Internet Info 1997 December/Internet_Info_CD-ROM_Walnut_Creek_December_1997.iso/ietf/95apr/area.routing.95apr.txt

Text File | 1995-05-26 | 8KB | 189 lines

Routing Area

Director:


   o Joel Halpern:  [e-mail]


Area Summary reported by Joel Halpern/Newbridge Networks
Corporation


Inter-Domain Multicast Routing Working Group (IDMR)

The focus of the Danvers meetings was whether there is evidence to
substantiate the need for shortest-path multicast trees for inter-domain
multicasting (it would seem that the available documentation suggests
not).  The simulation results carried out comparing CBT and PIM showed
CBT incurred less average delay between receivers than had been
previously thought.  These results, of course, must be put into
perspective given the somewhat connectivity-poor simulation topologies.
In terms of protocol and bandwidth overhead, it was shown that both
protocols perform similarly overall.

Further simulations using more redundant topologies are to be conducted,
and it is hoped these results will be available for the meetings in
Stockholm.

Implementation work is continuing on both protocols, and both are being
implemented in `gated.'  As the debate on whether multicast SPTs are
appropriate for inter-domain multicasting could not be resolved, it
would seem that implementation experience will be the deciding factor.
A number of people voiced the opinion that the market should decide in
any event.


Inter-Domain Routing Working Group (IDR)

The following items were discussed at the IDR Working Group meeting:


   o Selective Updates in Inter-Domain Routing
   o A Further Application for RIFs:  De-aggregation in ATM Clouds
   o BGP/IDRP Route Server Proposal
   o BGP Communities
   o Routing Confederations
   o AS Guidelines
   o BGP-4 to Full Standard
   o IDRP for IPv4 and IPv6
   o Performance Related Attributes for IDRP
   o BGP AS Path Metrics


It was agreed to publish BGP/IDRP Route Server as an Experimental RFC,
to publish BGP Communities as an Experimental RFC, to ask the IESG to
advance the AS Guidelines document (after appropriate modifications) to
a Proposed Standard, and to prepare all the necessary documents to move
BGP4 to a full Standard by the next IETF.


IP Routing for Wireless/Mobile Hosts Working Group (MOBILEIP)

MOBILEIP met and the group has reached a point of consensus that should
enable implementations to proceed.  The group discussed broadcast and
multicast issues, address usage in the protocol, and resolved several
other minor problems with the -9 draft.  The only outstanding issue
involves two IBM patents and the lack of a clear and precise statement
from IBM as to the terms (if any) with which IBM makes these
technologies available.  The perception of the co-chairs is that the
underwhelming number of Mobile IP implementations is due in large part
to this outstanding patent issue.  Nonetheless, several working group
members plan to implement Mobile IP for interoperability testing
scheduled tentatively for the August time frame.  Charlie Perkins,
working group editor, hopes to have an updated (and quasi-final) draft
available by the end of April.


New Internet Routing and Addressing Architecture Working Group
(NIMROD)

   o Charlie Lynn gave an overview of the Deployment Document.  He
     discussed strategies for the gradual integration of Nimrod in the
     Internet.

   o Martha Steenstrup presented a list of information elements that
     could be obtained by either configuration or discovery.  For each
     element, Martha discussed the trade-offs and the current thoughts
     on what to do with that element.

   o Isidro Castineyra described a bootstrap model for Nimrod.

   o Martha Steenstrup described an alternative bootstrap model.

   o Charlie Lynn presented the current software architecture for the
     BBN implementation of Nimrod.

   o Martha Steenstrup listed alternatives for path setup.


Open Shortest Path First IGP Working Group (OSPF)

At the Danvers IETF, the OSPF Working Group did the following:  Proposed
modifications to the base OSPF specification were reviewed.  The current
approach for OSPF for IPv6 was outlined.  The current states of the OSPF
MIB document, the CIDR routing table MIB and OSPF MD5 authentication
were described.  Possible ways to use OSPF to solve the ROLC problem
were explored.  The meeting ended with a discussion of a proposal to
enhance OSPF security by signing individual LSAs.


Router Requirements Working Group (RREQ)

The Router Requirements Working Group met for one session.  Minor
editorial changes to the draft were discussed.  A small change to
wording to clarify certain security issues was made.  The draft is in
Last Call for becoming a Proposed Standard.


Routing Information Protocol Working Group (RIP)

The RIP Working Group met on Thursday.  The group began with a
presentation of the agenda and of the current documents associated with
the group's charter.

Fred Baker gave a brief presentation of the changes to his
Internet-Draft on cryptographic authentication for RIP-2.  The group
agreed with the changes.  The draft will be submitted for consideration
as a Proposed Standard next week.

Gerry Meyer gave a presentation on his Internet-Draft on demand circuit
RIP. This draft updates the current Proposed Standard RFC-1582.  There
was significant discussion about the handling of slow links and devices
with many more logical addresses than physical interfaces.  It was
decided that these issues should be resolved between Gerry and the
interested parties prior to submitting into the standards track.
Whether it goes in as Proposed or Draft will be determined by the extent
of the changes.

The group continued and completed discussions started on the mailing
list by Paul Traina.  The changes to the RFCs are detailed in the
meeting minutes.

The group discussed the RIPng draft.  There was concern that it is the
minimal possible change from RIP-1 and RIP-2.  However, that was the
condition set forth by the area director for the draft`s creation.  It
will be submitted for consideration as a Proposed Standard.


Routing Over Large Clouds Working Group (ROLC)

There were 125 attendees.

The working group received an ATM Forum Multiprotocol over ATM report
from George Swallow.

Dave Katz led a review of the current NHRP draft,
draft-ietf-rolc-nhrp-IV.txt, which had been distributed on the mailing
list the previous week.  A number of action items for the editors were
generated.  An official revision of the specification, to be version
-04, will include changes generated at the meeting and is expected to be
distributed as an Internet-Draft several weeks following the conclusion
of the meeting.

Derya Cansever led a review of the NHRP Applicability Statement,
draft-ietf-rolc-nhrp-appl-01.txt.  An updated version will be
forthcoming.

Mike Patrick led a review of the NHRP MIB,
draft-ietf-rolc-nhrp-mib-00.txt.  An updated version will be
forthcoming.

Kanan Shah will be producing a Protocol Analysis draft for the next
working group meeting.

The work plan was updated, and will be reflected in a charter update.


Source Demand Routing Working Group (SDR)

Yakov Rehkter presented the current version of Explicit Routing Protocol
(ERP) and its recent changes.  The forwarding algorithm for strict hops
in the explicit route has been worked out more carefully and appears to
operate correctly.  Steve Deering pointed out that ERP is less space
efficient than simple recursive encapsulation.  However, this implies
that a router's FIB must contain some indication of all immediately
adjacent regions so that strict hops can be properly supported.