Re: Jitter and Delay

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I would agree 
for ipt packet stats on jitter, latecy, p loss and rtt 
i would look into saa / ip-sla ios features if your utilizing cisco as 
your route.switch vendor
avaya phones can report stats as well in conjunction with their sig 
appliance
otherwise, i find it rather unscientific to rely on ethereal time fields 
for exactness - their is some ambiguities 
look into the rttmon mib 

[email protected] wrote on 08/15/2006 09:03:11 AM:

> -------------------
> The Ethereal project is being continued at a new site.  Please go to
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> -------------------
> 
> Hi,
> 
> I dont really understand your situation and input and output, however,
> I dont think you can get the delay from Ethereal or any one-side
> monitoring tool.
> You can ping the remote host and get the RTT.
> Divide it by two and thats your delay.
> (If you know a better way to measure it, please please tell me.)
> 
> You can, however, measure the jitter by comparing the inter-arrival
> time of each packet.
> Comparing the arrival time is not real delay variation (because it is
> not delay that you are comparing) but it can give you the picture of
> jitter.
> There is a paper discussing this. Check out:
> http://carmen.cselt.it/papers/iss2000-ipdv/paper/ipdv.html
> 
> Cheers,
> Isara Anantavrasilp
> 
> 
> 
> 
> 
> On 8/1/06, Joby James -X (jobjames - WIPRO at Cisco) 
> <[email protected]> wrote:
> > -------------------
> > The Ethereal project is being continued at a new site.  Please go to
> > http://www.wireshark.org and subscribe to 
[email protected].
> > Don't forget to unsubscribe from this list at
> > http://www.ethereal.com/mailman/listinfo/ethereal-users
> > -------------------
> >
> >
> >
> >
> >
> > Hi All,
> >   I am using /usr/local/bin/tethereal
> >
> > "tethereal 0.10.0a
> > Compiled with GLib 1.2.10, with libpcap 0.8.IOU, with libz 1.1.3,
> > with libpcre 4.3, with UCD-SNMP 4.2.6, without ADNS.
> > Running with libpcap version 0.8 on SunOS 5.8"
> >
> > I want to grep some packets from test equipment to a Router and need 
to find
> > out the jitter & delay.
> > What are the optional parameters I can give to get Packet, Sequence, 
Delta
> > (ms), Jitter (ms), IP BW (kbps), Length
> >
> > To find out the delay how do I do that???? What are the optional 
parameters
> > we should give to get the following output?
> >
> >  OUTPUT  88.88.101.11,  3.3.3.2,  RTP Payload type=ITU-T G.711 PCMU,
> > SSRC=2078566856, Seq=27592, Time=2943916440 delay:0.253
> > INPUT  2.2.2.2, 88.88.101.11, RTP, Payload type=ITU-T G.711 PCMU,
> > SSRC=2078566856, Seq=27593, Time=2943916600
> >
> > Thanks and regards,
> >  Joby James ___________________________
> >  W i p r o Technologies
> >                     Applying Thought
> >  #8, 7th Main, 1st Block
> >  Koramangala,
> >  Bangalore-560034
> >  Mobile: +91-9880 696590
> >  http://www.wipro.com
> >  ___________________________
> >
> >
> >
> >
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