[Winpcap-users] Why Winpcap is not wokring with Cisco Switch?

Gianluca Varenni gianluca.varenni at cacetech.com
Mon Jan 21 19:44:11 GMT 2008

----- Original Message ----- 
From: "Jais.T.Mathew" <jais.t.mathew at gmail.com>
To: <winpcap-users at winpcap.org>
Sent: Thursday, January 17, 2008 9:45 PM
Subject: [Winpcap-users] Why Winpcap is not wokring with Cisco Switch?

> Hi,
> I developed an application that using Winpcap 4.0.1 to capture the
> packet which coming from a mirrored port or a network HUB. My
> application is using pcap APIs.
> The application is working fine with network Hub... but is not working
> with switch. I Tested in WinXP sp2 and W2k Pro . The Networking cards
> are from  RealTalk and Intel.

What do you mean by "it doesn't work"? You do not receive any packet?
It's possible that the mirrorer packets are tunneled into something like GRE 
or UDP.

Have a nice day

> I found the ethereal is working fine in the same machine .also I found
> the packetyzer (another sniffer app which uses winpcap) is not
> working.
> Can anyone give some input on this problem? Should I do anything in
> the network driver configuration?
> Thanks
> Jais.
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