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QoS Monitoring and SLS Auditing: Metrics, Tools, and Measurement Infrastructure

This presentation explores Quality of Service (QoS) monitoring and Service Level Specification (SLS) auditing, outlining critical metrics such as available bandwidth, packet loss, and delay variations. It addresses the necessary tools and methodologies for measuring and managing QoS, including active and passive measurement techniques. The evolving nature of network management is also discussed, emphasizing the importance of secure access, compatibility across different systems, and trustable results. Join us for insights on optimizing network performance and fulfilling SLS requirements.

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QoS Monitoring and SLS Auditing: Metrics, Tools, and Measurement Infrastructure

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  1. QoS monitoring and SLS auditing TNC-2002, Limerick June4th, 2002 Victor Reijs victor.reijs@heanet.ie QoS monitoring and SLS auditing

  2. Outline • QoS/SLS monitoring/auditing... • Measurement infrastructure… • Questions... QoS monitoring and SLS auditing

  3. Which QoS QoS monitoring and SLS auditing

  4. Application based SLSmetric • Available bandwidth (avail-bw) • link capacity, routing • One-way packet loss (OWPL) • One-way loss pattern • faults, congestion • IP packet delay variation (ipdv) • congestion • One-way delay (OWD) • access protocol, routing and distance QoS monitoring and SLS auditing

  5. Maximum packet loss • Video (MPEG-2) • 10-5 to 10-3 (with FEC) • File transfer (FTP) • 10-6 (2 MByte buffer) to 10-3 (64 kByte buffer) • Voice (G.711, G.729) • 10-2 to 10-1 (with FEC/PLC) QoS monitoring and SLS auditing

  6. Tools for SLS metric • Available bandwidth (-) • SLoPS, (MRTG’s in path) • One-way packet loss (RFC 2680) • RIPE TTM, (RUDE/CRUDE), etc. • One-way loss pattern (Internet-Draft) • Chariot VoIP • IP packet delay variation (Internet-Draft) • Chariot VoIP, MBone conf. Applications, (RIPE TTM), etc. • One-way delay (RFC 2679) • RIPE TTM, IPMP, NTP-based?, etc. QoS monitoring and SLS auditing

  7. Tools for composite metric • Audio Mean Opinion Score • ITU standards: P.800 and G.107 • Chariot (active), VQmon (passive) • Video Mean Opinion Score • no standard yet • no tools related to networks yet • Other composite tools like for GRID’s, etc. QoS monitoring and SLS auditing

  8. Specification of measurement infrastructure (1) • Flexible platform • For end-users and network managers • Different operating systems • Different measurements • Active and passive measurements • Upgradeable • Support the moving and evolving environment QoS monitoring and SLS auditing

  9. Specification of measurement infrastructure (2) • Secure access to infrastructure • Multiple network management domains • Trustable and exchangeable results • resource management • standardized protocol/methodology QoS monitoring and SLS auditing

  10. Measurement infrastructure QoS monitoring and SLS auditing

  11. More information • TF-NGN meeting: July 1st and 2nd in Berlin • http://www.dante.net/tf-ngn • victor.reijs@heanet.ie QoS monitoring and SLS auditing

  12. Abbreviations avail-bw Available Bandwidth FEC Forward Error Correction ipdv IP packet Delay Variation OWD One-Way delay OWPL One-Way Packet Loss PLC Packet Loss Concealment QoS Quality Of Service SLoPS Self-LOading Periodic Streams SLS Service Level Specification QoS monitoring and SLS auditing

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