Re: Issue with RTT values in Wireshark

[Martin Visser <martinvisser99 () gmail com>]

Nitin,

I'm not sure I understand, RTT (Round Trip Time) doesn't make sense for RTP
streams, as they are unacknowledged and simplex (travel in one direction).
Where are you seeing this calculation?

Regards, Martin

MartinVisser99 () gmail com


On 6 April 2012 15:09, NITIN GOYAL <nitinkumgoyal () gmail com> wrote:

> Hi All
>
> Can anybody help me out in the below query related to RTT calculation??
>
> Thanks
> Nitin
>
>
> On Wed, Apr 4, 2012 at 1:16 PM, NITIN GOYAL <nitinkumgoyal () gmail com>wrote:
>
> > Hi All
> >
> > I have an issue with the Wireshark for calcuating the RTT values. For few
> > pcaps, I have a higher value of RTT on one side or direction but the lower
> > value of RTT on other side.
> >  I have taken the trace in the middle of the connections and in one
> > direction the RTT calculated by Wireshark is around 40 ms but on what other
> > direction its 1.5 ms.
> >
> > But i think ideally both the sides should have the same values as its
> > round trip time(like a loop).
> >
> > The trace is RTP over UDP over a VoIP tool.
> >
> > Now, when i use some other licensed tool based on libpacp used by
> > Wireshark as well, the values for both the sides is almost same with the
> > same pcap file.
> >
> > So, i am not sure if Wireshark is calculating the wrong RTT values or the
> > interpreation is differnet by other tools as how to calcuate the RTT
> > vlaues??
> >
> > Any idea about this??
> >
> > Regards
> > Nitin
>
>
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