Internet Info 1997 December/Internet_Info_CD-ROM_Walnut_Creek_December_1997.iso/ietf/ipatm/atm-minutes-93nov.txt

Text File | 1994-02-16 | 12KB | 283 lines

CURRENT_MEETING_REPORT_

Reported by Mark Laubach/Hewlett-Packard

Minutes of the IP Over Asynchronous Transfer Mode Working Group (ATM)



The Classical Internet-Draft

The ``Classical IP and ARP over ATM'' (henceforth called ``Classical'')
Internet-Draft Last Call closed on Monday, November 1.  All issues
raised during the Last Call process were dealt with and closed.  One
serious technical issue was raised by Dave Sincoskie regarding the ARP
table entry timeout and n*n InARP transmission characteristics.  A
paragraph change was presented and adopted by consensus at the Thursday
meeting.  The change is as follows:

Under section 8.5 ``ATMARP Table Aging,'' replace paragraph:



     Prior to aging (removing) an ATMARP table entry, all members
     MUST generate an InARP_REQUEST on any open virtual circuit (VC)
     associated with that entry.  If an InARP_REPLY is received,
     that table entry is updated and not deleted.  If there is no
     open VC associated with the table entry, the entry is deleted.



With the following two paragraphs:



     Prior to aging an ATMARP table entry, an ATMARP server MUST
     generate an InARP_REQUEST on any open VC associated with that
     entry.  If an InARP_REPLY is received, that table entry is
     updated and not deleted.  If there is no open VC associated
     with the table entry, the entry is deleted.
     When an ATMARP table entry ages, an ATMARP client MUST
     invalidate the table entry.  If there is no open VC associated
     with the invalidated entry, that entry is deleted.  In the case
     of an invalidated entry and an open VC, the ATMARP client must
     revalidate the entry prior to transmitting any non address
     resolution traffic on that VC. In the case of a PVC, the client
     validates the entry by transmitting an InARP_REQUEST and
     updating the entry on receipt of an InARP_REPLY. In the case of
     an SVC, the client validates the entry by transmitting an
     ARP_REQUEST to the ATMARP Server and updating the entry on
     receipt of an ARP_REPLY. If a VC with an associated invalidated
     ATMARP table entry is closed, that table entry is removed.


Dave Piscitello approved the change process; another Last Call is not
needed.  The Classical Internet-Draft is awaiting IESG ballot.



Routing over Large Clouds Working Group Introduction

Joel Halpern gave a presentation of the proposed charter of the Routing
Over Large Clouds Working Group (ROLC). Juha's NBMA ARP has been moved
into that working group.  Issues involved with ARPing beyond the LIS and
shortcut routing, et al.  for IP over ATM are now in ROLC.



The MTU Internet-Draft

Ran Atkinson presented his Internet-Draft, ``Default IP MTU for use over
ATM AAL5'' (henceforth called ``MTU''). There was much discussion over
the use of SDU negotiation.  Dan Grossman suggested that advantage
should be taken of whatever signaling support is available and make it
mandatory for SVC negotiations.  The working group needs to specify the
parameters of UNI 3.0 so that interoperable implementations exist.  The
issue was raised that a very clearly defined default case exists
(classical model) and it is necessary to have a clear plan of how
signaling is used, for what, and what the defaults are.

A discussion of the MTU path discovery requirement took place.  The
question of whether system requirements (IP systems) can be driven by
requiring it in IP over ATM was raised.  Ran feels that an on/off switch
is a implementation optimization; i.e., up to the implementor.  Others
feel that it is not the ATM Working Group's place to require it.  The
group reached the following recommendation:  use the default MTU size of
9180.  IP stations must implement MTU path discovery but are not
required to use it.  If they do use it, the MTU size may be adjusted,
etc.

Ran will be updating the document soon.  The MTU path discovery issue is
still being debated.



Framework Document

Bob Cole led a discussion of the framework document.  Joel Halpern led a
short presentation on TUNIC and TULIP. Discussion was plentiful on all
issues.  Bob will be seeking volunteers for help with a new version.
The working group chair hopes that this document can be turned into a
planning guide for the working group.  Discussions will continue on the
mailing list.



Security and Reliability

Bryan Lyles presented a brief introduction of security issues with
regards to IP over ATM, in that a firewall-level mechanism is needed
that allows certain streams to go through a firewall.  Also, as trends
will want to multiplex a VC higher in the protocol stack (e.g., TCP
ports, or higher) reliability of the VC must be understood.  A reliable
peer protocol cannot be replaced with an unreliable VC. These issues
were presented to the working group as a consideration of areas that
might be worked on in the future.



Wrap Up

The group hosted other discussions on source address, the non-optimal
behavior of InARP, selectors and multiple LIS's, application binding,
and Q.93B parameters.

There was not enough time to complete discussion on the issue of IP over
the ATM Forum's LAN Emulation specification.

Action items for the group are:


   o Ran and Bob each incorporate comments from the meeting into their
     respective documents.

   o Dan Grossman, Mike Goguen, and George Swallow are forming a small
     design team to generate an Informational document on how to use the
     UNI 3.0 for IP over ATM. Sufficient information will be presented
     to enable consistent implementations but not to duplicate ATM Forum
     specifications.

   o Bryan Lyles and Drew Perkins will collaborate on a draft statement
     for the framework document on possible methods of supporting IP
     multicast.

   o Andy Malis will follow through on the multiple VC thrashing issue
     and will generate consensus.


