Wireshark · Wireshark-users: Re: [Wireshark-users] basic usage problem

[Bill Meier <wmeier@xxxxxxxxxxx>]

On 12/12/2012 11:20 AM, Bill Meier wrote:
> On 12/12/2012 9:59 AM, kurt.jensen@xxxxxxxxxxxxxxx wrote:
> > Just installed Wireshark and started capture. Plugged in our GigE camera
> > under development.  Connected and collected a frame of data.
> >
> > Wireshark shows all of the GVCP requests and answers.  Very nice!  But I
> > am not seeing any of the UDP data.  I have no filters set, just selected
> > the interface then slicked start. I have run Wireshark before on another
> > computer where the UDP data just showed up along with the GVCP packets.
> > I know the data is there because my PC app displays the image. But not
> > in Wireshark.
> >
> > How do I get the UDP data?
> >
> > Kurt
>
> I'm not sure I understand.
>
> It appears that GVCP is carried over UDP so it sounds like you are
> saying that only certain UDP frames are missing.
>
> Is the "data" carried over the GVCP protocol ?
>
> If so, I would expect the data show up as being under the GVCP layer of
> the protocol tree (as opposed to the frames just showing as UDP.
> IOW: the "protocol" column would show GVCP as opposed to UDP.
>
> (I've no knowledge of the GVCP protocol so I may be off-base).

Update: It seems that there's a separate protocol (GVSP) for 
transferring data so ignore my comment above.

Is it possible that the data frames are being dissected incorrectly as 
another protocol by Wireshark (so that they don't show as UDP in the 
protocol column) ?