Thanks
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
delay
-----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
Hi,
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?
regards
Maik
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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