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Transatlantic Connectivity Initiatives for LHCONE: Implementation and Challenges

This presentation provides an overview of transatlantic connectivity initiatives for the LHCONE (LHC Open Network Environment) as discussed during the LHCONE meeting held on June 13, 2011, in Washington, DC. It highlights the agreed prototype implementation of LHCONE services utilizing existing resources from partners across the Atlantic. The presentation addresses the challenges of system design, multipoint connectivity, and resource allocation, while summarizing the current state of transatlantic links and future services aimed at enhancing scientific collaboration between North America and Europe.

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Transatlantic Connectivity Initiatives for LHCONE: Implementation and Challenges

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  1. Transatlantic Connectivityin LHCONE Artur Barczyk California Institute of Technology LHCONE Meeting Washington DC, June 13th, 2011

  2. Transatlantic Capacity for LHCONE • Agreed in Lyon that the prototype implementation will be done using existing resources, made available for that purpose by the partners • These resources have varying characteristics, and based on that could be used for implementing different LHCONE services • Challenge: build a system which is meaningful as initial LHCONE, which can be built out to scale without the need to redesign • These slides try to summarise the current state of discussion on the initial LHCONE deployment across the Atlantic

  3. initial implementation aka Prototype

  4. 3 Services, Brief Overview • (Context: Transatlantic Links) • Static point-to-point • Can be implemented, resources identified • Dynamic point-to-point • Future service • Several transatlantic links do or will support dynamic allocation • Multipoint-to-multipoint • First service to be deployed • Main focus of activity

  5. Transatlantic providers

  6. ACE • America Connects to Europe • NSF/IRNC funded project, 5 years, starting 2011 • First links expected in operation in August 2011 • Continues existing IRNC Chicago-Amsterdam link (Starlight-Netherlight) • Partners with GEANT in Europe for reciprocal capacity • ACE supports all scientific activity and applications between Europe and North America. • General Purpose, routed capacity • Circuit capacity (static and/or dynamic) • Currently foreseen links: • 2x10 Gbps for routed connectivity: NYC-Amsterdam & DC-Frankfurt • Could contribute best effort capacity • 10 Gbps for circuit services: Starlight-Netherlight • Available for circuit services (general, LHCONE and other projects)

  7. GEANT • DANTE managed capacity (foreseen): • 2x10 Gbps for routed connectivity: NYC-Amsterdam & DC-Frankfurt • Could contribute best effort capacity • 10 Gbps for circuit services: NYC-Paris (current) -> ?-? (foreseen) • Available for circuit services (LHCONE and other projects) • Other GEANT collaborators operate other transatlantic links, the use of these resources was not discussed

  8. US LHCNet • DOE/OHEP funded program • US LHCNet mission is to support US HEP research with focus on the LHC program • Provides CERN-BNL and CERN-FNAL links (LHCOPN) • In collaboration with ESnet • Provides capacity for Tier1-Tier2 transatlantic LHC data movement • Currently 6 x 10Gbps transatlantic links • Highly resilient configuration (Layer 1 mesh protection) • Flexible capacity partitioning • 4 x 10 Gbps allocated to Tier0 – Tier1 • US LHCNet can contribute dedicated capacity, also IDC-managed, to LHCONE

  9. Transatlantic Links Discussed for Initial Deployment Another GEANT TA link with capacity dedicated to LHCONE has been discussed, not shown here

  10. Multipoint Service with Dedicated Capacity; technical Using multiple providers of dedicated circuits; Ethernet LAG on both ends; Assuming NYC-Amsterdam “Any” number and combination of links and providersas long as they end on same pair of Ethernet devices

  11. Multipoint Service Challenges • (not just transatlantic) • Spanning Tree • Not good at large scale • Constrains topology, and the use of resources • -> no STP, design tree topology carefully • that’s what also PBB-TE does • Topology constraints remain • Broadcast Storms • Potentially dangerous in large Layer 2 networks • But LHCONE does connect routers, not end-hosts

  12. Multipath • The constraint of a tree topology will have to be overcome • Scalability • Resilience • Two standards in working, both have support in industry: • SPB (IEEE 802.1aq) • TRILL (IETF) • But will need to be also deployed at the Open Exchange Points • Time scale?

  13. Multipoint: What we have running today • Interconnected CERN and Caltech • CERNLight – NetherLight – MANLAN – StarLight • SURFnet: 10 Gbps GVA-AMS • USLHCNet: 5 Gbps AMS-NYC • USLHCNet: 5 Gbps NYC-CHI (temporary, see previous presentation) • AGLT2, MIT have vlan 3000 extended, waiting for green light to enable routing

  14. Summary • Point-to-point services • Static p2p: OK • Dynamic p2p: will be available in the future, dependency on terrestrial deployment • USLHCNet: ready (OSCARS based system deployed) • ACE: will be available in the future • Multipoint service • Work in progress, mainly on aggregation of circuits from USLHCNet and ACE • In the meantime, multipoint service across the Atlantic is provided by US LHCNet • With SURFnet/CERN in Europe

  15. Questions and discussion… http://lhcone.net Artur.Barczyk@cern.ch

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