Internet Info 1997 December/Internet_Info_CD-ROM_Walnut_Creek_December_1997.iso/ietf/isis/isis-minutes-90feb.txt

Text File | 1993-02-17 | 6KB | 135 lines

CURRENT_MEETING_REPORT_


MINUTES

The meeting was convened by Steven Willis.  An attendance list will be
published with the Proceedings of the IETF.

Dave Oran updated the status of the ANSI IS-IS document.  It had now
reached Draft proposal stage and had been assigned the ISO number 10589.
He discussed some of the recent modifications:


   o The LOC-AREA portion of the address was now gone.
   o Partition repair is now optional.
   o Two multicast addresses had been assigned for level 1 and level 2
     intermediate systems.


The working group addressed a number of issues outstanding from the
previous meeting in Ann Arbor.  In particular :


   o Someone brought up the point that it may be limiting for an IP
     router to only encapsulate over 802.3.  (i.e., doing IP IS-IS over
     HDLC). Do we want to consider changing encapsulation from 802.3 to
     IP to allow for the additional link-layer flexibility?
   o The IP L1 partition repair is a bit flaky.  Do we want to just say
     that this is not allowed for IP or do we want to fix it?  (Not a
     straight-forward task).
   o Dave Oran has corrections for IP routing exchange authentication.
     We didn't resolve what to do with an authentication mismatch.  Drop
     the packet and what management information?
   o Presently, the Integrated IP spec says that IP external links can
     just be generated by L2 routers.  This limits the topology (it
     cannot have a pocket of rip routers anywhere in an area that aren't
     connected to a L2 router) and will make it hard to transition from
     another IGP to IP IS-IS. The suggestion was made to be able to
     generate IP external information at L1 - this is a good idea but
     potentially creates a problem when AS border gateways are at L1 but
     are in different areas.  Since AS external information is not
     flooded into areas, L1 routers in different areas will not hear
     another AS's border router's external information - thus t, Cris
     BGP won't work in the transit AS case - We were not sure how this
     will affect other EGPs.
   o There was some debate about the merits of forwarding based upon
     default metric if there is no path using desired metric.
     Forwarding as we currently allow may result in violation of policy.
     Dropping packet isn't friendly.  No conclusions.  Tony Lauck
     pointed out there were three solutions to handling datagrams with
     TOS not supported by an intermediate system :

      1. Let the packet disappear into a black hole

                                   1






      2. Map the TOS into another TOS supported by the IS
      3. Drop the packet and generate an ICMP message back to source.

     Solution 3 appeared to be the best answer, but it was unclear as
     what the ICMP type code should be.
   o We discussed the possibility of running a partial Dykstra if only
     the leaves of the tree had changed.  Dave Oran pointed out that
     this was an implementation issue and suggested that an
     Implementor's Hints Annex be added to the IS-IS specification to
     address these issues.



ATTENDEES

    Almquist, Philip                  [e-mail]
    Bagnall, Doug                     [e-mail]
    Baker, Fred                      [e-mail]
    Bare, Ballard                     [e-mail]
    Brunner, Ted                     [e-mail]
    Bryant, Stewart                   [e-mail]
    Cerf, Vint                       [e-mail]
    Chapin, Lyman                     [e-mail]
    Chatterjee, Samir                 [e-mail]
    Colella, Richard                  [e-mail]
    Deboo, Farokh                     sun!iruucp!ntrlink!fjd
    Farinacci, Dino                   [e-mail]
    Ferguson, Dennis                  [e-mail]
    Froyd, Stan                      [e-mail]
    Gan, Der-Hwa                     no email
    Goguely, Herve                    [e-mail]
    Hagens, Rob                      [e-mail]
    Hain, Tony                       [e-mail]
    Heinanen, Juha                    [e-mail]
    Hytry, Tom                       [e-mail]
    Karels, Mike                     [e-mail]
    Katz, Dave                       [e-mail]
    Kellen, Daniel                    [e-mail]
    Lauck, Tony                      [e-mail]
    Little, Mike                     [e-mail]
    Marcinkevicz, Mike                [e-mail]
    Minshall, Greg                    [e-mail]
    Mogul, Jeff                      [e-mail]
    Morris, Dennis                    [e-mail]
    O'Leary, Dave                     [e-mail]
    Oran, David                      [e-mail]
    Perlman, Radia                    no email
    Reilly, Michael                   [e-mail]
    Rekhter, Yakov                    [e-mail]
    Senum, Steve                     [e-mail]
    Sheridan, Jim                     [e-mail]
    Sklower, Keith                    [e-mail]
    Solensky, Frank                   [e-mail]

                                   2






Staw, Tony                       [e-mail]
Sturtevant, Allen                 [e-mail]
Tsuchiya, Paul                    [e-mail]
Willis, Steven                    [e-mail]
Winkler, Linda                    [e-mail]
Woodburn, Robert                  [e-mail]



                               3