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IETF-99 isis minutes

Session 2017-07-17 1330-1530: Karlin III - Audio stream - isis chatroom

Minutes

minutes-99-isis-00 minutes



          IS-IS Etherpad
          Scribe: Acee Lindem (acee@lindem.com)
          
          
            IS-IS WG Agenda IETF-99
          
          Time Slot (120m): Monday, July 17, 2017 13:30-15:30 CEST
          
          * Intro, Adminastriva, Document Status
                  Presenter: Chairs (Christian Hopps, Hannes Gredler)
              - OpenFabric will not be presented.
          
          * Combined IGP-LS GROUP Proposal - Chris Hopps
              - Lots of overlapp
              - However, audiences are not exactly the same.
              - May be harder to reach consensus.
              - Proposal: Combine OSPF an IS-IS
                  * Run join session in Singapore.
                  * Combne mailing list
            Loa Andersson: Doesn't see it as necessarily less work.
            Chris Hopps: Could potentially have one draft with OSPF
                         and IS-IS.
            Loa: Would be very confusing with one draft.
            Les Ginsberg: Could start with back-to-back sessions in
                          one meeting.
            David Lamparter: Believe protocol user space is not that
                             diverse.
            Chris: Believes smaller operagtors don't attend IETF.
            Chris Bowers: Thinks that common use case documents would
                          be useful.
            Mikal Abrahamsson: Do we need effort to align features between
                               protocols?
            Acee Lindem: Believes we have the features available to do
                         anything we want in support of features. There
                         will be different protocol mechanism
                         enhancements.
            Hannes Gredler: Room poll supporting merger - about 50/50
                            for/against.
          
          
          * IS-IS TE Attributes per application
                  Presenter: Les Ginsberg
                  Document:
                  https://datatracker.ietf.org/doc/draft-ginsberg-isis-te-app/
            Chris Hopps: Why do you need legacy bit?
            Les Ginsberg: How do say not to use the new attributes?
            Peter Psenak: This gives you explicit advertisement for all
            applications.
            Les Ginsberg: Gives you a set of attributes for an application.
            Hannes Gredler: Deviation from how we have migrated IS-IS in the past?
                            How do support old and new?
            Les: This is how to use attributes for new applications - not using
                 different attributes.
          
            Bruno Decraene: How does this work with attributes used for remote-LFA?
            Les: You can use legacy advertisements with partial deployment or
                 use the new attributes for full deployment.
          
          
          * Advertising TE protocols in IS-IS
                Presenter: Chris Bowers
                Document:
                https://datatracker.ietf.org/doc/draft-hegde-isis-advertising-te-protocols
             Raveendra Toriv: Is this multi-topology?
             Chris Bowers: SR and TE topologies are congruent. This is not
             multi-topology.
             Les: Hope we agree we are not modifying base SPF.
             Chris Bowers: Yes
             Harish Sitaraman: Why aren't admin groups a good long term solution?
             Chris Bowers: Requires configuration and prone to errors.
                           For example, a new link where you want to advertise
                           bandwidth.
             Hannes: Your draft assumes congruent topologies?
             Chris Bowers: Next draft addresses different attributes per application
                           with different topologies.
          
          * Ext. to IS-IS to Assoc. TE Attr. with TE Attr. Sets and SRLGs with
          SRLG Sets
             Presenter: Chris Bowers
             Document:
             https://datatracker.ietf.org/doc/draft-bowers-isis-te-attribute-set/
          
          * Resolve The Conflict
             Chris Hopps: Seems like encodings are different but the problems solved
                          are the same. Can IS-IS TE apps draft be used as a base
                          for consensus?
             Chris Bowers: Difference in requirements.
             Les: No way to say not to use legacy attributes. Do not have any
             standard
                  bit assignments. It is local configuration so how does the
                  controller know the mapping?
             Chris Bowers: Do you believe the first TE enablement draft can
             be adapted?
             Les: Not needed.
             Tony Przygienda: Need to agree on the set of requirements.
             Hannes Gredler: Can it be done using existing protocols? This could be
                             done using multi-topology?
             Les: Are you suggesting we use topologies for applications?
             Hannes: Yes
             Les: We are both scoping attributes in different ways.
             Hannes: But why not existing multi-topology?
             Acee: OSPF will not use multi-topology due to lack of deployment.
             Tony Przygienda: Have used multi-topology for other problems.
             Ron Bonica: Maybe we should have an interim on use cases and
                         requirements.
             Julien Meuric: Could allocate multi-topology code points for
                            various TE flavors.
          
          * IS-IS Routing with Reverse Metric
                  Presenter: Mikael Abrahamsson
                  Document:
                  https://datatracker.ietf.org/doc/draft-ietf-isis-reverse-metric
             Chris Hopps: If you have crappy signal on your fiber, you can
             advertise a
                  high reverse metric. This will greatly discourage usage but it
                  can be
                  still used in the other direction.
             Chris: Can we go to WG last call with this document? No objections
                    Think it is good idea? Support but not enthusiastic.
          
          * IS-IS Routing for Spine-Leaf Topology
                  Presenter: Les Ginsberg
                  Document:
                  https://datatracker.ietf.org/doc/draft-shen-isis-spine-leaf-ext/
             Chris Hopps: Cherry picked Russ' ideas from OpenFabric?
             Les: Yes, but with his permission.
          
          * ISIS Extensions for Flexible Ethernet
                  Presenter: Mach Chen
                  Document:
                  https://datatracker.ietf.org/doc/draft-zcdc-isis-flexe-extention/
             Julien Meuric: Discuss GMPLS extensions should be in TEAS and
             CCAMP. Need to
                            clearly define usecases for Flex Etherent and GMPLS.
          
          Ended exactly on time.
          
          



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