minutes: UDLR WG - 51st IETF

[Emmanuel Duros <Emmanuel.Duros@UDcast.com>]

Please, find here the minutes of the UDLR WG at the 51st IETF meeting in
London.

The presentations will be available on-line as soon as I have all of
them.

Emmanuel Duros
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AGENDA:

Agenda bashing                                        5 min

New charter					      5 min

UDLR general presentation - Emmanuel Duros (UDcast)  15 min

DVMRP over UDLR - Yann Guinamand (Alcatel)           15 min

PPPoE over UDLR - Virginie Faineant (France Telecom) 15 min

IPv6 over UDLR (WIDE) - Hidetaka Izumiyama (JSAT)    15 min

Approach for scalable multicast (HITACHI-IT) -
                       Hidetaka Izumiyama (JSAT)     15 min

Identifying security holes - Emmanuel Duros (UDcast) 10 min

Open issues / Discussions
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Minutes:

* Agenda Bashing: Emmanuel Duros (UDcast)


* New Charter: Walid Dabbous (Inria)
  Walid informs the group that two new co-chairs are
  candidate: Emmanuel Duros and Hidetaka Izumiyama
  No comments from the group

* UDLR Presentation: Emmanuel Duros (UDcast)
  
  General presentation on UDLR: history of the WG, description the
Link-Layer Tunneling mechanism (LLTM) [rfc 3077], network 
topologies/hardware which benefit of this mechanism, open issues


* Configuration of DVMRP over LLTM: Yann Guinamand (Alcatel Space)
  
  Presentation and characteristics of a satellite network topology 
using LLTM. Configuration of dynamic Multicast routing (DVMRP) on
a feed and receivers
  - Question by Walid Dabbous: will you be moving from DVMRP to
  another protocol ?
  - Answer: yes, we are starting to consider PIM-DM


* PPPoE over LLTM: Valerie Faineant (FT R&D)

  Presentation of a satellite network using LLTM. Interest in using 
the same techno used to deploy ADSL services in a satellite 
environment. PPPoE works fine over LLTM. Easy to provide satellite 
connectivity re-using known protocols and administration tools.


* IPv6 over LLTM: Izu (JSAT)
 
  Presentation of an IPv6 satellite network connecting remote IPv6 
network.

  - Question Walid Dabbous: is the solution described already 
    deployed
  - Answer: yes, this is solution is currently used within the wide
    project
  - Question ???: what about the quality of video/voice due to the
    narrow bandwidth of the return channel?
  - Answer Izu: The receivers send back text or low bandwidth voice
  - Answer Emmanuel: This is common practice, there is now problem
    to return voice with GSM quality on a 64Kbps link
  - Question: The solution described brings IPv6 connectivity to 
    IPv4 only domains, is it possible to do the opposite ?
  - Answer: Yes, there is no problem to do so with UDLR.


* Experiment of scalable multicast: Izu (for Hitachi)
  deployment of a satellite network using LLTM. Use of IGMP proxy
protocol in order to provide dynamic multicast routing over remote
sites. Use of exponential timers to provide scalable routing.
 

* Security holes: Emmanuel Duros

  Identify a list of security holes within the LLTM: HELLO msg
(sensitive information), stateless tunneling (authentication), and
routing protocols (authentication).


The group agrees to produce informational RFCs:

Yann Guinamand: configuration of DVMRP over a UDL
Valerie Faineant: Use of PPPoE over UDLR
Izu: IPv6
Emmanuel Duros: Identifying security holes

Comment from Jun Murai:
terrestrial bandwidth is increasing, and satellite bandwidth is rather
stable around 40Mbps. Is the group going to think about the potential
bottlenecks regarding the difference of bandwidth between the two
medias ?

There was an off-line discussion between Abha Ahuja, Rob Coltun and
Emmanuel Duros: This question is related to a more general problem and
is out of scope of the WG.

-- 
Emmanuel Duros                  http://www.udcast.com
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