EDP Sciences : Overcoming obstacles to IPv6 on WLCG

Babik, Marian; Molina, José Flix; Hoeft, Bruno; DeMar, Phil; Rand, Duncan; Christidis, Dimitrios; Grigoras, Costin; Moreira, Carmen Misa; Ohrenberg, Kars; Ito, Hiro; Kelsey, David; Martelli, Edoardo; Buraglio, Nick; Skirvin, Tim; Chown, Tim; Sciabà, Andrea; Prelz, Francesco; Nandakumar, Raja; Chudoba, Jiri; McKee, Shawn; Bly, Martin

doi:10.1051/epjconf/202429507036

Article
Report number	FERMILAB-CONF-22-902-SCD
Title	Overcoming obstacles to IPv6 on WLCG
Author(s)	Babik, Marian (CERN) ; Bly, Martin (Rutherford) ; Buraglio, Nick (LBL, Berkeley) ; Chown, Tim (JISC) ; Christidis, Dimitrios (CERN) ; Chudoba, Jiri (Prague, Inst. Phys.) ; DeMar, Phil (Fermilab) ; Molina, José Flix (Madrid, CIEMAT) ; Grigoras, Costin (CERN) ; Hoeft, Bruno (KIT, Karlsruhe) ; Ito, Hiro (Brookhaven Natl. Lab.) ; Kelsey, David (Rutherford) ; Martelli, Edoardo (CERN) ; McKee, Shawn (Michigan U.) ; Moreira, Carmen Misa (CERN) ; Nandakumar, Raja (Rutherford) ; Ohrenberg, Kars (DESY) ; Prelz, Francesco (INFN, Milan) ; Rand, Duncan (Imperial Coll., London) ; Sciabà, Andrea (CERN) ; Skirvin, Tim (Fermilab)
Publication	2024
Number of pages	9
In:	EPJ Web Conf. 295 (2024) 07036
In:	26th International Conference on Computing in High Energy & Nuclear Physics, Norfolk, Virginia, Us, 8 - 12 May 2023, pp.07036
DOI	10.1051/epjconf/202429507036
Subject category	Particle Physics - Phenomenology ; Particle Physics - Theory ; Particle Physics - Experiment
Abstract	The transition of the Worldwide Large Hadron Collider Computing Grid (WLCG) storage services to dual-stack IPv6/IPv4 is almost complete; all Tier-1 and 94% of Tier-2 storage are IPv6 enabled. While most data transfers now use IPv6, a significant number of IPv4 transfers still occur even when both endpoints support IPv6. This paper presents the ongoing efforts of the HEPiX IPv6 working group to steer WLCG toward IPv6-only services by investigating and fixing the obstacles to the use of IPv6 and identifying cases where IPv4 is used when IPv6 is available. Removing IPv4 use is essential for the long-term agreed goal of IPv6-only access to resources within WLCG, thus eliminating the complexity and security concerns associated with dual-stack services. We present our achievements and ongoing challenges as we navigate the final stages of the transition from IPv4 to IPv6 within WLCG.
Copyright/License	publication: © The authors CC-BY-4.0