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bgpdepl-minutes-92jul.txt
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1993-02-17
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Editor's Note: Minutes received 7/31}
CURRENT_MEETING_REPORT_
Reported by Matt Mathis/PSC
Minutes of the Border Gateway Protocol Deployment and
Application Working Group (BGPDEPL)
Executive Summary
The Internet BGP topology was presented. There are about 25
administrative systems which are reachable from the NSFnet via EGP2, and
about 40 which are reachable via BGP.
Peter Lothberg described the European EBONE BGP deployment. In several
ways EBONE is further along in BGP deployment than US networks.
Several vendors described the status of their implementations. CISCO
and Cornell gated have BGP3 running today, and are working on BGP4. BBN
has BGP3 running and is working on BGP4. Other vendors including
Proteon and Wellfleet are actively working on BGP3 in preparation for
BGP4.
ANS intends to have BGP4 deployed January 1993 and has offered to help
vendors with interoperability testing. Vendors can arrange to bring
equipment into the ANS test facility. ANS is also exploring support for
remote testing by ``tunneling'' BGP from the ANS test network through
the NSFnet. Contact Jordan Becker for further information.
Minutes
Two representations of the known BGP topology of the Internet were
presented. The first was a map compiled by Jessica Yu, of Merit, which
is compilation of several sources including Merit configuration
databases and routing information extracted from the NSFnet T1 and T3
backbones. The other was BGP routing table as extracted from a router
in Pittsburgh which was peering with both NSFnet backbones. The BGP
topology includes about 40 administrative systems. There are only 25
administrative systems which are visible with EGP2 as the protocol of
origin. Note that EGP2 does not propagate further topological detail,
so there are additional EGP2 only administrative systems beyond the 25
which are visible.
One interesting artifact was noted: The T1 backbone does not run IBGP
so it can not propagate BGP path information. All BGP routes learned
via the T1 backbone show one administrative system beyond the backbone
itself with the ``incomplete'' origin attribute. This is dangerous
because it completely defeats BGP loop suppression.
Peter Lothberg described the European EBONE BGP deployment. They are
using BGP3 in an unusual configuration where it is, in effect, their
interior routing protocol. All EBONE routers are border routers.
(There are no interior routers). The EBONE IGP (cisco's IGRP) is used
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only to distribute the EBONE internal links and interfaces. The IGP
does not carry exterior routes at all. IBGP is run as a fully
interconnected mesh between all routers. Tony Li of cisco added a
configuration feature to BGP to defeat the IGP alignment check. Thus
every router has an IBGP route for for all exterior networks and an IGP
route for EBONE routers. Packet switching takes two route lookups: one
to select the exit router and then to find the interior route to that
exit router.
Peter described several routing misadventures that they encountered, as
well as European configuration management issues and related politics.
Several vendors described the status of their implementations. Nearly
all of the major router vendors were present and actively working on
various aspects of BGP.
o Proteon plans to support BGP3 in release 13 for ``all platforms''
by the end of the year.
o Wellfleet plans to have BGP3 in mid '93.
o BBN will be replacing the MILNET mailbridges by T20s in about six
months. the T20's will do IBGP with each other, and will support
BGP2, BGP3 and EGP2.
o cisco did a full rewrite of their BGP code earlier this year.
Version 9.02 has many patches from early testing in Alternet and
NEARnet. Check release notes on ftp.cisco.com.
o The T3 backbone (ANS) will be running BGP3 in the fall, using a
gated based implementation. (The current version is routed based).
They plan to have BGP4 early '93.
o CA*NET is currently using BGP3 in gated. BGP4 will require
significant changes to gated, but may be available in the fall.
The current Cornell gated code includes the CA*NET BGP3 code.
There was discussion about what the mid-levels could to help the
vendors. Tony Li of cisco indicated that test installations would be
useful. Their primary tool has been core dumps from sites which are
having problems. It was noted that it is difficult to test BGP in a
laboratory, because the interesting behaviors come from its ability to
represent complex events in the global internet.
Jordan Becker volunteered to provide vendors with access to the ANS test
facility for BGP interoperability testing. Contact him for details.
There was also discussion about adding a feature to the ANS gated to
support BGP tunneled from the ANS test facility across the Internet.
This would permit remote vendors to do initial interoperability testing
in their own labs. The necessary code change is trivial but there are
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some operational and scheduling issues to be addressed. Contact Jordan
Becker.
There was a short discussion of the forms being used for exchanging
Routing Policy and configurations. These forms are an initial attempt
at a mechanism to detect certain classes of global policy
inconsistencies. RIPE commented that the forms should be network
oriented, and not AS oriented.
Attendees
Nagaraj Arunkumar nak@3com.com
Tony Bates tony@ean-relay.ac.uk
Jordan Becker becker@nis.ans.net
David Bolen db3l@nis.ans.net
Henry Clark henryc@oar.net
Michael Craren mjc@proteon.com
John Curran jcurran@bbn.com
Osmund de Souza osmund.desouza@att.com
Dino Farinacci dino@cisco.com
Stefan Fassbender stf@easi.net
Dennis Ferguson dennis@mrbill.canet.ca
Peter Ford peter@lanl.gov
Vince Fuller vaf@stanford.edu
Der-Hwa Gan dhg@nsd.3com.com
Elise Gerich epg@merit.edu
Eugene Hastings hastings@a.psc.edu
Kathleen Huber khuber@bbn.com
Steven Hubert hubert@cac.washington.edu
Paulina Knibbe knibbe@cisco.com
Mark Knopper mak@merit.edu
John Krawczyk jkrawczy@wellfleet.com
Tony Li tli@cisco.com
Daniel Long long@nic.near.net
Matt Mathis mathis@a.psc.edu
Dennis Morris morrisd@imo-uvax.disa.mil
Brad Passwaters bjp@sura.net
Robert Reschly reschly@brl.mil
Erik Sherk sherk@sura.net
Roxanne Streeter streeter@nsipo.arc.nasa.gov
Marten Terpstra terpstra@ripe.net
Carol Ward cward@westnet.net
Chris Wheeler cwheeler@cac.washington.edu
Linda Winkler lwinkler@anl.gov
Jane Wojcik jwojcik@bbn.com
Paul Zawada Zawada@ncsa.uiuc.edu
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