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02 nd April 03Networkshop 20031 Managed Bandwidth Next Generation F. Saka UCL NETSYS (NETwork SYStems centre of excellence)

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Presentation on theme: "02 nd April 03Networkshop 20031 Managed Bandwidth Next Generation F. Saka UCL NETSYS (NETwork SYStems centre of excellence)"— Presentation transcript:

1 02 nd April 03Networkshop 20031 Managed Bandwidth Next Generation F. Saka UCL NETSYS (NETwork SYStems centre of excellence)

2 02 nd April 03Networkshop 20032 Outline Overview of project goals Recent findings Future activities Conclusion

3 02 nd April 03Networkshop 20033 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

4 02 nd April 03Networkshop 20034 Industrial and research partners MB-NG (http://www.mb-ng.net)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!

5 02 nd April 03Networkshop 20035 SuperJANET UCL RAL Manchester The MB-NG network

6 02 nd April 03Networkshop 20036 SuperJANET UCL RAL Manchester RAL Manchester UCL Static SLAs Static SLAs Static SLAs Dynamic SLAs Dynamic SLAs The QoS enabled MB-NG network

7 02 nd April 03Networkshop 20037 WAN: MAN - LON - RAL 1 x GE OC-48 POS MAN 7609 GE-WAN 2 x GE 7609 OC-48 POS GE-WAN UCL 7609 UKERNA ULCC: 12016 Wcom: 12416 RAL OC-48 POS GE-WAN 7609 2.5 Gbit/s 1.0 Gbit/s  We are interested in: 12000 GSR: OC48 POS interfaces 7600 OSR: Gigabit Ethernet and OC48 POS interfaces

8 02 nd April 03Networkshop 20038 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)

9 02 nd April 03Networkshop 20039 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  We want to know the performance of: Engine2  Engine2 Engine2  Engine3 Engine3  Engine2 GSRAX4000

10 02 nd April 03Networkshop 200310 GSR results Throughput Latency

11 02 nd April 03Networkshop 200311 Testing OSR (7609) Performance 7609 chassis with one OC48 POS line card and GE-WAN cards Adtech AX4000 from Spirent OC48 POS GE AX4000 7609  We want to know the performance of: GE  OC48

12 02 nd April 03Networkshop 200312 OSR results Throughput Latency

13 02 nd April 03Networkshop 200313 WAN: Manchester – London 3 flows. UCL to Manchester 2 Best Effort, 1 Less Than Best Effort (LBE) 1 x GE OC48 POS PCs MAN GE-WAN GE 7609 OC48 POS GE-WAN PCs UCL 7609 UKERNA Wcom: 12416 ULCC: 12016 7609 GE Policy applied here 89% BE and 10% LBE 7609

14 02 nd April 03Networkshop 200314 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

15 02 nd April 03Networkshop 200315 Router notes for QoS GSROSR Engine 2 line card does not shape on input (O.K. on output) GE-WAN version 1 does not support WRED and low latency queues Engine 3 does reclassification but not Engine 2 OC48-POS: We recommend the “enhanced” version Scheduling uses MDRR which requires WRED to function Packet Scheduling uses Class Based WFQ No back-pressure on Engine 2 and Engine 3 line cards. Each line card operate like a separate router.

16 02 nd April 03Networkshop 200316 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

17 02 nd April 03Networkshop 200317 TCP performance Linux Kernel 2.4.19 Through MB-NG network (6ms RTT) Gigabit Ethernet (Intel e1000) Courtesy of Yee-Ting Li (UCL)

18 02 nd April 03Networkshop 200318 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)

19 02 nd April 03Networkshop 200319 Gridftp Throughput Int Coal 64 128 Txqueuelen 2000 Data moved 520 Mbit/s Same for B2B tests Courtesy of R. Hughes-Jones (Manchester)

20 02 nd April 03Networkshop 200320 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/http://www.gridforum.orgDocuments/GFD/ Implementation of the AAA server, L. Gommans Extension to Europe and the US

21 02 nd April 03Networkshop 200321 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

22 02 nd April 03Networkshop 200322 Thank You…

23 02 nd April 03Networkshop 200323 TCP tests, UCL->CERN 100mbit link from UCL->CERN100mbit link from UCL->CERN Saw tooth increase is greater!Saw tooth increase is greater! Ie a is largerIe a is larger Limited by 100mbit link… (bandwidth delay ~ 180kbytes)Limited by 100mbit link… (bandwidth delay ~ 180kbytes)

24 02 nd April 03Networkshop 200324 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

25 02 nd April 03Networkshop 200325 OSR results Latency at congestion Max Throughput Minimum latency

26 02 nd April 03Networkshop 200326 Summary Peak throughpu t. (Gbit/s) Peak Packet rate. (MP/s) Min packet size for peak throughput. (Bytes) Latency variables. Below 500 /200 bytes Latency variables. Above 500/200 bytes Engine C (u s ) M (us/byte) C (us) M (us/byte) GSR2->2+2.363.548328.51/89NA GSR2->32.363.548335.51/11735.01/91 GSR3->22.363.828333.01/9838.51/91 OSR at congestion GE- >POS 2.372.612008001/0.41634111/0.149 OSR below congestion GE- >POS NA 12.51/7412.51/74

27 02 nd April 03Networkshop 200327 MB - NG SuperJANET UCL “Site” UCL “Site” RAL “Site” RAL “Site” Manchester “Site” Manchester “Site” Abilene/ ESNET Abilene/ ESNET CERN ??? StarLight Future Activities

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