WireShark - Checksum offload

Unanswered Question
Mar 4th, 2007

Hey Everyone,

I am using Wireshark and I am getting alot of Checksum offload errors. Can someone please explain what this does? Do I need to disable it?

Cheers,

Mark

I have this problem too.
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miheg Mon, 03/05/2007 - 00:57

I'm seeing this too in wireshark 0.99.5. Bug maybe, in winpcap 4.0 or wireshark.

Didn't see this in previous versions like 099.4. Maybe you try an older version of wireshark/winpcap

Cheers,

Michel

Joe Clarke Mon, 03/05/2007 - 14:31

I've seen this when using Wireshark/Ethereal with newer network cards on newer OS versions (e.g. Solaris 9, Windows 2003, FreeBSD 6.X). If the card and driver support checksum offloading, then wireshark shows errors. I have since disabled IP and TCP checksums in Wireshark, but this is not required. Wireshark will still work even if the errors are shown.

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