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<DIV><FONT face=Calibri>Packet duplication is usually caused by the virtual NIC
drivers of vmware (or in any case their networking virtualization layer). I've
seen this kind of problems with vmware workstation, but I've never used vCenter
(which I believe is just a management tool for a cloud of VMs using VMware
server or something similar).</FONT></DIV>
<DIV><FONT face=Calibri></FONT> </DIV>
<DIV><FONT face=Calibri>Have a nice day</FONT></DIV>
<DIV><FONT face=Calibri>GV</FONT></DIV>
<DIV style="FONT: 10pt Tahoma">
<DIV><BR></DIV>
<DIV style="BACKGROUND: #f5f5f5">
<DIV style="font-color: black"><B>From:</B> <A title=rouli.net@gmail.com
href="mailto:rouli.net@gmail.com">rouli</A> </DIV>
<DIV><B>Sent:</B> Thursday, May 13, 2010 8:31 AM</DIV>
<DIV><B>To:</B> <A title=gianluca.varenni@cacetech.com
href="mailto:gianluca.varenni@cacetech.com">Gianluca Varenni</A> </DIV>
<DIV><B>Cc:</B> <A
title="mailto:winpcap-users@winpcap.org CTRL + Click to follow link"
href="mailto:winpcap-users@winpcap.org">winpcap-users</A> </DIV>
<DIV><B>Subject:</B> Re: [Winpcap-users] Injected packets are duplicated on
vmware</DIV></DIV></DIV>
<DIV><BR></DIV>
<DIV dir=ltr>vCenter 4.0.0<BR>After some digging, I don't believe the problem is
with the VMWare, but rather with vista.<BR>I have installed the same vista image
on a physical machine, and still see packet duplication.<BR><BR>Since it's only
got Service Pack 1 installed, I'm now installing Service Pack 2 and will check
whether the problem persists.<BR><BR><BR><BR><BR><BR>
<DIV class=gmail_quote>On Thu, May 13, 2010 at 5:59 PM, Gianluca Varenni <SPAN
dir=ltr><<A
title="mailto:gianluca.varenni@cacetech.com CTRL + Click to follow link"
href="mailto:gianluca.varenni@cacetech.com">gianluca.varenni@cacetech.com</A>></SPAN>
wrote:<BR>
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<DIV><FONT face=Calibri>Which version of vmware are you using?</FONT></DIV>
<DIV><FONT face=Calibri></FONT> </DIV>
<DIV><FONT face=Calibri>Have a nice day</FONT></DIV>
<DIV><FONT face=Calibri>GV</FONT></DIV>
<DIV style="FONT: 10pt Tahoma">
<DIV><BR></DIV>
<DIV style="BACKGROUND: rgb(245,245,245)">
<DIV><B>From:</B> <A title=rouli.net@gmail.com
href="mailto:rouli.net@gmail.com" target=_blank>rouli</A> </DIV>
<DIV><B>Sent:</B> Thursday, May 13, 2010 6:04 AM</DIV>
<DIV><B>To:</B> <A title=winpcap-users@winpcap.org
href="mailto:winpcap-users@winpcap.org" target=_blank>winpcap-users</A> </DIV>
<DIV><B>Subject:</B> [Winpcap-users] Injected packets are duplicated on
vmware</DIV></DIV></DIV>
<DIV>
<DIV></DIV>
<DIV class=h5>
<DIV><BR></DIV>
<DIV dir=ltr>I'm trying to figure out a setup issue and would appreciate any
help.<BR>I have a vista virtual machine and a program that injects packet to
the network using winpcap.<BR>Every injected packet is duplicated, where the
second packet is the exact copy of the original packet but only the IP's
checksum and TTL are changed (TTL decreased by one).<BR>For example, if I
inject an ICMP echo request using winpcap, the target machine actually gets
two requests.<BR><BR>The duplication happens on the vista machine - I've
validated this by using wireshark.<BR><BR>Any ideas of what can cause such an
issue?<BR><BR>Thanks</DIV></DIV></DIV>
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