home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Internet Info 1997 December
/
Internet_Info_CD-ROM_Walnut_Creek_December_1997.iso
/
ietf
/
rsvp
/
rsvp-minutes-95dec.txt
< prev
next >
Wrap
Text File
|
1996-06-03
|
6KB
|
161 lines
CURRENT MEETING REPORT
Reported by Bob Braden, Information Sciences Institute and Lixia
Zhang, Xerox Palo Alto Research Center
Minutes of the Resource Reservation Setup Protocol Working Group
(RSVP)
Summary
The first session was devoted to reports and discussion. During the
second session resolution was reached on the open issues, and the
working group agreed that the Version 1 RSVP protocol specification,
after final revisions, should be undergo working-group-last-call,
followed by submission to the IESG.
Agenda for the Monday, December 4 Session:
o Report on Interop demo of RSVP/intserv: Mark Baugher, Intel
o Report on interim RSVP WG Meeting -- Bob Braden, ISI
o Diagnostic message: Lixia Zhang, PARC
o Discussion of open issues
Report on Interop demo of RSVP/intserv: Mark Baugher
Mark Baugher reported on the successful multi-vendor interoperability
demo of RSVP implementations at the Atlanta Interop in September.
The vendors involved were Bay Networks, cisco, SGI, Sun, Intel, and
Starlight.
The applications included ShowMe-TV (Sun), nv (SGI), Startworks,
Eviewer, and HQV/NFS. The realtime support was a single level
controlled-load service. The host vendors used RSVP implementations
ported from the ISI prototype RSVP daemon rsvpd. A carefully defined
subset of the protocol was used, including WF and FF styles, but
excluding SE style, the SCOPE object (the demo topology had no loops),
advertising, dynamic flowspec adjustment, and security.
Baugher played a short video tape made during the demo, showing
convincingly the beneficial effect of a reservation on audio and video
streams. More trial and demo's are planned early next year.
Agenda -- Wednesday 6 December Session:
o Resolution of open issues
o Last-Call action
o RSVP Authentication: Fred Baker, Cisco
o Accounting and access control: Shai Herzog, ISI
o Future Working Group priorities
Resolution of open issues
The Working Group agreed on resolutions for the outstanding issues, in
order to complete action on the Version 1 protocol spec and submit it to
the IESG.
o Diagnostic message
Agreed to publish RSVP diagnostic message specification
separately.
o Soft ACKs
Agreed to accept the CONFIRM mechanism as defined in the current
spec.
o Error Actions
Following the Monday session, the trio of Lee Breslau, Bruce Davie,
and Shai Herzog outlined a proposed solution to the denial-of-
service problem posed in the first session by Fred Baker. This was
the result of many hours of work on their part.
Lixia Zhang presented a slide outlining a much simplified version of
the above, which solves the Baker problem but does not support
persistent reservation request forwarding. A concensus of the
Working Group accepted Lixia's mechanism in preference to that
developed by Breslau, Davie, and Herzog.
John Wroclawski then observed that there are multiple classes of
error conditions, and that an application may wish to have its
request forwarded for some error classes and receive an error message
for other classes. He proposed to use an "error-vector" to let users
choose, for each of the failure classes, between sending an error and
forwarding a failed request. The error-vectors of all merged requests
would be ANDed together to produce the merged error-vector (that
is, the merged request will stop and trigger an error message if any of
the users requested so). The Working Group accepted Wroclawski's
proposal.
o Tunnels
John Wroclawski suggested that (1) the recursive application of
RSVP is the right solution to this problem, and (2) this can, and
should, be documented separately from the RSVP spec itself. The
demuxing field was not discussed further. It was agreed to postpone
further discussion of these issues.
Last Call Action
The Working Group reached a consensus to proceed with the version 1
protocol spec with the agreed revisions. Following the update there
will be a working-group last-call sometime in early January. After
working group consensus is reached, we will forward the RSVP spec to
IESG for consideration to move to Proposed Standard.
RSVP Authentication: Fred Baker, Cisco
Fred Baker reported briefly that RFC1826 appears to provide the same
security functionality as the Keyed MD5 INTEGRITY mechanism that
he had proposed in his draft -rsvp-md5-01.txt. He agreed to
investigate this further; it implies that the INTEGRITY object is
unneeded and should be dropped.
Accounting and access control: Shai Herzog, ISI
Shai Herzog made a presentation on how accounting and access control
can be added to RSVP. In his model, some routers are "policy
gateways" that verify and rewrite credentials based upon bilateral
agreements between neighbors, and do not rely on any global
information or agreements. He proposes to add a Local Policy Module
(LPM) that interacts with RSVP and with traffic control, and he
presented generic interfaces between RSVP and the LPM. Herzog also
proposed a new type of RSVP message, named Reservation Report. The
report can include a simple ack or a more sophisticated policy based
feedback (like the cost of a reservation). Report messages flows from
the source host downstream to receivers, forwarded hop-by-hop only
along those reserved branches where receivers have requested a report
(by setting a Report-request bit in their reservation requests).
The working group voted to make the accounting interface a high
priority action item. Herzog Shai will prepare an internet-draft
proposal and a document suggesting the modification to the RSVP spec
for supporting the LPM architecture.
Future Working Group Activities
There was a very brief discussion of priorities for future Working Group
activities. The highest priority was given to accounting models and
standards. Second priority was split among diagnostic and management
capabilities--the MIB and the diagnostic message--and support for
active-QoS link layers. With respect to the last, it was announced that
there will be a joint meeting of the RSVP, Int-Serv, and IP-ATM
Working Groups at the next IETF meeting.
Other future Working Group activities should include: (1) protocol
extensions e.g., new styles, multi-session reservations, CIDR-
knowledgable filtering, and traffic splitting; (2) tunnels; (3) security;
and (4) more advanced treatment of error conditions.