6lowpan WG -- IETF 78, Maastricht, Netherlands
Monday, July 26, 0900 - 1130
London Room
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Agenda:
  Introduction and Administrivia - Chairs
  Header Compression - J Hui
  Neighbor Discovery - Z. Shelby
  BB Router - P. Thubert
  RA Suppression - L. Toutain
  HIP - R. Moskowitz
  Lightweight Routing - Y. Qiu
  TCP Header Compression - L. Toutain
  6lowpan mobility - C. Williams
  Fragment Recovery - P. Thubert
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Meeting Discussion:
-- Introduction
	Carsten covered the agenda as well as an overview of the WG milestones
        HC draft has been through LC - possibly one more LC
        Security Analysis - languishing
        Architecture - no work being done
        Routing Requirements - ISEG review
        ND Optimization - LC
        Use Cases - LC

-- HC Draft
	Jonathan Hui presented the current status of the 6lowpan HC draft
	draft-ietf-6lowpan-hc-07.
        Added text to deal with compressed headers when using 4944 fragmentation
        Added text on mapping between link-layer addresses and IIDs.
        Proposed change to deal with IP-in-IP.
        Will update draft and one final LC

-- Other header compression for 6lowpan
        There have been a couple of drafts on how to compress other
        protocols such as ICMP, TCP and a generic header compression.
        Will continue to discuss on list.  Will not impact HC draft.

-- ND Draft
   Draft-ietf-6lowpan-nd-11
        Since Anaheim:
          new registration using NS/NA
          clarifications and integrated feedback from Zigbee interop
        Basically use 4861 mechanisms optimized for host-router interface
        Address registration using NS/NA
        Optional DAD
        Optional multi-hop prefix and context dissemination
        ND-12 will be published this week.
        Plan to LC ND-12

-- BB Draft
   draft-thubert-6lowpan-backbone-router-02
        This was work that was started in previous ND draft and was split
        from the draft.
        Added registration from RPL
        Presented what is a Backbone Router and it use and functions.
        Much discussion surrounding the benefits of this approach and
        its scaling.  Concerns raised about this approach.
        Suggestions to author to determine scaling and advisibility.
        Appears further work required by author before making this a
        working group item

-- RA Suppression
   draft-toutain-6lowpan-ra-suppression-01.txt
        Why? ND is still to complex for lowpans and consume energy
        How? Define an implicit prefix.
        Discussion that you could do this today with nd draft.
        Didn't seem necessary.
        No consensus in room to move forward with this draft.

-- HIP DEX for 802.15.4 key management
        Robert explained what HIP was and how HIP DEX was different than
        HIP BEX.  Simplified (on a diet).
        HIP DEX would provide a mechanism for key managment for 
        lowpans.
        Uses ECDH.
        No HASH and no digital signatures
        No PFS

-- Secure Router
  Skipped due to time constraints

-- TCP/HC
  Skipped due to time constraints

-- Simple Fragment Recovery
   draft-thubert-6lowpan-simple-fragment-recovery-07
        Pascal presented his draft on fragment recovery.
        Why? 6lowpan packets could be large and the loss
        of a fragment would cause the entire large packet to 
        be retransmitted.
        How? 32 bit ACK bitmap, congestion control, control multipath
        Much discussion about the usefullness or necessity.
        More work requested of author.
        No consensus to move forward with draft as WG document.