Detective and NDTLive’n on the edge of Network

Performance

Detective and NDTLive’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

Detective UpdateDetective 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

NDT’s Web100 Based ApproachNDT’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

Web Based Performance toolWeb 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

Web base Performance toolWeb 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

Integrating NDT and DetectiveIntegrating NDT and Detective

PerformanceMeasurement

Controller (PMC)

MeasurementDomain Interface

(MDI)

Performance Measurement Point (PMP)

Web Service

NetworkMonitoring

Database

Detect

Authorize

Schedule

Test

Store

Interface

BWCTL OWAMP TraceRoute NDT

DiscoveryModule

“Detective”Applet

Internet2 Detective

AnalysisModule

Performance MeasurementDomain (PMD)

Local Browser /w

Java

NDT Tests for:NDT Tests for:

• Bi-directional achieved speed

• NAT detection

• Bottleneck Link Detection

• Duplex Mismatch Detection

• Network congestion

• Faulty Cables

• Path Duplex operating mode

NDT testing shows Duplex Mismatch at one end

NDT testing shows Duplex Mismatch at one end

Duplex Mismatch CorrectedDuplex Mismatch Corrected

AvailabilityAvailability

•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.edu•Goto http://e2epi.internet2.edu/ndt web site and click • ndt-users – General discussion on NDT tool• ndt-announce – Announcements on new features

NDT serversNDT servers

NDT BenefitsNDT 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