Re: [mpls] Consensus poll on Design directive for the MPLS Open DT
Loa Andersson <loa@pi.nu> Fri, 03 September 2021 08:47 UTC
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To: Kireeti Kompella <kireeti.ietf@gmail.com>
Cc: "mpls@ietf.org" <mpls@ietf.org>, "pals-chairs@ietf.org" <pals-chairs@ietf.org>, "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>, DetNet Chairs <detnet-chairs@ietf.org>
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From: Loa Andersson <loa@pi.nu>
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Date: Fri, 03 Sep 2021 10:47:40 +0200
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Subject: Re: [mpls] Consensus poll on Design directive for the MPLS Open DT
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Kireeti, In the MIAD wiki page you talk about ancillary data, I think we should tweak a little bit: ------------------ from wiki ---------------------------- OLD MIAD consists of indicators and ancillary data. The ancillary data can be: 1. implicit ("no-data"); 2. within the label stack, encoded as labels ("in-stack data" or ISD); 3. after the BoS ("post-stack data" or PSD) of this label stack; 4. within the payload (not considered further here). --------------------- proposed changes -------------------- NEW MIAD consists of indicators and ancillary data. The ancillary data can be: 1. implicit ("no-data" or ND (alternatively NoD)); 2. within the label stack, encoded as labels ("in-stack data" or ISD); 3. after the BoS ("post-stack data" or PSD) of this label stack; within the payload (not considered further here). ALTERNATIVE NEW MIAD consists of indicators and ancillary data. The ancillary data can be: 1. implicit ("no-data" or ND (alternatively NoD)); 2. within the label stack, encoded as labels ("in-stack data" or ISD); 3. after the BoS ("post-stack data" or PSD) of this label stack; 4. followed the payload (not considered further here). I prefer "NEW" and NoD. /Loa On 25/08/2021 00:54, Kireeti Kompella wrote: > Hi Loa, > > I have reorganized the OpenDT wiki page, added a page for MIAD and added > this text below (as provisional). > > I suggest using the terms “in-stack data” (ISD) and “post-stack data” > (PSD) for in-stack and after BoS MIAD, respectively. > > Kireeti. > >> On Aug 24, 2021, at 01:35, Loa Andersson <loa@pi.nu >> <mailto:loa@pi.nu>> wrote: >> >> Working Group, Design Tean, >> >> The Open DT has discussed the relationship between GAL/G-ACh and the >> new methods for indicating and transporting ancillary data in and >> after the label stack. >> >> We have decided to give the MPLS Open DT the following design directive: >> >> ---------------------------- start --------------------------------- >> >> Following the discussion in the MPLS Open DT 2021-08-19 we have have >> decided to give the MPLS Indicator and Open Design team this design >> directive. >> >> RFC 5586 "MPLS Generic Associated Channel" (including the updates by >> RFC 7274, RFC 6423, RFC 7214, and RFC 7026) will not be changed by the >> MPLS Open Design Team. The associated channel (GAL/G-ACh) will >> continue to operate as specified. No changes should be made to the >> associated channel, without careful coordination with what will be >> specified by the MPLS Pen design team. >> >> The Open design team will continue define methods bases on indicators >> (e.g. FAI-style SPL) and ancillary data. >> >> A packet can not carry both the associated channel and the new methods >> for transporting ancillary data indicated by the FAI-style SPL, i.e. >> the GAL and the FAI-style SPL can not both be present in a label >> stack. The reason is that the way the ACH is specified there is a high >> risk of collision of "data after the BoS" specified by other methods. >> >> ---------------------end -------------------------------------------- >> >> The design team will start working according to this design directive, >> but for a period of two weeks we will comments on the directive. >> >> Please send comments to the MPLS wg mailing list (mpls@ietf.org >> <mailto:mpls@ietf.org>). >> >> /Loa >> >> for the co-chairs >> -- >> >> Loa Andersson email: loa@pi.nu <mailto:loa@pi.nu> >> Senior MPLS Expert loa.pi.nu@gmail.com <mailto:loa.pi.nu@gmail.com> >> Bronze Dragon Consulting phone: +46 739 81 21 64 >> >> _______________________________________________ >> mpls mailing list >> mpls@ietf.org <mailto:mpls@ietf.org> >> https://www.ietf.org/mailman/listinfo/mpls > -- Loa Andersson email: loa@pi.nu Senior MPLS Expert loa.pi.nu@gmail.com Bronze Dragon Consulting phone: +46 739 81 21 64
- [mpls] Consensus poll on Design directive for the… Loa Andersson
- Re: [mpls] Consensus poll on Design directive for… Haoyu Song
- Re: [mpls] Consensus poll on Design directive for… gregory.mirsky
- Re: [mpls] Consensus poll on Design directive for… Kireeti Kompella
- Re: [mpls] Consensus poll on Design directive for… Loa Andersson
- Re: [mpls] Consensus poll on Design directive for… Loa Andersson