Wireshark mailing list archives
Re: basic usage problem
From: "kurt.jensen () us ophiropt com" <kurt.jensen () us ophiropt com>
Date: Wed, 12 Dec 2012 20:32:34 +0000
OK, new clue. I can see the UDP data packets in Wireshark when using Pleora GEVPlayer to capture frames from the camera. I cannot see the UDP data packets in Wireshark when using National Instruments IMAQdx to capture frames from the camera. Maybe NI is circumventing Wireshark? This is where I do not understand how the app receives the packets and Wireshark spies on the data. From: Jensen, Kurt Sent: Wednesday, December 12, 2012 11:09 AM To: 'Community support list for Wireshark' Subject: RE: [Wireshark-users] basic usage problem Thanks Murio Jumbo Frames is on (GigE only ). Jumbo Packets is set to 9014. I know the packets are coming in because I capture and display them with my app. Kurt From: wireshark-users-bounces () wireshark org<mailto:wireshark-users-bounces () wireshark org> [mailto:wireshark-users-bounces () wireshark org]<mailto:[mailto:wireshark-users-bounces () wireshark org]> On Behalf Of Murilo Grizi Sent: Wednesday, December 12, 2012 10:32 AM To: Community support list for Wireshark Subject: Re: [Wireshark-users] basic usage problem ...(sent accidentally) I'm not sure that can help you, but, since you're having a Video issue, it could be a 'jumbo frame' problem. You could take a look at it. Thanks, 2012/12/12 Murilo Grizi <mbgrizi () gmail com<mailto:mbgrizi () gmail com>> Kurt, I use Wireshark on Windows (ok, everyone kill me) and I've had this issue of 'packets missing' many times. Possible causes that I identified were: - Packet too big (had to enable Jumbo Frames on my NIC) - NIC unable to read VLAN (had to create a VLAN tag on my board) - Couldn't see VLAN tag on capture (had to even change the registry to do so... BTW: on Windows XP it worked, but changing the registry didn't do anything different on Windows 7). I'm not sure that can help you, but, since you 2012/12/12 Bill Meier <wmeier () newsguy com<mailto:wmeier () newsguy com>> On 12/12/2012 11:20 AM, Bill Meier wrote: On 12/12/2012 9:59 AM, kurt.jensen () us ophiropt com<mailto:kurt.jensen () us ophiropt com> 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) ? ___________________________________________________________________________ Sent via: Wireshark-users mailing list <wireshark-users () wireshark org<mailto:wireshark-users () wireshark org>> Archives: http://www.wireshark.org/lists/wireshark-users Unsubscribe: https://wireshark.org/mailman/options/wireshark-users mailto:wireshark-users-request () wireshark org<mailto:wireshark-users-request () wireshark org>?subject=unsubscribe -- "Deus que me conceda esses Ășltimos desejos - paz e prosperidade para o Brasil..." (Dom Pedro II) -- "Deus que me conceda esses Ășltimos desejos - paz e prosperidade para o Brasil..." (Dom Pedro II)
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Current thread:
- basic usage problem kurt.jensen () us ophiropt com (Dec 12)
- Re: basic usage problem Bill Meier (Dec 12)
- Re: basic usage problem Bill Meier (Dec 12)
- Re: basic usage problem Murilo Grizi (Dec 12)
- Re: basic usage problem Murilo Grizi (Dec 12)
- Re: basic usage problem kurt.jensen () us ophiropt com (Dec 13)
- Re: basic usage problem kurt.jensen () us ophiropt com (Dec 13)
- Re: basic usage problem Bill Meier (Dec 12)
- Re: basic usage problem kurt.jensen () us ophiropt com (Dec 13)
- Re: basic usage problem Bill Meier (Dec 12)
- Re: basic usage problem kurt.jensen () us ophiropt com (Dec 13)