Re: [mpls] Reference Augmented Forwarding - MPLS RAF

[Stewart Bryant <[e-mail]>]

Interesting idea, and I have also been wondering for a number of reasons whether we were straying too far from the standard call by reference model that underpins MPLS.

However, if we define a new FEC we do not need an SPL, and save space in the stack since the delivery label is the “SPL” for the network action label.

The two reasons I am worried about SPLs is firstly loss of generality in a protocol that has peen served so well by the use of opaque identifiers, and the resultant damage to the MPLS data plane security model that the move from opaque to public identifiers introduces. 

Stewart

Sent from my iPad

> On 25 Apr 2022, at 21:34, Robert Raszuk <[e-mail]> wrote:
> 
> 
> Dear WG,
> 
> As we have discussed on the list I am posting a description of an alternative architectural approach on how MPLS data plane can be enhanced/extended to support execution of arbitrary network actions as well as support network programming with minimal extensions to label stack encoding. 
> 
> Comments, questions and contributions all very welcome. 
> 
> Kind regards,
> Robert
> 
> ---------- Forwarded message ---------
> From: <[e-mail]>
> Date: Mon, Apr 25, 2022 at 10:27 PM
> Subject: New Version Notification for draft-raszuk-mpls-raf-fwk-00.txt
> To: Robert Raszuk <[e-mail]>
> 
> A new version of I-D, draft-raszuk-mpls-raf-fwk-00.txt
> has been successfully submitted by Robert Raszuk and posted to the
> IETF repository.
> 
> Name:           draft-raszuk-mpls-raf-fwk
> Revision:       00
> Title:          Framework of MPLS Reference Augmented Forwarding
> Document date:  2022-04-25
> Group:          Individual Submission
> Pages:          8
> URL:            https://www.ietf.org/archive/id/draft-raszuk-mpls-raf-fwk-00.txt
> Status:         https://datatracker.ietf.org/doc/draft-raszuk-mpls-raf-fwk/
> Htmlized:       https://datatracker.ietf.org/doc/html/draft-raszuk-mpls-raf-fwk
> 
> Abstract:
>    This document specifies an architectural framework for enabling MPLS
>    based forwarding with optional reference based packet processing in
>    transit network elements.
> 
> The IETF Secretariat