000644532 001__ 644532 000644532 005__ 20260127210158.0 000644532 0247_ $$2doi$$a10.1051/epjconf/202533701260 000644532 0247_ $$2INSPIRETeX$$aAttebury:2025yda 000644532 0247_ $$2inspire$$ainspire:3065542 000644532 0247_ $$2ISSN$$a2100-014X 000644532 0247_ $$2ISSN$$a2101-6275 000644532 0247_ $$2datacite_doi$$a10.3204/PUBDB-2026-00390 000644532 037__ $$aPUBDB-2026-00390 000644532 041__ $$aEnglish 000644532 082__ $$a530 000644532 088__ $$2Fermilab$$aFERMILAB-CONF-25-0938-CSAID-ITD 000644532 1001_ $$aAttebury, Garhan$$b0 000644532 1112_ $$a27th International Conference on Computing in High Energy and Nuclear Physics$$cKrakow$$d2024-10-21 - 2024-10-25$$gCHEP 2024$$wPoland 000644532 245__ $$aTowards an IPv6-only WLCG: More successes in reducing IPv4 000644532 260__ $$aLes Ulis$$bEDP Sciences$$c2025 000644532 300__ $$a8 000644532 3367_ $$2ORCID$$aCONFERENCE_PAPER 000644532 3367_ $$033$$2EndNote$$aConference Paper 000644532 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$mjournal 000644532 3367_ $$2BibTeX$$aINPROCEEDINGS 000644532 3367_ $$2DRIVER$$aconferenceObject 000644532 3367_ $$2DataCite$$aOutput Types/Conference Paper 000644532 3367_ $$0PUB:(DE-HGF)8$$2PUB:(DE-HGF)$$aContribution to a conference proceedings$$bcontrib$$mcontrib$$s1769515940_1463581 000644532 520__ $$aThe Worldwide Large Hadron Collider Computing Grid (WLCG) community’s deployment of dual-stack IPv6/IPv4 on its worldwide storage infrastructure has been very successful. Dual-stack is not, however, a viable longterm solution; the HEPiX IPv6 Working Group has focused on studying where and why IPv4 is still being used, and how to flip such traffic to IPv6. The agreed end goal is to turn IPv4 off and run IPv6-only over the wide-area network to simplify both operations and security management.This paper reports our work since the CHEP2023 conference. Firstly, we present our campaign to deploy IPv6 on CPU services and Worker Nodes, with a deadline of end of June 2024. Then, the WLCG Data Challenge (DC24) performed in February 2024 was an excellent opportunity to observe the percentage of data transfers carried by IPv6. We observed the predominance of IPv6 in data transfers during DC24 and were able to understand yet more reasons for the use of IPv4 and areas for remedial action.The paper ends with the working group’s plans for moving WLCG to “IPv6- only”. One aspect of this is the possible automated use of IPv6-only clients configured with a customer-side translator, or CLAT, together with a deployment of NAT64 using what is often known as “IPv6-Mostly”, enabling IPv6-only sites to connect to non-WLCG IPv4-only services. 000644532 536__ $$0G:(DE-HGF)POF4-899$$a899 - ohne Topic (POF4-899)$$cPOF4-899$$fPOF IV$$x0 000644532 588__ $$aDataset connected to CrossRef, INSPIRE, Journals: bib-pubdb1.desy.de 000644532 693__ $$0EXP:(DE-MLZ)NOSPEC-20140101$$5EXP:(DE-MLZ)NOSPEC-20140101$$eNo specific instrument$$x0 000644532 7001_ $$aBabik, Marian$$b1 000644532 7001_ $$aBly, Martin$$b2 000644532 7001_ $$aBuraglio, Nick$$b3 000644532 7001_ $$aChown, Tim$$b4 000644532 7001_ $$aChristidis, Dimitrios$$b5 000644532 7001_ $$aChudoba, Jiři$$b6 000644532 7001_ $$aDeMar, Phil$$b7 000644532 7001_ $$aMolina, José Flix$$b8 000644532 7001_ $$aGrigoras, Costin$$b9 000644532 7001_ $$aHoeft, Bruno$$b10 000644532 7001_ $$aIto, Hiro$$b11 000644532 7001_ $$0P:(DE-HGF)0$$aKelsey, David$$b12$$eCorresponding author 000644532 7001_ $$aMartelli, Edoardo$$b13 000644532 7001_ $$aMcKee, Shawn$$b14 000644532 7001_ $$aMoreira, Carmen Misa$$b15 000644532 7001_ $$aNandakumar, Raja$$b16 000644532 7001_ $$0P:(DE-H253)PIP1001902$$aOhrenberg, Kars$$b17 000644532 7001_ $$aPrelz, Francesco$$b18 000644532 7001_ $$aRand, Duncan$$b19 000644532 7001_ $$aSciabà, Andrea$$b20 000644532 7001_ $$aSkirvin, Tim$$b21 000644532 7001_ $$aWalker, Christopher$$b22 000644532 773__ $$0PERI:(DE-600)2595425-8$$a10.1051/epjconf/202533701260$$gVol. 337, p. 01260 -$$p01260 -$$tThe European physical journal / Web of Conferences$$v337$$x2100-014X$$y2025 000644532 8564_ $$uhttps://bib-pubdb1.desy.de/record/644532/files/epjconf_chep2025_01260.pdf$$yOpenAccess 000644532 8564_ $$uhttps://bib-pubdb1.desy.de/record/644532/files/epjconf_chep2025_01260.pdf?subformat=pdfa$$xpdfa$$yOpenAccess 000644532 909CO $$ooai:bib-pubdb1.desy.de:644532$$popenaire$$popen_access$$pVDB$$pdriver$$pdnbdelivery 000644532 9101_ $$0I:(DE-588b)2008985-5$$6P:(DE-H253)PIP1001902$$aDeutsches Elektronen-Synchrotron$$b17$$kDESY 000644532 9131_ $$0G:(DE-HGF)POF4-899$$1G:(DE-HGF)POF4-890$$2G:(DE-HGF)POF4-800$$3G:(DE-HGF)POF4$$4G:(DE-HGF)POF$$aDE-HGF$$bProgrammungebundene Forschung$$lohne Programm$$vohne Topic$$x0 000644532 9141_ $$y2025 000644532 915__ $$0StatID:(DE-HGF)0200$$2StatID$$aDBCoverage$$bSCOPUS$$d2024-12-16 000644532 915__ $$0LIC:(DE-HGF)CCBY4$$2HGFVOC$$aCreative Commons Attribution CC BY 4.0 000644532 915__ $$0StatID:(DE-HGF)0501$$2StatID$$aDBCoverage$$bDOAJ Seal$$d2022-08-02T14:13:25Z 000644532 915__ $$0StatID:(DE-HGF)0500$$2StatID$$aDBCoverage$$bDOAJ$$d2022-08-02T14:13:25Z 000644532 915__ $$0StatID:(DE-HGF)0510$$2StatID$$aOpenAccess 000644532 915__ $$0StatID:(DE-HGF)0030$$2StatID$$aPeer Review$$bDOAJ : Anonymous peer review$$d2022-08-02T14:13:25Z 000644532 915__ $$0StatID:(DE-HGF)0300$$2StatID$$aDBCoverage$$bMedline$$d2024-12-16 000644532 9201_ $$0I:(DE-H253)IT-20120731$$kIT$$lInformationstechnologie$$x0 000644532 980__ $$acontrib 000644532 980__ $$aVDB 000644532 980__ $$aUNRESTRICTED 000644532 980__ $$ajournal 000644532 980__ $$aI:(DE-H253)IT-20120731 000644532 9801_ $$aFullTexts