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

Text File | 1994-02-23 | 8KB | 170 lines

CURRENT_MEETING_REPORT_


Reported by Robet Braden/Information Sciences Institute

Minutes of the Resource Reservation Setup Protocol BOF (RSVP)

This BOF introduced a new protocol, RSVP, designed for setting up
resource reservations in the Internet.  It is a necessary component of a
proposed extension of the Internet architecture to support integrated
service, i.e., to support delay-sensitive applications.

Dave Clark introduced the speakers, noting that Bob Braden and Deborah
Estrin had returned to LA to deal with the risk of fire to their homes.
The talk that Braden was going to give was instead given by John
Wroclawski, Scott Shenker and Lixia Zhang.  John gave the introduction,
Scott discussed the RSVP model, and Lixia Zhang discussed the RSVP
protocol itself.  John returned to discuss the future direction of the
working group.

There were questions confirming the basic paradigm that RSVP lives on
top of multicast routing, and that the PATH message serves the purpose
of assuring that RSVP can know the reverse path of the multicast route.

Merging, a complex topic, received some clarifying discussion.

Noel Chiappa proposed that a flow identifier would be a better means of
classifying packets.  There was considerable discussion concerning flow
IDs.  It was proposed that while a flow ID is a dandy optimization, it
was a mistake to make it a requirement.

It was noted that security may hide some of the fields in the packet
that might be used for packet classifying, but there must be some field
in the packet used to select the proper decryption key, which would
equally serve to classify a packet.  It was noted that on a fragmented
packet, some of the fields may be missing on all but the first
fragments.  Currently, MTU discovery is being used to avoid this
problem.  This is consistent with the current trend in the Internet away
from fragmentation.

There was discussion of the design decision within RSVP that the
receiver rather than the sender should make the reservation.  Some
situations were proposed in which the sender might be in a better
position than the receiver to make the reservation.  The distinction was
made that while in some cases it may be more direct for the sender to
make the actual request, even in those cases it was the receiver that
starts the process, and that understands what the request should be.

There was a discussion of ``route pinning,'' which describes the
objective of fixing the paths alone which resource reservations have
been made, in order to assure that the reservation remains in place.
Some members of the audience had concluded that RSVP did not intend to
achieve this sort of functionality, which led to the conclusion that the
``quality'' of the assurance that RSVP would achieve would be less than
that of a protocol such as ST-II. Lixia clarified this point, stating
that it was the intention of the RSVP designers that the assurance
quality of an RSVP guarantee be very robust.  However, they were of the
opinion that RSVP should not contain mechanism to prevent ``route
flapping,'' but that this ought to be a service of the routing protocol.
More discussion followed, and this topic was noted for further
discussion.  It was stressed from the floor that RSVP must architect its
behavior on route loss.

The final discussion topic concerned whether RSVP could rapidly respond
to network events, since it used timers to preserve its state.  The
presenters clarified this point, stressing that while RSVP used timers
and refresh messages to maintain state, this did not preclude the use of
event-driven messages to trigger recovery to such things as lost links.
It is in fact the intention of RSVP to use event-driven messages for
this purpose.

A proposed working group agenda was presented, and there was general
acceptance of forming a working group along those lines.


Attendees

Andy Adams               [e-mail]
Steve Alexander          [e-mail]
Anthony Alles            [e-mail]
Randall Atkinson         [e-mail]
William Barns            [e-mail]
Tom Benkart              [e-mail]
Lou Berger               [e-mail]
Luc Boulianne            [e-mail]
Robert Braden            [e-mail]
Monroe Bridges           [e-mail]
David Bridgham           [e-mail]
Al Broscius              [e-mail]
Steve Buchko             [e-mail]
Stephen Casner           [e-mail]
Isidro Castineyra        [e-mail]
John Chang               [e-mail]
Ping Chen                [e-mail]
J. Noel Chiappa          [e-mail]
David Clark              [e-mail]
James Davin              [e-mail]
Steve DeJarnett          [e-mail]
Luca Delgrossi           [e-mail]
Taso Devetzis            [e-mail]
Ed Ellesson              [e-mail]
Dino Farinacci           [e-mail]
Stefan Fassbender        [e-mail]
William Fenner           [e-mail]
James Forster            [e-mail]
Paul Francis             [e-mail]
Ron Frederick            [e-mail]
Dan Frommer              [e-mail]
Mark Garrett             [e-mail]
Fengmin Gong             [e-mail]
Ramesh Govindan          [e-mail]
Joel Gyllenskog          [e-mail]
John Hanratty            [e-mail]
Dimitry Haskin           [e-mail]
Ken Hayward              [e-mail]
Juha Heinanen            [e-mail]
Shai Herzog              [e-mail]
Russ Hobby               [e-mail]
Van Jacobson             [e-mail]
Ronald Jacoby            [e-mail]
Matthew Jonson           [e-mail]
Frank Kastenholz         [e-mail]
Yasuhiro Katsube         [e-mail]
David Kaufman            [e-mail]
Lee Kilpatrick           [e-mail]
David Kristol            [e-mail]
Ted Kuo                  [e-mail]
Jim Martin               [e-mail]
Thomas Maslen            [e-mail]
Donald Merritt           [e-mail]
Karen O'Donoghue         [e-mail]
Vijayaragavan Pandian    [e-mail]
Craig Partridge          [e-mail]
Laura Pate               [e-mail]
Maryann Perez            [e-mail]
Drew Perkins             [e-mail]
J. Mark Pullen           [e-mail]
Bala Rajagopalan         [e-mail]
Doris Roland             [e-mail]
Allyn Romanow            [e-mail]
Shawn Routhier           [e-mail]
Allan Rubens             [e-mail]
Hal Sandick              [e-mail]
Eve Schooler             [e-mail]
Henning Schulzrinne      [e-mail]
Isil Sebuktekin          [e-mail]
Michael See              [e-mail]
Kanan Shah               [e-mail]
Scott Shenker            [e-mail]
Ming Sheu                [e-mail]
W. David Sincoskie       [e-mail]
Karen Sollins            [e-mail]
Michael Speer            [e-mail]
Louis Steinberg          [e-mail]
John Stewart             [e-mail]
Matsuaki Terada          [e-mail]
Claudio Topolcic         [e-mail]
Jerry Toporek            [e-mail]
Dono van-Mierop          [e-mail]
Abel Weinrib             [e-mail]
Taehwan Weon             [e-mail]
Richard Woundy           [e-mail]
John Wroclawski          [e-mail]
Jean Yao                 [e-mail]
Shinichi Yoshida         [e-mail]
Jessica Yu               [e-mail]
Lixia Zhang              [e-mail]