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TF-NGN, Paris November 20 th , 2000 Victor Reijs

This outline discusses QoS monitoring for application performance optimization, including determining demands, simulating network impairments, and evaluating perceived quality. It covers methods, tools, and deliverables in ensuring high-quality network performance.

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TF-NGN, Paris November 20 th , 2000 Victor Reijs

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  1. TF-NGN, Paris November 20th, 2000 Victor Reijs QoS monitoring

  2. Outline • QoS where?... • OoS/SLS monitoring/auditing... • Questions... QoS monitoring

  3. QoS where? QoS/SLS monitoring/ auditing... Application QoS demands... Monitoring network QoS... QoS monitoring

  4. Application QoS demands • Some QoS demands are known • To be studied QoS demands... QoS monitoring

  5. To be studied QoS demands • Determine compelling applicationsftp, H.323, streaming, MPEG-2, computational grid • Simulate impaired network... • Determine perceived quality of application... QoS monitoring

  6. Simulate impaired network • Determine micro-flow QoS parameters • delay and delay variation • packet drop and out-of-order • available bandwidth • Change behaviour within micro-flow (AF) • Change of network load • unloaded • overprovisioned • loaded QoS monitoring

  7. Determine perceived quality of application • n-dimensional space • Providing input for debugging: • application behaviour • network behaviour QoS monitoring

  8. Monitoring network QoS • Methods in principle not part of this activity • Must come out from other activities: unloaded, OvNet, diff. Serv., int. Serv. • Monitoring PHB parameters average traffic, loss per queue, queue length, etc. • Monitoring network routing, topology, etc. QoS monitoring

  9. QoS/SLS monitoring/auditing • Defining environments… • Gathering reference models… • Fixing definitions… • Inventorying/evaluating tools... • Deliverables... QoS monitoring

  10. Defining environments • Per micro flow environment looking at applications, end-to-end • Aggregated environment PHB QoS monitoring

  11. Gathering reference models • Existing SLS’s • TEQUILA • IETF (IPPM) • Internet2 e2e performance • ... QoS monitoring

  12. Fixing definitions • Fix reference model and its options • What to measure: • micro-flow... • aggregated... QoS monitoring

  13. Micro flow • Path and peering points • delay (one way???) and jitter • packet drop and out-of-order • available/peak bandwidth • ... QoS monitoring

  14. Aggregated • Per hop • average load/available bandwidth • packet loss per queue/class • queue length per class • Path • routing QoS monitoring

  15. Inventorying/evaluating tools • ping • traceroute • route flapping • ttcp/netperf/tcpblast • chariot • RIPE TTM/Surveyor • NetFlow • etc. QoS monitoring

  16. Deliverables • Reports • Presentations • Tutorials QoS monitoring

  17. Summary sub activities • Determining application QoS demand • Determing QoS/SLS per micro flow • Determing aggregated QoS/SLS • Determing network QoS QoS monitoring

  18. Questions • Relation with other activities • Aggregated/micro-flow • Accuracy needed? • Long/short term • Time frame • Who??? QoS monitoring

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