Transcript Prasad Calyam Research Update

Update on Networking
Research @
OARnet/ITEC-Ohio
Prasad Calyam, OARnet
OARTech Presentation, June 8th, 2005
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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
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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!
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H.323 Beacon
http://www.itecohio.org/beacon
E-Model
Computation Results
Typical H.323
Beacon Deployment
in a Network
Measurement
Infrastructure
Session Statistics
Plots Module
Video indicating
effects of
Misconfigured
Firewall
H.323 Beacon Jitter
Results for
Misconfigured
Firewall Scenario
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ActiveMon
http://www.itecohio.org/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 email - 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!
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ActiveMon (2)
Route Change
Visualization
ActiveMon System
Architecture
Measurement Tools
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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
Network Delay
Performance
Bounds
Video Jitter
Distribution
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Third Frontier Network Beacon
Infrastructure (TBI) Testbed
http://tfn.oar.net/measurement
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
Bandwidth
Misconfiguration Anomaly
Long-term Round-trip
Delays Visualization
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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
Comparing Highperformance TCP
Stacks
Disaster Recovery
Project Testbed
Analyzing Bulk FTP application
performance by Tuning
Application and Network
Parameters
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List of Publications (2004-05)
Prasad Calyam, Chang-Gun Lee, Phani Kumar Arava, Dima Krymskiy, David
Lee, “OnTimeMeasure: A Scalable Framework for scheduling active
measurements”, IEEE E2EMON, 2005.
Andrei Sukhov, Prasad Calyam, Warren Daly, Alexander Illin, “Towards an
Analytical Model for characterizing behavior of High-Speed VVoIP
applications", TERENA Networking Conference (TNC), 2005.
Prasad Calyam, Dima Krymskiy, Mukundan Sridharan, Paul Schopis, "TBI: Endto-End Network Performance Measurement Testbed for Empirical-bottleneck
Detection", IEEE TRIDENTCOM, 2005.
Andrei Sukhov, Prasad Calyam, Warren Daly, Alexander Illin, "Network
Requirements for High-Speed Real-Time Multimedia Data Streams", IPv6
Global Summit, 2004.
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), 2004.
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, 2004.
Prasad Calyam, Loki Jorgenson, “Network Performance Infrastructures”,
Apparent Networks Whitepaper, 2004.
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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
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Research Sponsors
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Internet2/OARnet Network
Performance Workshop Announcement
http://e2epi.internet2.edu/network-perf-wk/oarnet
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!
Email Registration Requests to:
Susan Evett
[email protected]
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