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IETF-103 lwig minutes

Session 2018-11-07 1120-1220: Meeting 2 - Audio stream - lwig chatroom

Minutes

minutes-103-lwig-00 minutes



          Wednesday November 7, 2018
          LWIG Session at IETF103
          Room: Meeting 2
          Time: 11:20 - 12:20
          Chairs: Mohit Sethi, Zhen Cao (absent)
          
          Note takers: Lijo Thomas, Ari Keränen
          
          Co-chair updates the working group status since IETF102
          Suresh, AD : lwig cellular-6 , normative reference and informational
          reference to be updated , moving to next level
          Co-chair : Needs to push at the earliest , and let the authors decide
          the progress
          Ari: as co-author, can keep it wait for more time, make sense because RD
          last call is soon started, if it goes longer, wait and check the status
          and update the references if needed.
          Peter : not anymore pessimistic about RD, interop coming so that
          interoperability issues can be addressed
          
          Co-chair : presented the agenda for todays meeting
          
          
          # Lwig-tcp-constrained node-netowrks -04 (Carles)
          
          Ilpo Järvinen: will read the draft and come up with more comments
          Markku : will review the draft, single MSS issue if delayd ACKs off. When
          the data packet arrives, immediately ack , needs to be more clear,
          unnecessary ACK needs to fixed. With request / response traffic you
          immediately ack and send response. With delayed ACK would piggyback. Not
          clear if it is advisable to turn it off.
          Removed OpenWSN since mostly based on MicroTCP.
          Rahul : RIOT option. Hard to convince my people that lwIP can fit to
          40kB. Is it possible to push the references to open source with lwig
          github
          Carles : Need to check the sources and get back
          Rahul: people are using this now for comparison. Need to have good
          sources. Not sure if LWIG github is the right place.
          Mohit: for the crypto comparison draft got lots of questions on how are
          these compiled to code. configuration for open source so that more people
          can use and check , a personal github, or lwig github
          Carles: some data corresponds to data from different platforms. Difficult
          to have fair comparison. Can try to make sure that references and sources
          are reflecting what is intended. The code sizes are not measured by
          us. From academic papers, from RIOT developers, etc. Have problem with
          heterogeneity.
          Mohit : as per the reference ,  lwip 2.0 all protocol stack on embed,
          how you verify the 40 KB , is it more reliable source ?
          Carles: we didn't do measurements but based on information from other
          references.
          Carles : WGLC ?
          MOhit : markku, ilpo and rahul comments to be addressed and wait for
          next revision to go for WG LC
          
          
          # Neighbor management policy (Rahul Jadhav)
          
          Rahul : Neighbor management policy presentation, how  do u manage a
          neighbor cache in a 6lowpan, reservation and signaling recommendation for
          neighbor cache is addressed in the draft, and establish a stable network,
          Mohit: dont u have the neighbor cache entry with signal entry received,
          a specific signal modeling with your application,
          Rahul : have a application in place, it may be difficult to do the signal
          based network cache,
          Mohit : not sure about 6lowpan problem, but make it clear specify with
          your application and need not be generic
          
          
          # Fragment forwarding vs per Hop reassembly presentation (Rahul Jadhav)
          
          Carsten: random delay is application delay?
          Rahul: in addition to application delay added a random delay
          Carsten: what causes the numbers for MAC transmit failures?
          Rahul: lots of failures with fragment forwarding; we need to check what
          causes the failure in more granular level
          Carsten: interesting result, requires some diagnostic work to find out
          where it is there
          Mohit: hope to see a presentation on that next time
          
          
          # Security classes for Software updates for IoT (Pascal Urien)
          
          18 different classes identified based on set of available security
          functionality (available bootloader, OTP, tamper-resistant keys, etc.).
          
          Sometimes easy to re-flash bootloader. That will result in less strong
          security than one-time programmable memory. If there's no permanent
          memory on device, that can be re-flashed in supply chain process,
          resulting in attacks.
          
          No way today to securely compute keys by software only. Need tamper
          resistant keys.
          
          (ran out of time; no time for Q&A)
          
          
          # Alternative Elliptic Curve Representations (Rene Struik)
          
          Rene presented current status (slide #4).
          
          Draft is actually very simple, most of it is tutorial style to the
          topic. Looking forward to more feedback. Also implementation experiences.
          
          For reviews look at mostly the non-appendix parts of the draft.
          Mohit: need to close meeting, looking for group to provide feedback.
          Carsten: thank you Rene (for doing this)!
          Mohit: need a few more reviews to progress the document.
          
          (meeting adjourned)
          
          



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