Abstract
The fraction of general internet traffic carried over IPv6 continues to grow rapidly. The transition of WLCG central and storage services to dual-stack IPv4/IPv6 is progressing well, thus enabling the use of IPv6-only CPU resources as agreed by the WLCG Management Board and presented by us at CHEP2016. By April 2018, all WLCG Tier-1 data centres should have provided access to their services over IPv6. The LHC experiments have requested all WLCG Tier-2 centres to provide dual-stack access to their storage by the end of LHC Run 2. This paper reviews the status of IPv6 deployment in WLCG.
Highlights
The HEPiX IPv6 Working Group [1] has been investigating the many issues involved in the deployment and use of IPv6 in HEP in general and in WLCG
This increased traffic began to saturate CERN’s IPv6 firewall, so in June 2018 a firewall bypass was deployed for IPv6, thereby allowing the activation of dual stack access for the ATLAS and CMS EOS instances
A ticketing campaign via GGUS was launched in November 2017, targeting all WLCG Tier-2 sites managed by EGI, while for OSG sites the coordination for the IPv6 deployment was delegated to OSG operations
Summary
The HEPiX IPv6 Working Group [1] has been investigating the many issues involved in the deployment and use of IPv6 in HEP in general and in WLCG. The group’s paper at CHEP2016 [2] presented the status of the work to allow sites to deploy IPv6-only CPU resources. Driven by the requirements of the LHC experiments, the WLCG Management Board, in September 2016, had approved the requirement that all WLCG Tier-2. Since the group has worked with others to encourage, support and monitor that transition and to identify and help solve any technical issues as they arise
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