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Network performance measurement using IPERF

By Shravankumar Kiran Bhat

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Measurement of parameters of network

Bandwidth Latency

Error Rate Jitter

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IPERF is tool for measurement of the maximum achievable

bandwidth for IP networks

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Why Iperf ?

No manual data input Multiple parallel streams

How it works ?

SERVER

iperf -s

CLIENT

iperf -c <SERVER_IP>

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data

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Server

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Client

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Options

Server

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-i set interval between reports

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-i set interval between reports

Client

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Server

-u Perform a UDP test

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Client

-u Perform a UDP test

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Client

-b Set target bandwidth

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Server

-b Set target bandwidth

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-t Time in seconds to transmit dataClient

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Server

-t Time in seconds to transmit data

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Client

-n Bytes to transmit

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Server

-n Bytes to transmit

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Client

-w Set window size

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Server

-w Set window size

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-m display maximum segment size

Client

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-m display maximum segment size

Server

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-P Number of parallel streams Client

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-P Number of parallel streams Server

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Client

-F Data as an input file

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Server

-F Data as an input file

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Client

-f Format of output

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Different formats which can be used

K - KilobytesM - MegabytesG - Gigabytesk - Kilobitsm - Megabitsg - Gigabits

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Server

-f Format of output

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Client

-p Port to use

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Server

-p Port to use

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Client

-l Specify datagram size

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Server

-l Specify datagram size

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Client

-r Bidirectional individual bandwidth measurement

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Server

-r Bidirectional individual bandwidth measurement

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Tired of commands ?

Use

Jperf !

37Image courtesy of code.google.com/p/xjperf/

-s - Specify host as a server-c - Specify host as client-u - Perform UDP test-i - Interval between reports-t - Time to transmit for-n - Bytes to transmit-w - Set TCP window size-P - Number of parallel streams to use-b - Target bandwidth-F - Input data via a file-f - Format of output-p - port to listen to-l - Datagram size of UDP to use-r - Bidirectional Individual bandwidth -d - Bidirectional simultaneous bandwidth measurement-D – Run server as daemon. Output to a file

PARAMETER LIST

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Reference• http://www.openss7.org

• http://bradhedlund.com/2008/12/19/how-to-calculate-tcp-throughput-for-long-distance-links/

• http://www.tcpipguide.com/free/t_PerformanceMeasurementsSpeedBandwidthThroughputand.html

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