1 Update on Networking OARnet/ITEC-Ohio Prasad Calyam, OARnet OARTech Presentation, June 8 th, 2005

2 R&D Projects at OARnet Broad areas of Research Open-source Network Measurement Tools Software Development H.323 Beacon, ActiveMon Voice and Video Traffic over IP (VVoIP) Studies Characterization and Modeling Analysis of High-speed Interactive Audiovisual Streams Network Measurement Infrastructure Testbed Development and Maintenance Third Frontier Network Beacon Infrastructure Active and Passive Measurements Analysis using advanced network data mining techniques Characterization of Bulk File Transfer Performance over the Internet High-performance TCP stacks testing with application and network parameters tuning

3 Network measurement tools software development H.323 Beacon H.323 Beacon is a tool that can be used to measure, monitor and qualify the performance of an H.323 Videoconference session. Provides H.323-protocol specific evidence and other information necessary to troubleshoot Voice and Video over IP (VVoIP) application performance problems in the network and at the host (end-to-end). The tool is open-source and can run on both Windows and Linux platforms Being used in many communities including the Internet2 Commons and the Megaconference communities Recommended in whitepapers by Polycom and Apparent Networks Visual Networks Inc. working on a open-source alternate distribution!

4 H.323 Beacon E-Model Computation Results Video indicating effects of Misconfigured Firewall H.323 Beacon Jitter Results for Misconfigured Firewall Scenario Session Statistics Plots Module Typical H.323 Beacon Deployment in a Network Measurement Infrastructure

5 ActiveMon ActiveMon is an extensible and customizable software framework for generation and analysis of active measurements that can be used for routine network health monitoring. Framework Features: An application-specific performance measurement toolkit to measure network health metrics such as: route changes, delay, jitter, loss, bandwidth and MOS Scalable scheduler “OnTimeMeasure” Schedules both on-demand and regularly scheduled measurements Regulates amount of active measurements traffic injected into a network Ensures mutual-exclusion of simultaneous high-impact measurements Optimized database schema to efficiently store massive amounts of measurement data Central data collection and visualization package with easily customizable tabular and network health weather map interfaces Anomaly-alarm notification via - based on advanced statistical analyses that provides relevant evidence and ensures minimum false-alarms Security settings to avoid compromise of measurement infrastructure resources Planning for deploying at core-points of TFN!

6 ActiveMon (2) Route Change Visualization Measurement Tools ActiveMon System Architecture

7 Voice and Video Traffic over IP (VVoIP) Studies Characterization and Modeling Study of impact of various audio and video end-point codecs, packet size distributions, network jitter, lost and re-ordered packets on the end-user perception of audiovisual quality Modeling effects of human, device and network factors in a VVoIP System – plans to develop “E-Model XT” Understanding VVoIP behavior at high-speeds (E.g. MPEG, IPTV) End-to-End Model View of VVoIP System VVoIP study Testbed Spanning 14 countries Video Packetsize Distribution Video Jitter Distribution Network Delay Performance Bounds

8 Third Frontier Network Beacon Infrastructure (TBI) Testbed TFN Beacon Infrastructure testbed Techniques to collect performance measurement data to empirically correlate network events while monitoring TFN Advanced data mining techniques on measurement data to analyze long-term end-to-end network performance trends Testbed spanning Campus, Regional and National Network Backbone paths Long-term Round-trip Delays Visualization Bandwidth Misconfiguration Anomaly

9 Bulk FTP performance testing To understand limiting factors that hinder large-scale data transfers over the Internet Automated scripts to perform bulk FTP tests: Using multiple TCP Window Sizes (RTT*BW± β), Specialized TCP stacks (Reno, Fast TCP, HS TCP, BIC TCP) Various popular Bulk FTP applications (FTP, SCP, BBFTP, Iperf) Effects of single and parallel TCP streams Disaster Recovery Project Testbed Comparing High- performance TCP Stacks Analyzing Bulk FTP application performance by Tuning Application and Network Parameters

10 List of Publications ( ) Prasad Calyam, Chang-Gun Lee, Phani Kumar Arava, Dima Krymskiy, David Lee, “OnTimeMeasure: A Scalable Framework for scheduling active measurements”, IEEE E2EMON, Andrei Sukhov, Prasad Calyam, Warren Daly, Alexander Illin, “Towards an Analytical Model for characterizing behavior of High-Speed VVoIP applications", TERENA Networking Conference (TNC), Prasad Calyam, Dima Krymskiy, Mukundan Sridharan, Paul Schopis, "TBI: End- to-End Network Performance Measurement Testbed for Empirical-bottleneck Detection", IEEE TRIDENTCOM, Andrei Sukhov, Prasad Calyam, Warren Daly, Alexander Illin, "Network Requirements for High-Speed Real-Time Multimedia Data Streams", IPv6 Global Summit, Prasad Calyam, Weiping Mandrawa, Mukundan Sridharan, Arif Khan, Paul Schopis, “H.323 Beacon: An H.323 application related end-to-end performance troubleshooting tool”, ACM SIGCOMM Workshop on Network Troubleshooting (NetTs2004), Prasad Calyam, Mukundan Sridharan, Weiping Mandrawa, Paul Schopis “Performance Measurement and Analysis of H.323 Traffic”, Passive and Active Measurement Workshop (PAM) Proceedings published by Springer in Lecture Notes in Computer Science, Prasad Calyam, Loki Jorgenson, “Network Performance Infrastructures”, Apparent Networks Whitepaper, 2004.

11 Collaborators The Ohio State University University of Cincinnati Cincinnati State Community College Wright State University University of Toledo Southern State Community College NC-ITEC Apparent Networks VoIP Laboratory, UFRJ, Brazil HEAnet, Ireland Samara Institute of Technology, Russia

12 Research Sponsors

13 Internet2/OARnet Network Performance Workshop Announcement Presentations by Internet2 E2Epi Staff Hands-on sessions to deploy OWAMP, BWCTL and NDT on your campuses You will have above tools setup on your campus by the end of the workshop! Registration Requests to: Susan Evett