Internet Info 1994 March/Internet Info CD-ROM (Walnut Creek) (March 1994).iso/inet/ietf/ospf/ospf-minutes-92nov.txt

Text File | 1993-02-17 | 6.7 KB | 162 lines

Editor's Note: 11/23/92

CURRENT_MEETING_REPORT_


Reported by John Moy/Proteon

Minutes of the Open Shortest Path First IGP Working Group (OSPF)

The OSPF Working Group met at the November 1992 IETF in Washington, D.C.

The meeting began with some administrative details.  For those that had
missed the announcement, it was mentioned that RFCs 1370/1371 had been
published, officially making OSPF the recommended IGP for the TCP/IP
Internet.  Next, an informal poll was taken concerning attendance at
next year's Amsterdam IETF. Based on that poll, the OSPF Working Group
will probably not meet at that IETF. Lastly, there was some discussion
of maintenance of the OSPF mailing list (trantor.umd.edu needs a
forwarding record for ospf-request).

The last call for comments was started on four documents.  These
documents have been stable for a number of months, and we hope to have
them issued as RFCs before the next IETF (the latest versions of all of
them had been issued as Internet-Drafts before the meeting):


   o The OSPF V2 specification.  Two changes have been made since the
     last meeting.  First, the definition of the Link State ID in type 3
     and 5 LSAs has been relaxed to support CIDR (supernetting),
     allowing one or more of the Link State IDs host bits to be set.
     Since this will soon be an operational issue, vendors were
     encouraged to modify their implementations accordingly as soon as
     possible.  It was decided to make the default route a special case,
     requiring both its mask and its Link State ID to be 0.0.0.0.  The
     other change to the spec was a reminder not to set the ``AS
     boundary router'' bit in router-LSAs for stub areas.
   o The OSPF MIB. Changes had been made to allow host routes to be
     deleted, and to support the new NSSA and multicast routing options.
     At the meeting, it was decided to clear up the definition of the
     ospfAreaLsaCksumSum object, making it clear that it included
     optional LSAs (like the group-membership-LSA) and therefore was not
     necessarily the same for all routers in an area.  Also, to better
     support supernetting, it was decided to include a network mask in
     the Link State Database and External Link State Database tables.
   o The NSSA option.  At the meeting it was decided to change the
     document to allow summarization of type 7 LSAs into a single type 5
     LSA at NSSA boundaries.
   o The OSPF Trap MIB. This document has remained unchanged since the
     last meeting.


A number of issues were brought up by Robert Ching, on behalf of the
OSPF Forum.  Most were just requests for technical clarification
(addressed in the meeting, but omitted from these notes in the interest
of brevity).  There was desire for an OSPF/RIP transition document (any
volunteers?).  Also, there was some confusion over the way OSPF

                                   1





represented serial lines.  As John Moy explained, they are represented
in router-LSAs as a direct connection to a neighbor, with each
neighboring router advertising the other's serial line address as a
(stub) host route.  This encourages pings to a serial line address to
actually traverse the serial line.  However, two other representations
are also possible:  each neighboring router advertising its own address
as a host route, or each neighboring router advertising a stub route to
a subnet that has been allocated to the serial line.  It was pointed out
that the latter representation had the problem that traffic addressed to
a non- existent host on the serial line had a tendency to loop until its
TTL expired.

Osmund deSouza outlined a proposed usage document for OSPF over Frame
relay.  Requiring no protocol changes, this document would allow a Frame
relay network to be configured as an arbitrary collection of NBMA
networks, numbered and unnumbered serial lines.

Tom Pusateri presented his document on running IP multicast over 802.5
networks.  A functional address (03-00-00-20-00-00) has been allocated,
and Tom's document mandates that the token-ring address be configurable
as either the all-ones broadcast MAC address (current practice), the new
functional address or a group address (for possible future definition
when token ring controller support is available).  This document should
soon be published as an RFC.

John Moy led a discussion of his proposal for how to deal with OSPF
database overflow.  It was decided to:


  1. Exempt default routes from the limit calculation.

  2. Automatically regenerate routes that have been earlier flushed due
     to database overflow (this regeneration will be done after some
     random interval between 1 minute and a configurable upper bound,
     with an option to completely disable the regeneration) and,

  3. Set the LSA limit (which must be the same through all routers)
     through SNMP. Hopefully we will have a document describing this in
     detail next meeting.


At the end of the meeting, mention was made of two possible new work
items:


  1. A scheme to use the OSPF tag field and a new LSA type to replace
     IBGP and,
  2. A new authentication type using something like MD5.  These are
     possible subjects for the next meeting.


Attendees


                                   2





Fred Baker               [e-mail]
Ken Benstead             [e-mail]
Jeffrey Burgan           [e-mail]
Dean Cheng               [e-mail]
Robert Ching             [e-mail]
Rob Coltun               [e-mail]
Osmund de Souza          [e-mail]
Vince Fuller             [e-mail]
William Haggerty         [e-mail]
Jonathan Hsu             [e-mail]
Akira Kato               [e-mail]
David LeRoy              [e-mail]
Tony Li                  [e-mail]
Olli-Pekka Lintula       [e-mail]
Robin Littlefield        [e-mail]
Kent Malave              [e-mail]
Jun Matsukata            [e-mail]
David Meyer              [e-mail]
Douglas Miller           [e-mail]
John Moy                 [e-mail]
Julianne Myers           [e-mail]
Laura Pate               [e-mail]
Thomas Pusateri          [e-mail]
Manoel Rodrigues         [e-mail]
Paul Serice              [e-mail]
Erik Sherk               [e-mail]
Roy Spitzer              [e-mail]
John Tavs                [e-mail]
Paul Traina              [e-mail]
Iain Wacey               [e-mail]
James Watt               [e-mail]
Luanne Waul              [e-mail]
Douglas Williams         [e-mail]
Linda Winkler            [e-mail]



                                   3