CURRENT_MEETING_REPORT_
Reported by Rob Hagens/University of Wisconsin
OSIGEN Minutes
Agenda
o Presentation of the NSFNET CLNP Pilot - Sue Hares.
o Presentation of the RARE CLNS Project - Juha Heinanen.
o Discussion of NSAP guidelines issues.
This meeting was honored with the presence of many X3S3.3 members.
Sue Hares presented an informal description of the NSFNET CLNP Pilot
project. The CLNP prototype operating in the NSFNET backbone was first
demonstrated in 1989 at INTEROP. This CLNP prototype is based upon the
original CLNP implementation written by Rob Hagens at the University of
Wisconsin - Madison (ARGO) which was later modified to operate in the
NSFNET NSS environment by Dave Katz at Merit/NSFNET. The CLNP service
was fully deployed as an ``experimental prototype'' by August 1990.
It is possible to obtain an NSAP address under the NSFNET OSI test AAI.
This NSAP will be valid during the course of the CLNP prototype. It is
not a permanent NSAP. Contact ``nsfnet-admin@merit.edu'' for more
information about getting a test AAI.
Juha Heinanen discussed the RARE CLNS Project. Rare has to prepare for
CLNS because of:
o Decnet Phase V.
o NSFNET and Internet is likely to employ CLNS instead of CONS.
o A need for an OSI network service for LAN environments.
The goals of the RARE CLNS project are:
o Gain practical experience in CLNS networking (interoperability,
routing, performance).
o Produce a CLNS specific RARE NSAP recommendation.
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o Propose how to organize the operation and management of CLNS
networking in Europe.
o Provide a testbed for CONS/CLNS interworking experiments.
Nordunet has several CLNS routing domains which are connected via Cisco
routers. These routing domains are connected to the NSFNET prototype
CLNP service via Nordunet, IXI and RIPE X.25 connected to CERN.
The NSAP format in use today is based upon AFI 39, with a DSP which
contains:
o Version (1 byte)
o Organization (3 bytes)
o Routing domain (2 bytes)
o Area (2 bytes)
o Host (6 bytes)
o Selector (1 byte)
A review of the NSAP guidelines document showed that both topological
and administrative address assignment policies have their advantages and
flaws. The ``change of address'' problem was discussed. This problem
occurs when an ES moves from one regional to another. Two options were
identified:
o Send ER with ``address not valid code''.
o Automatically forward the packet.
The packet may be forwarded by either forcing the old regional to keep
track of old addresses, or by forcing the new regional to advertise the
old addresses. This process may involve encapsulation as well. A
thorough written analysis of these scenerios is required.
A second issue that was discussed was the problem that occurs when a
site is connected to more than one regional. Three solutions were
discussed.
o Define one address to be advertised to all three regionals.
o Break the site into pieces, each with different addresses.
o Make all hosts in the site multi-homed.
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There was no consensus on the best solution to the problem. It is not
clear whether there has to be one solution to the problem. The major
issue is how will the various strategies affect the architecture,
protocols, algorithms and economies of Internet growth.
Attendees
Ross Callon callon@bigfut.enet.dec.com
Lida Carrier lida@apple.com
A. Lyman Chapin Lyman@bbn.com
Chris Chiotasso chris@roswell.spartacus.com
Richard Colella colella@osi3.ncsl.nist.gov
Robert Cooney cooney@wnyose.nardac-dc.navy.mil
Curtis Cox zk0001@nhis.navy.mil
Burt Cyr burt@uncng.com
Larry Green green@pei.com
Robert Hagens hagens@cs.wisc.edu
Joel Halpern jmh@nsco.network.com
Alf Hansen Alf.Hansen@pilot.cs.wisc.edu
Susan Hares skh@merit.edu
Juha Heinanen jh@funet.fi
Scott Hiles whiles@relay.nswc.navy.mil
Fred Klein
Mark Koro koro@dockmaster.mil
Timothy Kuik kuik@stpaul.ncr.com
Charles Kunzinger kunzinge@ralvmg.iinus1.ibm.com
David Marlow dmarlow@relay.nswc.navy.mil
Judy Messing messing@gateway.mitre.org
Daniel Molinelli moline@trw.com
Douglas Montgomery dougm@osi3.ncsl.nist.gov
James Mostek mostek@cray.com
James Moulton Cobra!jmoul@bellcore.com
Mark Needleman mhn@stubbs.ucop.edu
David Oran oran@sneezy.enet.dec.com
Nelluri Reddy nlr@partha.udev.cdc.com
Theresa Senn tcs@cray.com
Harvey Shapiro shapiro@wnyose.nardac-dc.navy.mil
Mark Sleeper mws@sparta.com
Emil Sturniolo
Edward Taylor ebtaylor@ralvmg.iinus1.ibm.com
Kaj Tesink
David Waitzman djw@bbn.com
Dale Walters walters@osi3.ncsl.nist.gov
Linda Winkler b32357@anlvm.ctd.anl.gov
Dan Wintringham danw@osc.edu
Russ Wright wright@lbl.gov
Fei Xu fei@tdd.sj.nec.com
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