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@INPROCEEDINGS{Attebury:644532,
      author       = {Attebury, Garhan and Babik, Marian and Bly, Martin and
                      Buraglio, Nick and Chown, Tim and Christidis, Dimitrios and
                      Chudoba, Jiři and DeMar, Phil and Molina, José Flix and
                      Grigoras, Costin and Hoeft, Bruno and Ito, Hiro and Kelsey,
                      David and Martelli, Edoardo and McKee, Shawn and Moreira,
                      Carmen Misa and Nandakumar, Raja and Ohrenberg, Kars and
                      Prelz, Francesco and Rand, Duncan and Sciabà, Andrea and
                      Skirvin, Tim and Walker, Christopher},
      title        = {{T}owards an {IP}v6-only {WLCG}: {M}ore successes in
                      reducing {IP}v4},
      journal      = {The European physical journal / Web of Conferences},
      volume       = {337},
      issn         = {2100-014X},
      address      = {Les Ulis},
      publisher    = {EDP Sciences},
      reportid     = {PUBDB-2026-00390, FERMILAB-CONF-25-0938-CSAID-ITD},
      pages        = {01260 -},
      year         = {2025},
      abstract     = {The Worldwide Large Hadron Collider Computing Grid (WLCG)
                      community’s deployment of dual-stack IPv6/IPv4 on its
                      worldwide storage infrastructure has been very successful.
                      Dual-stack is not, however, a viable longterm solution; the
                      HEPiX IPv6 Working Group has focused on studying where and
                      why IPv4 is still being used, and how to flip such traffic
                      to IPv6. The agreed end goal is to turn IPv4 off and run
                      IPv6-only over the wide-area network to simplify both
                      operations and security management.This paper reports our
                      work since the CHEP2023 conference. Firstly, we present our
                      campaign to deploy IPv6 on CPU services and Worker Nodes,
                      with a deadline of end of June 2024. Then, the WLCG Data
                      Challenge (DC24) performed in February 2024 was an excellent
                      opportunity to observe the percentage of data transfers
                      carried by IPv6. We observed the predominance of IPv6 in
                      data transfers during DC24 and were able to understand yet
                      more reasons for the use of IPv4 and areas for remedial
                      action.The paper ends with the working group’s plans for
                      moving WLCG to “IPv6- only”. One aspect of this is the
                      possible automated use of IPv6-only clients configured with
                      a customer-side translator, or CLAT, together with a
                      deployment of NAT64 using what is often known as
                      “IPv6-Mostly”, enabling IPv6-only sites to connect to
                      non-WLCG IPv4-only services.},
      month         = {Oct},
      date          = {2024-10-21},
      organization  = {27th International Conference on
                       Computing in High Energy and Nuclear
                       Physics, Krakow (Poland), 21 Oct 2024 -
                       25 Oct 2024},
      cin          = {IT},
      ddc          = {530},
      cid          = {I:(DE-H253)IT-20120731},
      pnm          = {899 - ohne Topic (POF4-899)},
      pid          = {G:(DE-HGF)POF4-899},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)16 / PUB:(DE-HGF)8},
      doi          = {10.1051/epjconf/202533701260},
      url          = {https://bib-pubdb1.desy.de/record/644532},
}