1. 1 QoS monitoring and SLS auditing TNC-2002, Limerick June 4 th, 2002 Victor Reijs victor.reijs@heanet.ie

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

3. 3 QoS monitoring and SLS auditing Which QoS

4. 4 QoS monitoring and SLS auditing Application based SLS metric 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

5. 5 QoS monitoring and SLS auditing 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)

6. 6 QoS monitoring and SLS auditing Tools for SLS metric Available bandwidth (-) –SLoPS, (MRTGs 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.

7. 7 QoS monitoring and SLS auditing 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 GRIDs, etc.

8. 8 QoS monitoring and SLS auditing 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

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

10. 10 QoS monitoring and SLS auditing Measurement infrastructure

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

12. 12 QoS monitoring and SLS auditing Abbreviations avail-bw Available Bandwidth FECForward Error Correction ipdvIP packet Delay Variation OWDOne-Way delay OWPLOne-Way Packet Loss PLCPacket Loss Concealment QoSQuality Of Service SLoPSSelf-LOading Periodic Streams SLSService Level Specification