1. Detective and NDT Live’n on the edge of Network Performance Joint Techs Winter 2006 Bob Riddle/Rich Carlson {bdr|RCarlson}@internet2.edu Joint Techs Winter 2006 Bob Riddle/Rich Carlson {bdr|RCarlson}@internet2.edu

2. Detective Update http://people.internet2.edu/~bdr/detective/futures.html Java Applet for “normal users” International Detective for net-experts Retire the “old” clients” Why? Interoperability with international partners Extensible Hetergenous platform support

3. NDT’s Web100 Based Approach Simple bi-directional test to gather E2E data Gather multiple data variables from server Compare measured performance to analytical values Translate network values into plain text messages Geared toward campus area network

4. Web Based Performance tool Operates on Any client with a Java enabled Web browser What it can do Positively state if Sender, Receiver, or Network is operating properly Provide accurate application tuning info Suggest changes to improve performance

5. Web base Performance tool What it can’t do Tell you where in the network the problem is Tell you how other servers perform Tell you how other clients will perform

6. Integrating NDT and Detective Performance Measurement Controller (PMC) Measurement Domain Interface (MDI) Performance Measurement Point (PMP) Web Service Network Monitoring Database Detect Authorize Schedule Test Store Interface BWCTLOWAMPTraceRouteNDT Discovery Module “Detective” Applet Internet2 Detective Analysis Module Performance Measurement Domain (PMD) Local Browser /w Java

7. NDT Tests for: Bi-directional achieved speed NAT detection Bottleneck Link Detection Duplex Mismatch Detection Network congestion Faulty Cables Path Duplex operating mode

8. NDT testing shows Duplex Mismatch at one end

9. Duplex Mismatch Corrected

10. Availability Open Source Development project http://www.sourceforge.net/projects/ndt Tools available via from http://e2epi.internet2.edu/ndt/download.html Contains source code Email discussion list ndt-users@internet2.edundt-users@internet2.edu Goto http://e2epi.internet2.edu/ndt web site and clickhttp://e2epi.internet2.edu/ndt ndt-users – General discussion on NDT tool ndt-announce – Announcements on new features

11. NDT servers

12. NDT Benefits End-user based view of network Can identify configuration problems Can identify performance bottlenecks Provides some ‘hard evidence’ to users and network administrators to reduce finger pointing Doesn’t rely on historical data