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isis-minutes-93jul.txt
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CURRENT_MEETING_REPORT_
Reported by Chris Gunner/Digital Equipment Corporation
Minutes of the IS-IS for IP Internets Working Group (ISIS)
The ISIS Working Group met for one session on Thursday morning. The
meeting started with a review of what was discussed at the previous
meeting, followed by status reports of work items from that meeting.
RFC 1195
Little progress has been made in the effort to advance the
standardization status of Integrated IS-IS (RFC 1195) from Proposed
Standard to Draft Standard. Examples of operational experience,
especially interworking between different implementations, and
implementations of the MIB were gratefully received. Other examples
should be reported to Chris Gunner.
Multicasting
At the last meeting, Radia Perlman briefly discussed a simple idea for
supporting multicast with Integrated IS-IS. Little progress has been
made on this. There was some discussion about how this relates to the
multicast work being done for CLNP (ISO 8473) and ES-IS (ISO 9542) by
ISO (although ISO is not working on multicast support in routing
protocols). The group felt that there should be some liaison between
the IETF group and the ISO group working on this topic. It is possible
that both multicast schemes might be useful and used in the same
network, for example, using the ISO scheme at level 2 while using
Radia's scheme at level 1.
Multi-Area Router
No progress has been made on the multi-area router idea discussed at the
last meeting. The group still thinks this is worthwhile and should be
written down as an Internet-Draft.
Multiple Levels of Hierarchy
No progress has been made on the multiple levels of hierarchy idea
proposed by Radia Perlman at the last meeting. There was some
discussion about whether this is useful if networks use IDRP as well as
IS-IS, since then two levels of hierarchy in IS-IS may be enough.
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Integrated IS-IS
There were a number of modifications to Integrated IS-IS discussed at
the last meeting. No progress has been made in defining these further:
o Designated router ``tenure.''
o Increasing the LSP number space to greater than 256.
o Modifying the metric range to 16 bits for each link and 32 bits for
external metrics.
o Increasing the number of pseudonode IDs to greater than 256 (this
can be done by applying the multi-area router idea).
Internet-Drafts
The other two subjects discussed at the last meeting, integration of IPX
and Appletalk and routing over non-broadcast multi-access (NBMA)
circuits, have made progress. There is an Internet-Draft for each. The
rest of the meeting was mostly spent discussing these documents.
The group felt that there was sufficient interest to continue working on
both documents.
The routing over NBMA Internet-Draft covers operation of Integrated
IS-IS, ES-IS, CLNP and IP. It could be applied to any NBMA-style circuit
such as SMDS, X.25, Frame Relay or ATM. There was some discussion about
how this overlapped with work going on in other IETF working groups and
ISO. The IP and CLNP aspects overlap with work done or being done by the
IPLPDN and ATM Working Groups. The group felt that we should liaise
with the other working groups where there was overlap. The ES-IS
aspects would require additions to the ES-IS protocol such as the
addition of an IP address option. Like the Integrated IS-IS protocol
itself, this modifies a protocol existing as an ISO standard. The
group's modus operandi so far has been, and will continue to be, to
carry on extending these protocols in the absence of any formal
relationship between the IETF and ISO.
Attendees
Ross Callon rcallon@wellfleet.com
Richard Colella colella@nist.gov
Jonathan Davar jdavar@synoptics.comm
Kjeld Borch Egevang kbe@craycom.dk
Dino Farinacci dino@cisco.com
Eugene Geer ewg@cc.bellcore.com
Mike Goguen goguen@synoptics.com
Chris Gunner gunner@dsmail.lkg.dec.com
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Patrick Hanel hanel@yoyodyne.trs.ntc.nokia.com
Susan Hares skh@merit.edu
Denise Heagerty denise@dxcoms.cern.ch
Ton Koelman koelman@stc.nato.int
David Marlow dmarlow@relay.nswc.navy.mil
Christian Panigl christian.panigl@cc.univie.ac.at
Georg Richter richter@uni-muenster.de
Rachel Willmer rachelw@spider.co.uk
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