HEPiX IPv6 Working Group - in person at CERN - dates now confirmed

Session

Session 1

21 May 2025, 14:00

513/1-024 (CERN)

1. Welcome, agenda, note taker(s)

21/05/2025, 14:00

24. General news

David Kelsey (Science and Technology Facilities Council STFC (GB)), Edoardo Martelli (CERN)

21/05/2025, 14:05

Anything to be shared or discussed?
News from Manchester LHCOPN/LHCONE meeting (March 2025) relating to IPv6

3. Status of the CPU services ticket campaign

Dr Andrea Sciabà (CERN)

21/05/2025, 14:15

37. Data transfers still using IPv4 and how to flip to IPv6

Bruno Heinrich Hoeft (KIT - Karlsruhe Institute of Technology (DE)), David Kelsey (Science and Technology Facilities Council STFC (GB)), Edoardo Martelli (CERN)

21/05/2025, 14:50

Discussion
Is monitoring of V4 versus V6 now complete and reliable?

What is recent IPv6 percentage on LHCOPN?
And same on LHCONE?

Perhaps look now at Top IPv4-talkers on LHCOPN?
particularly interested in USA/Canada LHCOPN links (BNL, FNAL, TRIUMF) for agenda item later today

26. Plans and timetable for IPv6-only

David Kelsey (Science and Technology Facilities Council STFC (GB))

21/05/2025, 16:00

Discussion by all. DaveK may not be available and/or not prepared!

Discuss timetable for removal of IPv4 on data transfers.
Well before start of LH-LHC Run4

What about moving to IPv6-only Workernodes and WLCG clients?

When can we remove IPv4 from WLCG storage services? We often said that this would be the last to go.

21. Update from USA/ESnet

21/05/2025, 16:30

Could include news from US-ATLAS & BNL
and US-CMS & FNAL

There is a proposal from ESnet (from recent meeting with US-ATLAS & US-CMS) to turn off IPv4 on LHCOPN between CERN and USA.

Start with this proposal (Shawn McKee? and/or Dale Carder?)

Not just data transfer traffic between CERN (Tier0) and the two Tier1s... But also traffic between US Tier1s and other Tier1 around the...

31. Roundtable news/updates from Sites - or delay to next day?

21/05/2025, 17:30