T0-T1 Networking Meeting 16th June Meeting David Foster Cambridge LHC T0-T1 Meeting, Cambridge, June 2006

Current State We have had a number of meetings and agreed on an overall approach with many open questions. Some results have been published http://lcg.web.cern.ch/LCG/activities/networking/nw-grp.html And we have a wiki site for gathering operational information – important outcome of these meetings. https://uimon.cern.ch/twiki/bin/view/LHCOPN/WebHome As we move more and more towards providing an production infrastructure needed for service challenges in 2006, many basic issues still remain. LHC T0-T1 Meeting, Cambridge, June 2006

Key Dates in 2006 31st March. 6 Tier-1’s (3 via Geant) with their final links. We did not quite achieve this milestone. 30th April. SC4 Setup 31st May. SC4 Stable Service 30th September. End SC4/Start Initial LHC Service 1) 8 Tier-1s and 20 Tier-2s must have demonstrated availability better than 90% of the levels specified in Annex 3 of the WLCG MoU [adjusted for sites that do not provide a 24 hour service] 2) Success rate of standard application test jobs greater than 90% (excluding failures due to the applications environment and non-availability of sites) 3) Performance and throughput tests complete: Performance goal for each Tier-1 is the nominal data rate that the centre must sustain during LHC operation: CERN-disk > network > Tier-1-tape. Throughput test goal is to maintain for one week an average throughput of 1.6 GB/s from disk at CERN to tape at the Tier-1 sites. All Tier-1 sites must participate. LHC T0-T1 Meeting, Cambridge, June 2006

Todays Meeting The purpose of todays meeting is to focus on the problems of resiliance as agreed at the Rome meeting. We have primary circuits well defined. We can purchase physically diverse backup circuits Done for the US Possible on the GEANT footprint Other initiatives bring opportunities GLIF, Cross Border Fiber We need to converge on a layer-3 design that allows the re-direction of traffic in case of failure that utilises the available L1/L2 infrastructure as appropriate. Need to understand the level of service this will provide also. The questions to be answered are: Can we identify for each primary link failure where the traffic will flow? Do we have a necessary and sufficient L3 design? What circuits can be considered as available and configured into the OPN? What additional circuits should be provisioned? LHC T0-T1 Meeting, Cambridge, June 2006

Circuits – 2007 View LHC T0-T1 Meeting, Cambridge, June 2006 Number Source Destination Service Provider Capacity 1 CERN IN2P3 Dedicated RENATER 10Gbit 2 Netherlight GN2 3 4 SARA 5 FZK 6 PIC 7 NDGF 8 CNAF 9 RAL 10 Manlan Commercial <10GBit 11 Starlight <10Gbit 12 ASGC 13 TRIUMF CANARIE 14 GridKa DFN/SWITCH 10 Gbit To be discussed!!! 15 DFN/SWITCH/GARR Now 16 DFN/RENATER Q4 2006 17 DFN/SURFNET Q2 2006 18 SURFNET/NORDUNET 10 GBit LHC T0-T1 Meeting, Cambridge, June 2006

T1 – 2007 View LHC T0-T1 Meeting, Cambridge, June 2006 Source Destination Primary Primary e2e Capacity Alternate Alternate Provider Alternate e2e capacity CERN IN2P3 1 10Gbit ASGC 2,12 TRIUMF 3,13 SARA 4 FZK 5 PIC 6 NDGF 7 CNAF 8 RAL 9 BNL 10, EsNet <10GBit FNAL 11, EsNet <10Gbit LHC T0-T1 Meeting, Cambridge, June 2006

Conclusions From April 2006 T1-T1 requirements becoming better understood and will be an issue. Lots of new initiatives, do we have a complete overview? Need to now discuss in much more detail the issue of the operational schedule, planned/unplanned outages and backup strategies including CBF. Routing Document produced and on Twiki. NOC information on the Twiki. But clearly not 24x7. Need a meeting dedicated to this. No T1-T1 traffic but not excluded. Basic ACL monitoring in place. Allowed IP addresses in the RIPE database. Need: BGP on all sites. Operations ENOC model and integration with NREN’s and DANTE will continue. Dante deploying Perfsonar and integrate with ESNet, Canarie and Taiwan. Plan to report on the experience at next OPN meeting Security Document has been produced. Robin to liaise and agree with site security officers. Report on feedback at the next meeting. Monitoring Document has been produced and published. PerfSONAR will provide the basic level-1 monitoring. T1 volunteers for prototype monitoring tests. Need to demonstrate value through volunteers. Will try and use this for demonstration purposed. Piggyback on the perfsonar activity, but get more information? Site Reports Campus Status US Labs complete both have redundant 10G paths IN2P3, NDGF, RAL, TRIUMF Complete but backup unclear SARA,CNAF,FZK complete, Backup via CBF with each other. ASGC Complete, Backup via US (in 2007). T2’s will have 10G links. PIC ? Next meetings Next to be end June16th. Progress reports on the above topics. LHC T0-T1 Meeting, Cambridge, June 2006