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Death of a Network: Identify the Hidden Causes of Lousy Network Performance

Required Slide. SESSION CODE: WSV303. Death of a Network: Identify the Hidden Causes of Lousy Network Performance. Laura Chappell Author Wireshark Network Analysis: The Official Wireshark Certified Network Analyst Study Guide wiresharkbook.com.

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Death of a Network: Identify the Hidden Causes of Lousy Network Performance

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  1. Required Slide SESSION CODE: WSV303 Death of a Network:Identify the Hidden Causes of Lousy Network Performance Laura Chappell Author Wireshark Network Analysis: The Official Wireshark Certified Network Analyst Study Guide wiresharkbook.com

  2. What Really Kills Network Performance?(other than users) CRIME SCENE DO NOT CROSS

  3. Packet Loss(UDP-based or TCP Selective ACK Disabled)

  4. Let’s Look at Packet Loss bad-at-b.pcap DEMO

  5. We sent already… must have been lost

  6. We already sent all of these… SACK is disabled – bummer!

  7. Latency(How bad is 100ms delay on a path?)

  8. Latency and Throughput Test Results

  9. Latency and Throughput Test Results

  10. Latency and Throughput Test Results

  11. Latency and Throughput Test Results

  12. Noise/Interference(Wireless Environment)

  13. Other Causes of Network Death • Misconfigurations • Poorly-behaving applications • Faulty devices • Cruddy software CRIME SCENE DO NOT CROSS

  14. Other Causes of Network Death • Malicious applications or communications • Network design • Security • Users CRIME SCENE DO NOT CROSS

  15. Wanna See a Misbehaving Application/Device? • iphone-attitude.pcap Rules are for mortals!

  16. Required Slide Speakers, please list the Breakout Sessions, Interactive Sessions, Labs and Demo Stations that are related to your session. Related Content • SIA336 Wiretapping Kung Fu: Becoming a Network Analyst Guru • SIA335 Death of Security: Breached Hosts/Stolen Data/IP Espionage • SIA332 (Panel) Securing the Cloud: Expert Panel • Online Videos: www.wiresharkbook.com

  17. Required Slide Resources Learning • Sessions On-Demand & Community • Microsoft Certification & Training Resources www.microsoft.com/teched www.microsoft.com/learning • Resources for IT Professionals • Resources for Developers • http://microsoft.com/technet • http://microsoft.com/msdn

  18. Required Slide Complete an evaluation on CommNet and enter to win!

  19. Sign up for Tech·Ed 2011 and save $500 starting June 8 – June 31st http://northamerica.msteched.com/registration You can also register at the North America 2011 kiosk located at registrationJoin us in Atlanta next year

  20. © 2010 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries. The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

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