140 likes | 177 Views
Dive into QoS monitoring activities including Megaconference II testing, application behaviors on impaired networks, and European initiatives. Explore network testing tools, application-layer testing, and test results with detailed conclusions. Learn about simulation of impaired networks, European collaborations, and future prospects.
E N D
QoS monitoring activities TF-STREAM November 127th, 2000 Victor Reijs victor.reijs@heanet.ie QoS monitoring activities
Outline • Megaconference II QoS testing… • Application behavior on impaired networks... • TERENA/DANTE activities... 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... QoS monitoring activities
Participants • NetIQ Cooperation • VidiNet • OARnet and ACCORD • Internet2 • SURFnet and University of Utrecht • HEAnet 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 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 QoS monitoring activities
General QoS grid topology QoS monitoring activities
Small QoS grid setup QoS monitoring activities
Test results • Script for H.323 video stream: 320 kbit/s • Throughput • Delay • Delay variation • Packet sequence errors • Lost data... QoS monitoring activities
Lost data 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... 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 QoS monitoring activities
European activities • Task Force - Next Generation Networking • QoS/SLS monitoring • Application behavior on impaired networks • Possible cooperation: TEQUILA, e2e Performance • PERTs QoS monitoring activities
Questions??? www.heanet.ie/heanet/ projects/nat_infrastruct/cosmega.html victor.reijs@heanet.ie QoS monitoring activities