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[Idr] Re: [Core] draft-haas-idr-bgp-attribute-escape-04 - WG Adoption call (6/2 to 6/16/2026).

Susan Hares <shares@ndzh.com> Fri, 05 June 2026 22:13 UTC

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From: Susan Hares <shares@ndzh.com>
To: Nat Kao <pyxislx@gmail.com>
Thread-Topic: [Idr] [Core] draft-haas-idr-bgp-attribute-escape-04 - WG Adoption call (6/2 to 6/16/2026).
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Date: Fri, 05 Jun 2026 22:12:43 +0000
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Subject: [Idr] Re: [Core] draft-haas-idr-bgp-attribute-escape-04 - WG Adoption call (6/2 to 6/16/2026).
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Nat:

That is a good suggestion.  What do you think Jeff?

Sue

From: Nat Kao <pyxislx@gmail.com>
Sent: Friday, June 5, 2026 3:04 PM
To: Susan Hares <shares@ndzh.com>
Cc: idr@ietf. org <idr@ietf.org>
Subject: Re: [Idr] [Core] draft-haas-idr-bgp-attribute-escape-04 - WG Adoption call (6/2 to 6/16/2026).

Hi, Sue.

I support the adoption of this document.
It helps operators a lot.
Would it be better to include an "Operational Considerations" section outlining some best practices for operators?
Many Thanks!
Nat

On Wed, Jun 3, 2026 at 7:23 AM Susan Hares <shares@ndzh.com<mailto:shares@ndzh.com>> wrote:
This begins a 2-week WG adoption call for draft-haas-idr-bgp-attribute-escape-04.txt (6/2/2026 to 6/16/2026).

The author should respond to this email with an IPR statement.

WG Members - please comment on this adoption, and in your comments mention “support or no support.

A few things from the abstract may be helpful in your reading of this draft:

1) This is an informational draft.
2) The focus is “optional transitive attributes” for BGP that “escape” inadvertently beyond intended scope
3) Jeff Haas feels this will help writers of new drafts correctly use these optional transitive attributes.

Cheerily, Sue Hares
(Shepherd)

-----------

Excerpts from Abstract text:

   A significant part of the success of [RFC4271] BGP is
   due to its ability to incrementally add new features to its Path
   Attributes when they are marked "optional transitive".
   Implementations that are ignorant of a feature for an unknown Path
   Attribute that are so marked will propagate BGP routes with such
   attributes.

   Unfortunately, this blind propagation of unknown Path Attributes may
   happen for features that are intended to be used in a limited scope.
   When such Path Attributes inadvertently are carried beyond that
   scope, it can lead to things such as unintended disclosure of
   sensitive information, or cause improper routing.  In their worst
   cases, such propagation may be for malformed Path Attributes and lead
   to BGP session resets or crashes.

   This document calls such inadvertent propagation of BGP Path
   Attributes, "attribute escape".  This document further describes some
   of the scenarios that leads to this behavior and makes
   recommendations on practices that may limit its impact.

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