[Winpcap-users] WinPcap, VMWare and Packet Loss

[Gianluca Varenni]

----- Original Message ----- 
From: "Max WhoTheHellCares" <krakazzyabra at gmail.com>
To: <winpcap-users at winpcap.org>
Sent: Wednesday, March 04, 2009 10:01 AM
Subject: Re: [Winpcap-users] WinPcap, VMWare and Packet Loss


> Hi,
>
> The NICs are 1Gb, but my program's throughput is nearly 100Mb.

The virtual ones are probably 100Mbps, right?

> I'm not sure if i installed VMWare tools... could it possibly improve
> current situation ?

Definitely. They are optimized to work in a virtual environment.

GV

>
> Thanks!
>
> 2009/3/4 Gianluca Varenni <gianluca.varenni at cacetech.com>:
>> What is the traffic rate we are talking about?
>> Also, have you installed the VMware tools in the guest?
>>
>> Have a nice day
>> GV
>> ----- Original Message -----
>> From: "Max WhoTheHellCares" <krakazzyabra at gmail.com>
>> To: <winpcap-users at winpcap.org>
>> Sent: Tuesday, March 03, 2009 12:45 PM
>> Subject: Re: [Winpcap-users] WinPcap, VMWare and Packet Loss
>>
>>
>> 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.
>>> _______________________________________________
>>> Winpcap-users mailing list
>>> Winpcap-users at winpcap.org
>>> https://www.winpcap.org/mailman/listinfo/winpcap-users
>>>
>>> _______________________________________________
>>> Winpcap-users mailing list
>>> Winpcap-users at winpcap.org
>>> https://www.winpcap.org/mailman/listinfo/winpcap-users
>>>
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