[Winpcap-users] WinPcap, VMWare and Packet Loss

[Max WhoTheHellCares]

Thanks for the answers!

I upgraded winpcap to 4.0.1 - nearly 10% packets are still lost...

I'm using VMWare Workstaion 5.5.3 ,though i install Win2k3 Server on
it. And VMWares are installed on physical servers running Win2k3
Server... Could that be a problem ?
Do I need VMWare Server edition instead ?

Thanks again!

2009/3/3 Alan Jay Weiner <a.weiner at valid8.com>:
> As Gianluca posted, please upgrade to a more recent version of WinPcap.
>
> I am using VMware Workstation and WinPcap 4.0.2 without any packet loss
> problem.
>
> Currently I'm using Workstation 6.5; I have used previous 6.x versions in
> the past.
>
> I use several different configurations, including virtual NICs bridged to
> physical adapters on the host, USB adapters (Linksys and Belkin) connected
> directly to the virtual machine, and virtual NICs on virtual LANs within
> VMware.
>
> We do VoIP testers and emulators - I do all my development in VMs, and
> frequently test between my VM and emulators running in other VMs, or between
> my VM and real (VoIP) hardware.
>
> - Al Weiner -
>
>
> ----------------------------------------------------------------------------
> Alan Jay Weiner / Valid8.com, Inc. - Conform, Perform & Excel(tm)
> 500 W Cummings Park, Suite #2700, Woburn, MA 01801, USA
> a.weiner at valid8.com / Tel:+1-781-938-1221 x112, Fax +1-781-207-0550
> http://www.VALID8.com
>
>
> -----Original Message-----
> From: winpcap-users-bounces at winpcap.org
> [mailto:winpcap-users-bounces at winpcap.org] On Behalf Of Max WhoTheHellCares
> Sent: Monday, March 02, 2009 3:00 PM
> To: winpcap-users at winpcap.org
> Subject: [Winpcap-users] WinPcap, VMWare and Packet Loss
>
> Hi everybody!
>
> I have recently stumbled upon a problem, which renders my project
> nearly useless....
>
> I have 2 VMs on two physical servers, each one runs Win2k3 Server. My
> server-side program sends packets using WinPcap, the client-side gets
> them using WinPcap (lets call them Tx and Rx respectively).
> Up till now i worked without VMs - Win2k3 Server was installed on both
> physical servers. My project worked like it should - without losses
> during packet transfer from server to client.
>
> Now, as i started using VMs (Virtual NIC is BRIDGED to physical), i
> get packet loss ~11% in case Tx AND Rx are installed on VMs.
> If i install only one side (Tx OR Rx) on VM and the other one on
> physical disk(on another server), packet loss is still present, but
> varies depending on which side (Tx or Rx) is installed on VM. It goes
> like this:
>
> Transmitter      Receiver      %packet loss
> -------------------------------------------------------------
> TX                  RX               0%
> TX                  VM_RX        10%
> VM_TX            RX              0.1%
> VM_TX            VM_RX        11%
>
> where TX, RX - installed on physical machines
>         VM_TX, VM_RX - installed on virtual machines.
>
> How it works: having done extensive debug on the Tx side,
> pcap_sendpacket(...) sends everything without errors. However the Rx
> side still registers packet loss. BTW, WinPcap version is 3.1beta.
>
> Please, if someone has a clue of why this happens, share your
> thoughts, my project is on-hold ATM.
>
> Thanks in advance.
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