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Traffic Generation CERN

Traffic Generation CERN. Dr. R ă zvan Beuran Mihai Ivanovici Dr. Neil Davies. Outline. Test systems Enet32 ANT GETB Traffic generation Test setup. Test systems. Enet32 FPGA-based custom-designed platform 32-port FastEthernet traffic generation ANT (Advanced Network Tester)

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Traffic Generation CERN

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  1. Traffic Generation CERN Dr. Răzvan Beuran Mihai Ivanovici Dr. Neil Davies

  2. Outline • Test systems • Enet32 • ANT • GETB • Traffic generation • Test setup

  3. Test systems • Enet32 • FPGA-based custom-designed platform • 32-port FastEthernet traffic generation • ANT (Advanced Network Tester) • Using Alteon programmable NICs • Ethernet & IP traffic up to 1 Gbps • GETB (Gigabit Ethernet Tester Board) • Dual-port FPGA custom-designed board • Ethernet & IP traffic up to 1 Gbps

  4. Enet32

  5. ANT Alteon NIC architecture

  6. GETB GETB architecture

  7. Traffic generation • Pre-computed traffic descriptors uploaded to the test system • Describe traffic patterns in terms of • source & destination addresses • packet size • inter-packet gap • Test system generates traffic according to the descriptors, in real-time

  8. Generated traffic (Enet32) CBR traffic Poisson traffic

  9. Test setup • Test systems with up to 140 ports • Measure in real-time • Packet loss • Average delay • Throughput • Histograms etc.

  10. Results • SP and WRR bad behaviour

  11. Conclusions • Systems used for thorough tests on switches and networks • High performance traffic generation • Due to our low-level approach • Reusability of the FPGA platforms • ATLAS Trigger traffic emulator • Network emulator

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