Wireshark-users: Re: [Wireshark-users] mesure jitter
From: "Avihai Shoham" <Avihai.Shoham@xxxxxxxxxxxxxx>
Date: Sun, 23 Aug 2009 15:07:39 +0300




I meant a Jitter when host A sent UDP packets I would like to know with which jitter the udp packets were sent.

The issue is UDP packets doesn’t have any clock signal


According to RFC3393 it should be match to :

     The second meaning has to do with the variation of a metric (e.g.,

   delay) with respect to some reference metric (e.g., average delay or

   minimum delay).  This meaning is frequently used by computer

   scientists and frequently (but not always) refers to variation in




-----Original Message-----
From: wireshark-users-bounces@xxxxxxxxxxxxx [mailto:wireshark-users-bounces@xxxxxxxxxxxxx] On Behalf Of Maik Wodarz
Sent: Friday, August 14, 2009 7:07 PM
To: Community support list for Wireshark
Subject: Re: [Wireshark-users] mesure jitter




which definition of jitter you want use? There are a lot of definitions

of jitter. Normally it is the variation of the latencies. But if you

measure with netperf or iperf the jitter is defined in a different

manner. (RFC3550)


In fact for jitter corresponding to (J. Mantel, "Definition Of Jitter

And A Fast Method To Derive It", electronic Letters, 2(8), 1966) you

have to measure the latencies and to calculate the standard deviation.

You have to measure more than 31 values to approximate the real jitter.


In which Network you measure? Or better: What you have measured? The

round trip time? Then be sure that the link is symmetric. Elsewhere you

will not measure the real latency. Or you have sent on host A udp

packets and have measured the receiving time points on host B?






Avihai Shoham schrieb:

> Hi



> I wonder how I can measure jitter with wireshark.


> I have a pcap of udp packets and I want to know what the network jitter is



> Please advice.



> Thanks in advanced



> Avihai







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