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Managed Bandwidth Next Generation

This paper presents the objectives and recent findings from the Managed Bandwidth Next Generation (MB-NG) project held at UCL's Networkshop 2003. Focused on implementing practical Quality of Service (QoS) test beds across the UK, our research aimed to facilitate high-bandwidth data transfers and integrate QoS provisions into middleware for applications. Key activities included performance testing of network devices, characterizing end-to-end network performance, and investigating TCP improvements. Future work will extend QoS practices and middleware integration to enhance multi-domain networking services.

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Managed Bandwidth Next Generation

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  1. Managed Bandwidth Next Generation F. Saka UCL NETSYS (NETwork SYStems centre of excellence) Networkshop 2003

  2. Outline Overview of project goals Recent findings Future activities Conclusion Networkshop 2003

  3. Project goals • Implement Practical QoS Test-beds in the UK. • Multi-domain • MPLS in the core • Diffserv at the edges • Allowing Applications to use QoS enabled Internet via a Middleware • High bandwidth data transfers • End-to-End network services to Europe and US Networkshop 2003

  4. Industrial and research partners • MB-NG (http://www.mb-ng.net) • Academic partners: UCL, Manchester, Southampton, RAL, Cambridge, Lancaster. • Industrial partners: Cisco, Spirent and Acterna, UKERNA & ULCC. • Significant support and interest! Networkshop 2003

  5. The MB-NG network RAL SuperJANET UCL Manchester Best Effort Networkshop 2003

  6. The QoS enabled MB-NG network RAL RAL Static SLAs SuperJANET SuperJANET Static SLAs Static SLAs MPLS UCL UCL Manchester Manchester Allowing user access Dynamic SLAs Dynamic SLAs QoS Networkshop 2003

  7. WAN: MAN - LON - RAL MAN 2.5 Gbit/s 1.0 Gbit/s UKERNA Wcom: 12416 GE-WAN OC-48 POS 7609 7609 Wcom: 12416 UCL RAL 7609 7609 OC-48 POS GE-WAN GE-WAN OC-48 POS Wcom: 12416 7609 7609 ULCC: 12016 2 x GE 1 x GE • We are interested in: 12000 GSR: OC48 POS interfaces • 7600 OSR: Gigabit Ethernet and OC48 POS interfaces Networkshop 2003

  8. Recent Activities • UK testbed deployment • Single device characterization and interoperability • GSR 12000 series • Testing Engine 2 and Engine 3 OC48-POS (2.5 Gbit/s) • OSR 7600 series • Testing OC48-POS (2.5 Gbit/s) and Gigabit Ethernet (1.0 Gbit/s) • Characterising end-to-end network performance. • Testing high bandwidth protocols (High-Speed TCP) Networkshop 2003

  9. Testing GSR (12016) Performance GSR chassis with two OC-48 POS line cards Engine 2 & Engine 3 Adtech AX4000 tester from Spirent OC-48 POS GSR AX4000 OC-48 POS • We want to know the performance of: Engine2 Engine2 Engine2  Engine3 Engine3 Engine2 Networkshop 2003

  10. GSR results Throughput Latency Networkshop 2003

  11. Testing OSR (7609) Performance 7609 chassis with one OC48 POS line card and GE-WAN cards Adtech AX4000 from Spirent GE GE AX4000 GE 7609 OC48 POS • We want to know the performance of: GE OC48 Networkshop 2003

  12. OSR results Throughput Latency Networkshop 2003

  13. WAN: Manchester – London 3 flows. UCL to Manchester 2 Best Effort, 1 Less Than Best Effort (LBE) MAN UKERNA GE-WAN Wcom: 12416 OC48 POS Policy applied here 89% BE and 10% LBE 7609 7609 Wcom: 12416 UCL PCs 7609 GE-WAN OC48 POS GE GE ULCC: 12016 GE 7609 1 x GE PCs Networkshop 2003

  14. UCL->Manchester test results From UCL to Manchester Tests: Frame Size : 1500 Bytes Three UDP flows: 2BE + LBE Policy: 89% BE 10% LBE Load vs. rcv Throughput Load vs. packet loss Networkshop 2003

  15. Router notes for QoS Networkshop 2003

  16. TCP Improvement • High-Speed TCP and variants • High Speed TCP: S. Floyd http://www.icir.org/floyd/hstcp.html • Scalable TCP: T. Kelly http://www-lce.eng.cam.ac.uk/~ctk21/scalable/ • FAST: S. Low http://netlab.caltech.edu/FAST/ • Basic idea is to change the behaviour in Congestion avoidance • Reduce the decrease parameter compared to normal TCP • Increase the increase parameter compared to normal TCP Networkshop 2003

  17. TCP performance • Linux Kernel 2.4.19 • Through MB-NG network (6ms RTT) • Gigabit Ethernet (Intel e1000) • Courtesy of Yee-Ting Li (UCL) Networkshop 2003

  18. 24 Hours High-Speed TCP mem-mem • UCL -> Manchester • Tx 64 Tx-abs 64 • Rx 64 Rx-abs 128 • 941.5 Mbit/s +- 0.5 Mbit/s • Courtesy of R. Hughes-Jones (Manchester) Networkshop 2003

  19. Gridftp Throughput • Int Coal 64 128 • Txqueuelen 2000 • Data moved • 520 Mbit/s • Same for B2B tests • Courtesy of R. Hughes-Jones (Manchester) Networkshop 2003

  20. Future Activities • High-Speed Throughput and Variants • Investigate disk read/write • QoS and Traffic Engineering • Diffserv, MPLS • Marking, Rate limiting, Shaping, Policing (re-classification, dropping) • Defining SLS and SLAs • Middleware installation and integration • GARA, General-purpose Architecture for Reservation and Allocation: V. Sander http://www.gridforum.orgDocuments/GFD/ • Implementation of the AAA server ,L. Gommans • Extension to Europe and the US Networkshop 2003

  21. Conclusions MB-NG: Managed Bandwidth - Next Generation • An end-to-end multi-domain technology trial, bringing together: • Multi-domain aspects • Middleware…QoS to the user • Multi-gigabit network • Protocols for high bandwidth transfers Networkshop 2003

  22. Thank You… Networkshop 2003

  23. TCP tests, UCL->CERN • 100mbit link from UCL->CERN • Saw tooth increase is greater! • Ie a is larger • Limited by 100mbit link… (bandwidth delay ~ 180kbytes) Networkshop 2003

  24. 24 Hours High-Speed TCP mem-mem • TCP mem-mem lon2-man1 • Tx 64 Tx-abs 64 • Rx 64 Rx-abs 128 • 941.5 Mbit/s +- 0.5 Mbit/s Networkshop 2003

  25. Latency at congestion Max Throughput OSR results Minimum latency Networkshop 2003

  26. Summary Networkshop 2003

  27. MB - NG Future Activities StarLight CERN ??? Abilene/ ESNET SuperJANET RAL “Site” UCL “Site” Manchester “Site” Networkshop 2003

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