Notes by D Kelsey
Present: Catalin Condurache, Bruno Hoeft, David Kelsey, Edoardo Martelli (arrived late), Francesco Prelz, Duncan Rand, Andrea Sciaba, Tim Skirvin (FNAL)
Apologies: Edoardo Martelli (will be late), Kars Ohrenberg, Pepe Flix
Dave started the meeting by welcoming Tim Skirvin from FNAL.
Francesco P: No news. Still waiting for Turin to deploy.
Catalin C: No news.
Bruno H: No news - will send Francesco a network dataset for traffic analysis.
Tim S: FNAL now working on lots of dual-stack upgrades. Many services have been done now working on worker nodes.
Edoaordo M: Nothing to report. The connection with MS Azure cloud is stopping. Frnafurt already gone; Amsterdam next year.
Duncan R: no news.
Andrea S reports that there have been no new Tier2 deployments.
We dicussed IPv4 transfers on LHCOPN - when both ends seem to be IPv6 capable. Why? Bruno H noted that the IPv6 traffic inbound to KIT or 30-50 Gbps, whereas IPv4 is in range 0-15 Gbps. But there are 30 Gbps IPv4 peaks outbound from KIT. Bruno will try to understand reasons.
Duncan asked what news there is of any WLCG data centres planning to move to IPv6-only. Edoardo M notes that the situation re the new Data Centre at CERN (2024-25) is still not certain - possible that this will be IPv6-only on the external boundary.
We agreed not to submit to ISGC2022 as not much news to report since last years talk.
We discussed possible agenda items, including a discussion on whether to mount an upgrade (ticket) campaign for dual-stack WNs (or a survey or broadcast).
Next meeting: Tues/Wed 18/19 January 2022 (15:00 - 18:00 CET both days)