Attendees

Masuma Ahmed             [e-mail]
Nick Alfano              [e-mail]
Anthony Alles            [e-mail]
Randall Atkinson         [e-mail]
Nutan Behki              [e-mail]
Ram Bhide
Richard Binder           [e-mail]
Jon Boone                [e-mail]
Erik-Jan Bos             [e-mail]
Al Broscius              [e-mail]
Caralyn Brown            [e-mail]
Theodore Brunner         [e-mail]
Steve Buchko             [e-mail]
Glen Cairns              [e-mail]
Enke Chen                [e-mail]
Ping Chen                [e-mail]
George Clapp             [e-mail]
Robert Cole              [e-mail]
Rob Coltun               [e-mail]
Michael Conn             [e-mail]
Matt Crawford            [e-mail]
James Davin              [e-mail]
Thomas Dimitri           [e-mail]
Kurt Dobbins             [e-mail]
Waychi Doo               [e-mail]
David Dubois             [e-mail]
Pierre Dupont            [e-mail]
Dario Ercole             [e-mail]
Julio Escobar            [e-mail]
Stefan Fassbender        [e-mail]
Steve Feldman            [e-mail]
William Fenner           [e-mail]
Robert Fenoglio          [e-mail]
Carlos Fernandez         [e-mail]
Robert Fink              [e-mail]
James Forster            [e-mail]
Dan Frommer              [e-mail]
Mark Garrett             [e-mail]
John Gawf                [e-mail]
Eugene Geer              [e-mail]
Robert Gilligan          [e-mail]
Mike Goguen              [e-mail]
Fengmin Gong             [e-mail]
Ramesh Govindan          [e-mail]
Daniel Grossman          [e-mail]
Robert Grow              [e-mail]
Stuart Hale              [e-mail]
Joel Halpern             [e-mail]
John Hanratty            [e-mail]
W.S. Harborth            [e-mail]
Dimitry Haskin           [e-mail]
Marc Hasson              [e-mail]
Ken Hayward              [e-mail]
Juha Heinanen            [e-mail]
Kathryn Hill             [e-mail]
Eric Hoffman             [e-mail]
Mike Holloway            [e-mail]
Refael Horev             [e-mail]
Kathy Huber              [e-mail]
Melanie Humphrey         [e-mail]
Ronald Jacoby            [e-mail]
B.V. Jagadeesh           [e-mail]
Merike Kaeo              [e-mail]
Yasuhiro Katsube         [e-mail]
David Kaufman            [e-mail]
Byonghak Kim             [e-mail]
Charles Kunzinger        [e-mail]
Ted Kuo                  [e-mail]
Sundar Kuttalingam       [e-mail]
Olav Kvittem             [e-mail]
Mark Laubach             [e-mail]
Joseph Liu               [e-mail]
Kim Long                 [e-mail]
Thang Lu                 [e-mail]
Bryan Lyles              [e-mail]
Andrew Malis             [e-mail]
Tracy Mallory            [e-mail]
Allison Mankin           [e-mail]
Matt Mathis              [e-mail]
Jun Matsukata            [e-mail]
Keith McCloghrie         [e-mail]
Donald Merritt           [e-mail]
Orly Nicklass            [e-mail]
Dan Nordell
Karen O'Donoghue         [e-mail]
Zbigniew Opalka          [e-mail]
Steve Parker             [e-mail]
Craig Partridge          [e-mail]
Laura Pate               [e-mail]
Maryann Perez            [e-mail]
Charles Perkins          [e-mail]
Drew Perkins             [e-mail]
Radia Perlman            [e-mail]
David Piscitello         [e-mail]
Robert Roden             [e-mail]
Benny Rodrig             [e-mail]
Doris Roland             [e-mail]
Allan Rubens             [e-mail]
Timothy Salo             [e-mail]
Hal Sandick              [e-mail]
Jean-Bernard Schmitt     [e-mail]
Martin Schulman          [e-mail]
Isil Sebuktekin          [e-mail]
Michael See              [e-mail]
Kanan Shah               [e-mail]
Satya Sharma             [e-mail]
Vincent Shekher          [e-mail]
Ming Sheu                [e-mail]
Uttam Shikarpur          [e-mail]
Chi Shue                 [e-mail]
W. David Sincoskie       [e-mail]
Andrew Smith             [e-mail]
Tae Song                 [e-mail]
Steve Suzuki             [e-mail]
George Swallow           [e-mail]
Matsuaki Terada          [e-mail]
Susan Thomson            [e-mail]
Hoe Trinh                [e-mail]
Keisuke Uehara           [e-mail]
Dono van-Mierop          [e-mail]
Thomas Walsh             [e-mail]
Chuck Warlick            [e-mail]
Guy Wells                [e-mail]
Douglas Williams         [e-mail]
Honda Wu                 [e-mail]
Liang Wu                 [e-mail]
Shinichi Yoshida         [e-mail]
Jessica Yu               [e-mail]
Chin Yuan                [e-mail]
Mauro Zallocco           [e-mail]
Weiping Zhao             [e-mail]