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Proper handling of virtual servers on server with multiple NICs...

Source: microsoft.public.virtualserver
Sent: 05/29/2007
From: sketchy
Message:

Hello,

I have our Win2k3 based Exchange member server that I am planning on setting
up a virtual server on for some testing, etc. Historically, Exchange (and a
few other backend apps) just don't like a dual homed systems, so even though
it has a couple of built-in NICs, I only have one enabled/plugged in. My
question is, if I assign the new virtual server to the unused NIC, plugging
it into the network, then joining the Virtual Server to the domain, will the
primary OS and it's services get mixed up? ...Can a NIC be physically
disabled on the primary OS, yet enabled and functioning on the Virtual
Server?

I've dug around for the answer to this, but just can't find any definitive
recommendations on the handling of multiple NICs inre to Virtual servers.

--
Sketchy

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Related Messages

RE: Proper handling of virtual servers on server with multiple NICs...

Sent: 05/29/2007
From: ddosen
Message:

Or another scenario would be:

If I have a dual-homed host - with one nic having DHCP assigned addresses,
the other - fixed IP addresses. Should I be able to access the host and
guest OS's over either nic?

Are there any restrictions?

Thanks in advance for any advice.

"sketchy" wrote:

Show quoted text

> Hello,
>
> I have our Win2k3 based Exchange member server that I am planning on setting
> up a virtual server on for some testing, etc. Historically, Exchange (and a
> few other backend apps) just don't like a dual homed systems, so even though
> it has a couple of built-in NICs, I only have one enabled/plugged in. My
> question is, if I assign the new virtual server to the unused NIC, plugging
> it into the network, then joining the Virtual Server to the domain, will the
> primary OS and it's services get mixed up? ...Can a NIC be physically
> disabled on the primary OS, yet enabled and functioning on the Virtual
> Server?
>
> I've dug around for the answer to this, but just can't find any definitive
> recommendations on the handling of multiple NICs inre to Virtual servers.
>
> --
> Sketchy

Re: Proper handling of virtual servers on server with multiple NIC

Sent: 05/30/2007
From: sketchy
Message:

Thank you Bill. that was very helpfull. Just to clarify though, when you
say "if you leave the VMNS box checked, and uncheck all of the other boxes
for that extra NIC" I want to be sure that you mean that one really does
uncheck TCP/IP, Client for Microsoft Networks, and File and Printer Sharing,
for the extra NIC that is to be used under In a Virtual Server instance only.

--
Sketchy

"Bill Grant" wrote:

Show quoted text

> Yes, you can dedicate a NIC to the virtual machine or to the host.
>
> When you look at the network properties of a NIC from the host, you will
> see that there is an extra service called Virtual Machine Network Services.
> This is the extra code which allows the virtual machine to use the NIC.
>
> If you clear the check mark in the VMNS box, only the host can use that
> NIC. On the other hand if you leave it checked and clear the other boxes,
> only the vm will be able to use the NIC. No traffic will go to the host's IP
> stack from this NIC.
>
> "ddosen" <(email address - cut out)> wrote in message
> news:(email address - cut out)...
> > Or another scenario would be:
> >
> > If I have a dual-homed host - with one nic having DHCP assigned addresses,
> > the other - fixed IP addresses. Should I be able to access the host and
> > guest OS's over either nic?
> >
> > Are there any restrictions?
> >
> > Thanks in advance for any advice.
> >
> > "sketchy" wrote:
> >
> >> Hello,
> >>
> >> I have our Win2k3 based Exchange member server that I am planning on
> >> setting
> >> up a virtual server on for some testing, etc. Historically, Exchange
> >> (and a
> >> few other backend apps) just don't like a dual homed systems, so even
> >> though
> >> it has a couple of built-in NICs, I only have one enabled/plugged in. My
> >> question is, if I assign the new virtual server to the unused NIC,
> >> plugging
> >> it into the network, then joining the Virtual Server to the domain, will
> >> the
> >> primary OS and it's services get mixed up? ...Can a NIC be physically
> >> disabled on the primary OS, yet enabled and functioning on the Virtual
> >> Server?
> >>
> >> I've dug around for the answer to this, but just can't find any
> >> definitive
> >> recommendations on the handling of multiple NICs inre to Virtual servers.
> >>
> >> --
> >> Sketchy
>
>
>

Re: Proper handling of virtual servers on server with multiple NICs...

Sent: 05/30/2007
From: "Bill Grant" <not.available@online>
Message:

Yes, you can dedicate a NIC to the virtual machine or to the host.

