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Add Solution

The case of the disappearing network interfaces

Source: microsoft.public.virtualpc
Sent: 11/02/2005
From: VPC_geek
Message:

OK -- I've been struggling with this problem for some time and can't figure
out what's going. After a period of time (sometimes as short as a day,
sometimes as long as weeks or months) an ipconfig/all from the command line
shows no interfaces.

This occurs only when Virtual Machine Network Services are installed. To get
my network interfaces back (and when they're missing, networking is down) I
have to uninstall VMNS and sometimes I have to uninstall VPC.

If I run VPC with NAT (which doesn't require VMNS), I have no issues.

The interfaces don't actually disappear, they just aren't functional. Can't
ping, can't even see what the ip address is.

Any ideas?

Thanks,

The geek

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Related Messages

RE: The case of the disappearing network interfaces

Sent: 11/02/2005
From: VPC_geek
Message:

Additional info:

VPC2004 SP1, XP SP2

Many different guests: Win2K, WinXP SP2, Fedora 3 and 4, etc.

Guest doesn't matter

Re: The case of the disappearing network interfaces

Sent: 11/02/2005
From: Steve Jain <(email address - cut out)>
Message:

On Wed, 2 Nov 2005 14:06:02 -0800, "VPC_geek"
<(email address - cut out)> wrote:

Have you done the standard VPC network troubleshooting, updated to the
most recent drivers, disabled TCP offloading, etc?

--
Cheers,
Steve Jain, Virtual Machine MVP
http://www.essjae.com/vpc/vpc.htm
"This posting is provided "AS IS" with
no warranties, and confers no rights.
You assume all risk for your use.
I am not am employee of Microsoft."

Show quoted text

>Additional info:
>
>VPC2004 SP1, XP SP2
>
>Many different guests: Win2K, WinXP SP2, Fedora 3 and 4, etc.
>
>Guest doesn't matter

Re: The case of the disappearing network interfaces

Sent: 11/02/2005
From: VPC_geek
Message:

Don't know about TCP offloading. I've tried disabling/reenabling the
interfaces. And actually, it's all interfaces that disappear. They still show
up in device manager and seem to be OK.

When it's working, it works fine. Usually the interfaces disappear (in the
host, guest is fine) after a reboot. Didn't happen when I first installed
VPC. Now it happens all of the time to the point where I just use NAT.

Re: The case of the disappearing network interfaces

Sent: 11/02/2005
From: Steve Jain <(email address - cut out)>
Message:

On Wed, 2 Nov 2005 15:35:02 -0800, "VPC_geek"
<(email address - cut out)> wrote:

If all your physical NICs disappear, it would seem that there is some
other network driver (VPN, etc) conflicting with VPC's VMNS.

--
Cheers,
Steve Jain, Virtual Machine MVP
http://www.essjae.com/vpc/vpc.htm
"This posting is provided "AS IS" with
no warranties, and confers no rights.
You assume all risk for your use.
I am not am employee of Microsoft."

Show quoted text

>Don't know about TCP offloading. I've tried disabling/reenabling the
>interfaces. And actually, it's all interfaces that disappear. They still show
>up in device manager and seem to be OK.
>
>When it's working, it works fine. Usually the interfaces disappear (in the
>host, guest is fine) after a reboot. Didn't happen when I first installed
>VPC. Now it happens all of the time to the point where I just use NAT.

Re: The case of the disappearing network interfaces

Sent: 11/02/2005
From: VPC_geek
Message:

You are probably right about the VPN conflicting with VPC. I installed a VPN
client some time ago and I think that's when the problems started. I've since
uninstalled VPN, but VPC still has the same networking issues.

Other than reimaging the machine, is there anything else that can be done?

Re: The case of the disappearing network interfaces

Sent: 11/02/2005
From: "Ben Armstrong [MSFT]" <(email address - cut out)>
Message:

Have you reinstalled VPC since uninstalling the VPN client?
--
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.

VPC_geek wrote:

Show quoted text

> You are probably right about the VPN conflicting with VPC. I installed a VPN
> client some time ago and I think that's when the problems started. I've since
> uninstalled VPN, but VPC still has the same networking issues.
>
> Other than reimaging the machine, is there anything else that can be done?

Re: The case of the disappearing network interfaces

Sent: 11/03/2005
From: VPC_geek
Message:

Yes -- many times (at least 5, maybe more).

Additional info -- I had two VPN clients -- one for my company and another
for a customer. It was after install the customer's VPN client I started
having these problem. I think it was a CheckPoint client.

Don't remember as I've uninstalled and deleted it.

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