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

Gianluca Varenni gianluca.varenni at cacetech.com
Fri Oct 8 14:32:14 PDT 2010

In addition to way Guy correctly pointed out, the wireshark wiki has some 
more details on capturing VLAN-tagged packets at


Have a nice day

From: "Guy Harris" <guy at alum.mit.edu>
Sent: Friday, October 08, 2010 2:02 PM
To: <winpcap-users at winpcap.org>
Subject: Re: [Winpcap-users] Vlan tagged traffic not capture on 64 

> 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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