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NIC traffic not passing through from host to guest

Source: microsoft.public.virtualpc
Sent: 01/22/2005
From: MollyK
Message:

we are running an application on virtual pc that requires us to monitor
traffic on one of the nics on the host machine. I have verified that we are
using the correct nic, but I do not see all the traffic on the guest nic as
on the host.
so basically this is the setup:
we are using 2 nics from the host, one with the IP (that is set on the
virtual pc with a different IP) and the other with the traffic we want to
monitor.

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Related Messages

RE: NIC traffic not passing through from host to guest

Sent: 01/22/2005
From: MollyK
Message:

sorry... some additional information I forgot to mention. both host and guest
are XP Professional
thank you.

"MollyK" wrote:

Show quoted text

> we are running an application on virtual pc that requires us to monitor
> traffic on one of the nics on the host machine. I have verified that we are
> using the correct nic, but I do not see all the traffic on the guest nic as
> on the host.
> so basically this is the setup:
> we are using 2 nics from the host, one with the IP (that is set on the
> virtual pc with a different IP) and the other with the traffic we want to
> monitor.

Re: NIC traffic not passing through from host to guest

Sent: 01/24/2005
From: "Ben Armstrong [MSFT]" <(email address - cut out)>
Message:

Hi MollyK,

If by "monitor" you mean that the card needs to go into promiscuous mode
and see all the packets going by - then this will not work inside of the
virtual machine in the way that you want to. From a topological point
of view the virtual machine is connected to a virtual switch - which is
bridged to the host network card. Putting the virtual network card into
promiscuous mode will not allow you to see arbitrary traffic on the
other side of the bridge.
--
Cheers,
Benjamin Armstrong
===============================
Virtual machine Program Manager

This posting is provided "AS IS" with no warranties, and confers no rights.
You assume all risk for your use.

MollyK wrote:

Show quoted text

> sorry... some additional information I forgot to mention. both host and guest
> are XP Professional
> thank you.
>
> "MollyK" wrote:
>
>
>>we are running an application on virtual pc that requires us to monitor
>>traffic on one of the nics on the host machine. I have verified that we are
>>using the correct nic, but I do not see all the traffic on the guest nic as
>>on the host.
>>so basically this is the setup:
>>we are using 2 nics from the host, one with the IP (that is set on the
>>virtual pc with a different IP) and the other with the traffic we want to
>>monitor.

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