1 QoS monitoring activities TF-STREAM November 127 th, 2000 Victor Reijs

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Presentation transcript:

1 QoS monitoring activities TF-STREAM November 127 th, 2000 Victor Reijs

2 QoS monitoring activities Outline Megaconference II QoS testing… Application behavior on impaired networks... TERENA/DANTE activities...

3 QoS monitoring activities Megaconference II QoS testing Frustration how to predict the QoS of applications –NLM HEAnet MPEG-2 tests Participants... Usual tools… Application-layer network testing...

4 QoS monitoring activities Participants NetIQ Cooperation VidiNet OARnet and ACCORD Internet2 SURFnet and University of Utrecht HEAnet

5 QoS monitoring activities Usual tools ping, traceroute, PingPlotter, Iperf, CV2SIM, NetTach, etc. end-to-end testing, not edge to edge testing RIPE TTM (and Surveyor/Tombstone) edge-to-edge testing, but scarce resource

6 QoS monitoring activities Application-layer network testing Chariot, Qcheck and Endpoints Endpoints in the path (such as peering points) Scripts to simulate traffic between any two Endpoints Central system to gather information

7 QoS monitoring activities General QoS grid topology

8 QoS monitoring activities Small QoS grid setup

9 QoS monitoring activities Test results Script for H.323 video stream: 320 kbit/s –Throughput –Delay –Delay variation –Packet sequence errors –Lost data...

10 QoS monitoring activities Lost data

11 QoS monitoring activities Some conclusions A new tool, so experience needs to be gained Has potential: end2end and edge2edge Has security build in Still proprietary Application behavior on impaired networks...

12 QoS monitoring activities Application behavior on impaired networks Simulate impaired network eg: loss, jitter, delay variation, available bandwidth Server and client on this impairment box Determine perceived application quality –ftp, H.323/VoIP, MPEG-2, streaming, computational grid Multi dimensional space

13 QoS monitoring activities European activities Task Force - Next Generation Networking –QoS/SLS monitoring –Application behavior on impaired networks –Possible cooperation: TEQUILA, e2e Performance –PERTs

14 QoS monitoring activities Questions??? projects/nat_infrastruct/cosmega.html