Minutes IETF104: dmm
minutes-104-dmm-00

IETF104 DMM WG meeting
Date:  March 26th, 2019
Time:  9:00-11:00, Tuesday Morning session I
Location: Hilton Prague
Chairs: Sri Gundavelli (Cisco) and Dapeng Liu (Alibaba)
Minutes Taker: Miya Kohno
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1. WG organization & milestones - Sri Gundavelli (Cisco)
[Slides]
https://datatracker.ietf.org/meeting/104/materials/slides-104-dmm-dmm-working-group-status-00.pdf
  - draft-ietf-dmm-ondemand-mobility-15 : in IESG review
  - draft-ietf-dmm-distributed-moblity-anchoring-11 : Chair review pending,
  will move to LC after IETF104 - draft-ietf-dmm-pmipv6-dlif-03 : Chair review
  pending, IPR declarations posted and need to understand the implication
    (Carlos) The reason for update was trivial. Just a decoration of individual
    ID. (Sri) In general, IPR declaration should be after some process. But
    thanks for the clarification.
  - draft-ietf-dmm-srv6-mobile-uplane-04 : Need to understand the 6man
  discussion on this spec, Plan for last call readiness
    (Suresh) No issues are seen. The second session of 6man will be held on
    Friday to close all issues. Anyway, it does not impact to this doc. (Sri)
    Thanks for the clarification.
 - draft-ietf-dmm-fpc-cpdp-12 : Expired draft, not much activities seen
 - draft-ieef-dmm-5g-uplane-analysis-01 : new version posted recently, need
 some more review

2. Control/Data Plane for N6 Traffic Steering - Marco Liebsch (NEC)
[Slides]
https://datatracker.ietf.org/meeting/104/materials/slides-104-dmm-control-data-plane-for-n6-traffic-steering-00
- Background and Motivation - Use Cases and Problem Statement - Scope of the
draft : Operation, Semantics and Data models for DPN traffic policies,
Architecture - 2 possible approaches : Loosely coupled or Tightly coupled -
Next step - Target clean update by June 2019
    (Tom Herbert) What about latency?
    (Marco) There is no single answer
    (? Nokia) It’s a question of deployment design
    (? Huawei) SRv6 is mentioned, Is there any specific reason?
    (Marco) SRv6 is a good candidate for traffic steering, but it should not
    depend on any particular protocol (Charlie Perkins) Liaison? (Marco) 3GPP,
    ETSI MEC (?) Edge computing needs N3, not only N6? (Marco) Yes, if
    interfering with GTP (Miya Kohno) Is there any correlation with Network
    Slicing? (Marco) It is complementary (Miya) Complementary, or we can
    converge (Charlie) No protocol elements are needed? (Marco) Primarily
    information models only

3. FPC update – Charlie Perkins
[Slides]
https://datatracker.ietf.org/meeting/104/materials/slides-104-dmm-protocol-for-forwarding-policy-configuration-fpc-00
 - No changes since IETF 102
 - Possibility to split into two drafts in order to promote readability
    (Suresh) Two drafts should be easier to be get reviewed, but not good for
    model consistency. Consult chairs. (Charlie) Good suggestion (Sri) So when
    will it be updated? (Charlie) Today

4. SRv6 for Mobile User Plane – Satoru Matsushima (Softbank)
[Slides]
https://datatracker.ietf.org/meeting/104/materials/slides-104-dmm-srv6-for-mobile-user-plane-00
- Summary of updates from v03 to v04 - Feedback from Hackathon : The codes are
now open-sourced (VPP and P4) - Next Steps
    (Sri) Open Source is great! Please send it to the ML
    (Robin) Hackathon is interesting. Do you contribute to fd.io?
    (Satoru) Yes, interested in contributing to the VPP community. Not sure if
    they accept, though. (Eric Klein) It was IPv4. Is IPv6 capable? (Satoru)
    you mean GTP over IPv6? (Eric) yes (Satoru) yes, it’s already defined in
    the draft. End.M.GTP6.E. The trick is to use 2 SIDs.

5. Scalable De-aggregation for Distributed Mobility Management – Fred Templin
(ACM) [Slides]
https://datatracker.ietf.org/meeting/104/materials/slides-104-dmm-scalable-de-aggregation-for-dmm-00
 - Scaling Consideration for Aviation
 - Massively Distributed Mobility Management
    (Tom Herbert) “Massive” is relative
    (Fred) Yes, 1 billion mobiles, 1000 BGP peers, the limitation would be
    #peerings (Sri) Hierarchical aggregation – local containment to avoid BGP
    churn (Charlie) Similar to Fast Mobile IP? (Fred) Network layer is BGP level

6. User Plane Protocol and Architectural Analysis on 3GPP 5G System – Shunsuke
Homma (NTT)
 [Slides]
 https://datatracker.ietf.org/meeting/104/materials/slides-104-dmm-user-plane-protocol-and-architectural-analysis-on-3gpp-5g-system-00
 - Background and History - Slicing with Network Instance – how to glue UPF and
 transport network
  (Suresh) What is the end goal? Success Criteria?
  (Satoru)  At least to bring analysis/clarification of 3GPP work to IETF
  (John) I think this is a very useful document

7. Distributed Mobility Anchoring - Carlos J. Bernardos
[Slides]
https://datatracker.ietf.org/meeting/104/materials/slides-104-dmm-distributed-mobility-anchoring-00
 - Waiting for Chairs review

8. Proxy Mobile IPv6 extensions for Distributed Mobility Management – Carlos J.
Bernardos [Slides]
https://datatracker.ietf.org/meeting/104/materials/slides-104-dmm-pmipv6-extensions-for-dmm-00
- Waiting for Chairs review

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