOULD NOT be removed when advertising the route within the same BGP AS Confederation (*as defined in <xref target="RFC5065"/>).

—John

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