[Winpcap-users] Vlan tagged traffic not capture on 64 bit Windows

Guy Harris guy at alum.mit.edu
Fri Oct 8 14:02:58 PDT 2010

On Oct 8, 2010, at 1:32 PM, Pushkar Tiwari wrote:

> I am having Winpcap 4.1.1 installed on my 64 bit Windows 2008 Server box. I have developed application using winpcap to capture network packets in prominiscous mode.
> My application works perfectly fine when I try to capture normal traffic, but it fails to capture VLan tagged traffic. I even tried to capture using wireshark, but even it failed for VLan tagged traffic.
> Same applciation works on Windows 32 bit machine

Do the 32-bit Windows machine and the 64-bit Windows machine have exactly the same type of Ethernet adapter with the exact same version of the driver?

If not, there's more of a difference between the two machines than 32-bit vs. 64-bit.  Different adapters and drivers can handle VLAN-tagged traffic differently.

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