HEPiX IPv6 working group meeting

Tuesday 10 Oct 2023, 15:00 → 16:00 Europe/Zurich

Zoom

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

Please note the unusual day of week and unusual time.

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Meeting of the HEPiX IPv6 Working Group

10 Oct 2023 starting at 15:00 CEST (1 hour Zoom)

Agenda:  https://indico.cern.ch/event/1335077/

Present: MartinB,  DaveK,  TimC,  AndreaS,  Carmen, Costin, EdoardoM, FrancescoP, Raja, Duncan, NickB, Dimitrios, Bruno, ChrisW, AlastairD

1. Agenda was agreed - main item is to prepare for presentation to the WLCG MB on 17th Oct 2023.
2. Alastair Dewhurst, Tier-1 Manager at RAL, first raised an issue of AOB.  After lots of reconfiguration of the Tier-1 network at RAL, they are now peering with IPv6 over LHCONE from the new network.  They have been testing connectivity with other sites across LHCONE and observe problems with IPv6 on the new Tier-1 network whereas it did work on the old network.  Short discussion highlighted possible issues with firewalls blocking ICMP Ping. Having made contact with some other Tier-1 it was agreed that this would be further investigated outside of this meeting. (note added later - and was fixed).
3. New ticket campaign for sites to deploy dual-stack CPU (services, Compute Elements, and client worker nodes).  AndreaS has an agenda item to present this at the WLCG Managment Board meeting on 17 Oct 2023. (DaveK will be in Canada for the HEPiX meeting on that day - Victoria BC).  Each of the experiments spoke (Andrea CMS, Dimitrios ATLAS, Costin ALICE and Raja LHCb and also DUNE).  All experiments support this new campaign and the rest of this meeting discussed the content of the slides Andrea will show to the MB meeting.
4. Note added after the WLCG MB meeting.  The new ticket campaign for deploying dual-stack CPU was approved by the Management Board. We will discuss and agree final details during our London meeting on 22/23 November 2023
5. We ran out of time - no real discussion of the London meeting or the talk at HEPiX - these topics were followed up via email

15:00 → 15:05 Introduction and agenda

15:05 → 15:25 Prepare for WLCG MB meeting - ticket campaign for dual-stack on all services and clients

15:25 → 15:40 Plans for next in person meeting in London

Proposal:
Travel Monday 20 November 2023 (if attending UK IPv6 Council meeting)
Tuesday 21st Nov (all day) optional attendance at UK IPv6 Council meeting
Wednesday morning 22nd Nov- at Jisc offices in Fetter Lane - discussion of UK specific issues (but of interest to WLCG and others). Wednesday afternoon 22nd Nov and Thursday morning 23rd Nov. Our traditional 2-day meeting again hosted by Jisc.
End at lunchtime on Thursday 23rd Nov - allow some people to travel home during that afternoon and evening.

15:40 → 15:55 Talk to HEPiX next week

Ensuring Use of IPv6 after it is deployed

The HEPiX IPv6 working group has been chasing the deployment of dual-stack IPv6/IPv4 storage services in WLCG for nearly 6 years. Finally, the deployment is essentially complete with more than 97% of all LHC experiment Tier-2 storage services now IPv6-capable. There is, however, still substantial use of the legacy IPv4 protocols. The group has been identifying obstacles to the use of IPv6 and has successfully fixed many of the problems. The agreed endpoint of the IPv6 transition remains the move of all WLCG services to IPv6-only within the next few years. This talk will present all the work done and show our plans for the move to IPv6-only

15:55 → 16:00 AOB