Minutes for DMM at IETF-95
minutes-95-dmm-1

IETF#95 DMM WG meeting.

Chairs:
	Jouni korhonen
	Dapeng Liu
	
Notes taker:
	Charlie Perkins


10:00    Title: Administrivia & Intro, WG organization & milestones
        Presenter: Chairs
        Slides: https://www.ietf.org/proceedings/95/slides/slides-95-dmm-5.pdf

= MNIDs draft in next couple of weeks with text as suggested for the
  many types of identifiers

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10:15       Title: DMM Architectural Considerations & Deployment Models
        Presenter: Sri Gundavelli
        Draft: https://tools.ietf.org/html/
        Slides: https://www.ietf.org/proceedings/95/slides/slides-95-dmm-8.pdf

Discussion: Which functions can be virtualized [Converged Control Plane]?
    Answer: all of them, and each separately
Discussion: How to manage flows through feature chains?
    Answer: This draft has to do with the gateways, not the feature chains.
    Answer: If features are known, then appropriate gateway can be chosen.
Request for adoption after reviews.

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10:35       Title: Protocol for Forwarding Policy Configuration (FPC) in DMM
                   - update
        Presenter: Marco Liebsch
        Draft: https://tools.ietf.org/html/draft-ietf-dmm-fpc-cpdp-03
        Slides: https://www.ietf.org/proceedings/95/slides/slides-95-dmm-6.pdf

Support of two operational models
= Be declarative: unambiguous rules for data-plane treatment
= Be imperative: client interacts with agent controls setup of tunnels, QoS,...
= TD: Traffic descriptor
= Traffic treatment: encapsulation, IP+port rewriting, NSH, QoS
= ... other protocol operations
= Updated document expected within next month; should be ready for WGLC

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10:55       Title: Evolving FPCP
        Presenter: Satoru Matsushima
        Draft: N/A
        Slides: https://www.ietf.org/proceedings/95/slides/slides-95-dmm-4.pdf

= Must converge Model I and II
= Distinguish abstraction from concrete instances
= Worry that combining Model I and II might lose some important details
= Jouni: should figure this out in the task group meetings?
= Jouni: Who understands the issue? <answer -- not many people>
    --> call for better

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11:05       Title: On Demand Mobility Management - update
        Presenter: Danny Moses
        Draft: http://tools.ietf.org/html/draft-ietf-dmm-ondemand-mobility-02
        Slides: https://www.ietf.org/proceedings/95/slides/slides-95-dmm-2.pdf

= Enable applications to indicate their IP continuity needs
= Types of IP service, new error codes
= Fixed / Sustained / Nomadic
= Referenced by 3GPP SA2 activity for 5G (S2-161020 session continuity)
= Behcet: there are more open issues than covered in this draft
  == concerns about "SUSTAINED"
  == Jouni: this document does not describe what happens on the network
  == Jouni: need to have a way to suggest need for IP address continuity
= Marco: so far these characterizations are just for IP address continuity
= Suresh: The "nomadic" address should just be called "IP address"
= Charlie: What does the IPR cover?  <answer: do not know>
= Charlie: Term "IP address reachability" is misleading
= Charlie: Term "IP service" can be approved

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11:15       Title: DHCPv6 Extension for On Demand Mobility exposure - update
        Presenter: Danny Moses
        Draft: http://tools.ietf.org/html/draft-moses-dmm-dhcp-ondemand-mobility-02
        Slides: https://www.ietf.org/proceedings/95/slides/slides-95-dmm-3.pdf

= Discussion about IA_NA/IA_TA Option with a structure diagram
  == The IP Continuity Service Option comes after the Status Code Option
     under OPTION_IAADDR
= Want to have some more feedback; document has been on the list for a year
= Jouni: if there are going to be changes to the On-Demand document, we will
    have to wait a bit before going forward with this document
= Sri: Need to show the relationship with On-Demand document
= Danny: Not extending DHCPv6 to support multiple addresses
= J-C: Like the document; does it need to be flagged to the DHC group
= Suresh: There is RFC 7277 for how to write DHCP options, and this does
    not follow that document
= Question about whether topic is acceptable for WG:

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11:30       Title: Distributed Mobility Anchoring - update
        Presenter: Anthony Chan
        Draft: https://tools.ietf.org/html/draft-chan-dmm-distributed-mobility-anchoring-07
        Slides: https://www.ietf.org/proceedings/95/slides/slides-95-dmm-7.pdf

= May need to discuss about Nomadic address
= Jouni: this document is Informational.  Is there a plan for a protocol?
= Anthony: This document would lead to a follow-on document for that.
= Jouni: Any idea about how far away agreement is for this document?  How close?


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11:45       Title: 3GPP 5G and mobility - Discussion
        Presenter: Jouni korhonen
        Draft: N/A
        Slides: https://www.ietf.org/proceedings/95/slides/slides-95-dmm-0.pdf

= Question: Does 3GPP exhibit much interest in the [dmm] framework?
= Charlie: the downloadable slides do not have the arrows or functional blocks
    <answer: will provide powerpoint>
= Mikael Abrahamson: question about tunneling...  tunnel may be needed for legal intercept
= Jouni: not at the point of specifying tunneling...
= Sri: no explicit requirements from 3GPP, but they are borrowing many
    concepts defined here in IETF.  Maybe we should start publishing
    more documents to 3GPP.
= Jouni: to be effective it has to come from someone actually working in 3GPP
= Suresh: If 3GPP puts out a dependency list, we can work from that
= Danny: has colleagues who go to 3GPP.
    IETF is too slow in finalizing documents.
    It is our responsibility to drive these issues in 3GPP

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12:00       Title: Distributed Mobility Management Protocol for WiFi Users in Fixed Network - update
        Presenter: Behcet Sarikaya
        Draft: https://tools.ietf.org/html/draft-sarikaya-dmm-for-wifi-04
        Slides: https://www.ietf.org/proceedings/95/slides/slides-95-dmm-1.pdf

= Jouni: How many people have read the draft?  <answer: almost no one>
= Charlie: Can this system architecture be made to correspond to the [dmm]
    architecture proposals
= Mikael: Problems in performance with way netconf is invoked

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        ** MIP maintenance track **

12:10       Title: Virtual CPE Deployment Considerations - new
        Presenter: Byju Pularikkal
        Draft: https://tools.ietf.org/html/draft-pularikkal-virtual-cpe-00
        Slides: https://www.ietf.org/proceedings/95/slides/slides-95-dmm-9.pdf

= Danny: It's more than just a bridge.
= Operators view existing architecture as a huge cost compared to virtual.
= Jouni: extensions to FPC?
= Sri: if extensions are small, could prefer to extend the existing document
= Satoru: Do you prefer Model I or Model II
= Sri: Pushing control choices out in a single message
= Satoru: Model I would seem to be more appropriate?
= Danny: Is each packet routed to V-CPE?
= Sri: Not necessarily data, but just control
= Marco: separate document? or requirements?
= Sri: a standalone document is preferable, different use case...