When you look at the network properties of a NIC from the host, you will
see that there is an extra service called Virtual Machine Network Services.
This is the extra code which allows the virtual machine to use the NIC.

If you clear the check mark in the VMNS box, only the host can use that
NIC. On the other hand if you leave it checked and clear the other boxes,
only the vm will be able to use the NIC. No traffic will go to the host's IP
stack from this NIC.

"ddosen" <(email address - cut out)> wrote in message
news:(email address - cut out)...

Show quoted text

> Or another scenario would be:
>
> If I have a dual-homed host - with one nic having DHCP assigned addresses,
> the other - fixed IP addresses. Should I be able to access the host and
> guest OS's over either nic?
>
> Are there any restrictions?
>
> Thanks in advance for any advice.
>
> "sketchy" wrote:
>
>> Hello,
>>
>> I have our Win2k3 based Exchange member server that I am planning on
>> setting
>> up a virtual server on for some testing, etc. Historically, Exchange
>> (and a
>> few other backend apps) just don't like a dual homed systems, so even
>> though
>> it has a couple of built-in NICs, I only have one enabled/plugged in. My
>> question is, if I assign the new virtual server to the unused NIC,
>> plugging
>> it into the network, then joining the Virtual Server to the domain, will
>> the
>> primary OS and it's services get mixed up? ...Can a NIC be physically
>> disabled on the primary OS, yet enabled and functioning on the Virtual
>> Server?
>>
>> I've dug around for the answer to this, but just can't find any
>> definitive
>> recommendations on the handling of multiple NICs inre to Virtual servers.
>>
>> --
>> Sketchy

Re: Proper handling of virtual servers on server with multiple NIC

Sent: 05/31/2007
From: "Bill Grant" <not.available@online>
Message:

That is correct. From the host machine, the NIC is then invisible. All
traffic using this NIC will be intercepted by VMNS and will be handled by
the IP stack in the guest OS and use the MAC address of the emulated NIC in
the vm.

"sketchy" <(email address - cut out)> wrote in message
news:(email address - cut out)...

Show quoted text

> Thank you Bill. that was very helpfull. Just to clarify though, when you
> say "if you leave the VMNS box checked, and uncheck all of the other boxes
> for that extra NIC" I want to be sure that you mean that one really does
> uncheck TCP/IP, Client for Microsoft Networks, and File and Printer
> Sharing,
> for the extra NIC that is to be used under In a Virtual Server instance
> only.
>
> --
> Sketchy
>
>
> "Bill Grant" wrote:
>
>> Yes, you can dedicate a NIC to the virtual machine or to the host.
>>
>> When you look at the network properties of a NIC from the host, you
>> will
>> see that there is an extra service called Virtual Machine Network
>> Services.
>> This is the extra code which allows the virtual machine to use the NIC.
>>
>> If you clear the check mark in the VMNS box, only the host can use
>> that
>> NIC. On the other hand if you leave it checked and clear the other boxes,
>> only the vm will be able to use the NIC. No traffic will go to the host's
>> IP
>> stack from this NIC.
>>
>> "ddosen" <(email address - cut out)> wrote in message
>> news:(email address - cut out)...
>> > Or another scenario would be:
>> >
>> > If I have a dual-homed host - with one nic having DHCP assigned
>> > addresses,
>> > the other - fixed IP addresses. Should I be able to access the host
>> > and
>> > guest OS's over either nic?
>> >
>> > Are there any restrictions?
>> >
>> > Thanks in advance for any advice.
>> >
>> > "sketchy" wrote:
>> >
>> >> Hello,
>> >>
>> >> I have our Win2k3 based Exchange member server that I am planning on
>> >> setting
>> >> up a virtual server on for some testing, etc. Historically, Exchange
>> >> (and a
>> >> few other backend apps) just don't like a dual homed systems, so even
>> >> though
>> >> it has a couple of built-in NICs, I only have one enabled/plugged in.
>> >> My
>> >> question is, if I assign the new virtual server to the unused NIC,
>> >> plugging
>> >> it into the network, then joining the Virtual Server to the domain,
>> >> will
>> >> the
>> >> primary OS and it's services get mixed up? ...Can a NIC be physically
>> >> disabled on the primary OS, yet enabled and functioning on the Virtual
>> >> Server?
>> >>
>> >> I've dug around for the answer to this, but just can't find any
>> >> definitive
>> >> recommendations on the handling of multiple NICs inre to Virtual
>> >> servers.
>> >>
>> >> --
>> >> Sketchy
>>
>>
>>

Post Reply | This is Spam! | Mark as Spam

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