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    HEPiX IPv6 Working Group - in person at CERN - dates now confirmed

    21–22 May 2025
    CERN
    Europe/Zurich timezone

    Contribution List

    12 out of 12 displayed
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    1. 1. Welcome, agenda, note taker(s)
      21/05/2025, 14:00
    2. 24. General news
      David Kelsey (Science and Technology Facilities Council STFC (GB)), Edoardo Martelli (CERN)
      21/05/2025, 14:05

      Anything to be shared or discussed?
      News from Manchester LHCOPN/LHCONE meeting (March 2025) relating to IPv6

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    3. 3. Status of the CPU services ticket campaign
      Dr Andrea Sciabà (CERN)
      21/05/2025, 14:15
    4. 37. Data transfers still using IPv4 and how to flip to IPv6
      Bruno Heinrich Hoeft (KIT - Karlsruhe Institute of Technology (DE)), David Kelsey (Science and Technology Facilities Council STFC (GB)), Edoardo Martelli (CERN)
      21/05/2025, 14:50

      Discussion
      Is monitoring of V4 versus V6 now complete and reliable?

      What is recent IPv6 percentage on LHCOPN?
      And same on LHCONE?

      Perhaps look now at Top IPv4-talkers on LHCOPN?
      particularly interested in USA/Canada LHCOPN links (BNL, FNAL, TRIUMF) for agenda item later today

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    5. 26. Plans and timetable for IPv6-only
      David Kelsey (Science and Technology Facilities Council STFC (GB))
      21/05/2025, 16:00

      Discussion by all. DaveK may not be available and/or not prepared!

      Discuss timetable for removal of IPv4 on data transfers.
      Well before start of LH-LHC Run4

      What about moving to IPv6-only Workernodes and WLCG clients?

      When can we remove IPv4 from WLCG storage services? We often said that this would be the last to go.

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    6. 21. Update from USA/ESnet
      21/05/2025, 16:30

      Could include news from US-ATLAS & BNL
      and US-CMS & FNAL

      There is a proposal from ESnet (from recent meeting with US-ATLAS & US-CMS) to turn off IPv4 on LHCOPN between CERN and USA.

      Start with this proposal (Shawn McKee? and/or Dale Carder?)

      Not just data transfer traffic between CERN (Tier0) and the two Tier1s... But also traffic between US Tier1s and other Tier1 around the...

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    7. 31. Roundtable news/updates from Sites - or delay to next day?
      21/05/2025, 17:30
    8. 34. Roundtable news/updates from Experiments
      22/05/2025, 09:30

      And also sites if not covered yesterday

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    9. 38. Updates from perfSONAR, RNTWG/SciTags etc - Replace by paper for Oct 2025 LHCOPN meeting?
      22/05/2025, 10:00

      No talk confirmed - usual speakers not registered

      LHCOPN meeting in Karlsruhe - Oct 2025.
      We need to draft a paper proposing removal of IPv4 peering on LHCOPN.
      And what about on LHCONE as well?
      A good time to discuss/agree what needs to be in the paper - agree sections and table of contents now?

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    10. 35. Upcoming conferences and other presentations - so could continue discussion of timetable for IPv6-only deployment
      22/05/2025, 10:30

      Not aware of anything close - conferences - but is there?

      Discuss timetable for removal of IPv4 on data transfers.
      What about moving to IPv6-only Workernodes and WLCG clients?
      When can we remove IPv4 from WLCG storage services? We often said that this would be the last to go.

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    11. 32. Other issues to discuss?
      22/05/2025, 11:30

      All discuss

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    12. 36. AOB, Dates of next meetings
      22/05/2025, 12:00

      Next in person meeting. Would be useful to meet again before the LHCOPN/LHCONE meeting in Karlsruhe (October).

      So perhaps we can meet at CERN in September 2025? Or would a meeting same week as LHCOPN meeting in Karlsruhe work?

      Next meeting after that for a meeting away from CERN - if we do not decide to meet in KIT in October.

      One date that would work for DaveK - at CERN - ...

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