> Hi -
>
> We have a W2K3 R2 Enterprise Edition server with a dual quad core Xeon and
> 16 GB ram running Virtual Server 2005 R2. It is running 5 Virtual Machines.
>
> Every so often one of the virtual machines, always the same one, will hang.
> It is non responsive to input. It stops responding to heart beats, and there
> is no network i/o or disk i/o. The only way to get it to respond is to reset
> it or turn it off.
>
> We tried deleting the entire VM and re-creating it. The new VM does the
> exact same thing.
>
> The VM is running W2K8 with RRAS and NAT roles, and two network interfaces.
>
> We are at a loss for what to do, and I haven't been able to find anything on
> the Internet to explain this.
>
> Any ideas?

> Note, we have other W2K8 VMs running without a problem. We are also
> running
> several W2K3 R2 VMs without a problem as well.
>
> "Justin" wrote:
>
>> Hi -
>>
>> We have a W2K3 R2 Enterprise Edition server with a dual quad core Xeon
>> and
>> 16 GB ram running Virtual Server 2005 R2. It is running 5 Virtual
>> Machines.
>>
>> Every so often one of the virtual machines, always the same one, will
>> hang.
>> It is non responsive to input. It stops responding to heart beats, and
>> there
>> is no network i/o or disk i/o. The only way to get it to respond is to
>> reset
>> it or turn it off.
>>
>> We tried deleting the entire VM and re-creating it. The new VM does the
>> exact same thing.
>>
>> The VM is running W2K8 with RRAS and NAT roles, and two network
>> interfaces.
>>
>> We are at a loss for what to do, and I haven't been able to find anything
>> on
>> the Internet to explain this.
>>
>> Any ideas?

> What does the networking look like on your physical server? Are all your VMs
> sharing the same NIC? Or does each one have a dedicated physical NIC to
> connect to? It's really easy to have an overloaded NIC cause these kinds of
> issues, and that particular VM is performing a role where it would be very
> sensitive to it.
>
> Also, you'll likely want to make sure that any physical NICs involved have
> their advanced properties (TCP Offload, Tophat, etc.) turned OFF in the
> registry.
>
> --
> Charlie.
> http://msmvps.com/blogs/xperts64
> http://mvp.support.microsoft.com/profile/charlie.russel
>
> "Justin" <(email address - cut out)> wrote in message
> news:(email address - cut out)...
> > Note, we have other W2K8 VMs running without a problem. We are also
> > running
> > several W2K3 R2 VMs without a problem as well.
> >
> > "Justin" wrote:
> >
> >> Hi -
> >>
> >> We have a W2K3 R2 Enterprise Edition server with a dual quad core Xeon
> >> and
> >> 16 GB ram running Virtual Server 2005 R2. It is running 5 Virtual
> >> Machines.
> >>
> >> Every so often one of the virtual machines, always the same one, will
> >> hang.
> >> It is non responsive to input. It stops responding to heart beats, and
> >> there
> >> is no network i/o or disk i/o. The only way to get it to respond is to
> >> reset
> >> it or turn it off.
> >>
> >> We tried deleting the entire VM and re-creating it. The new VM does the
> >> exact same thing.
> >>
> >> The VM is running W2K8 with RRAS and NAT roles, and two network
> >> interfaces.
> >>
> >> We are at a loss for what to do, and I haven't been able to find anything
> >> on
> >> the Internet to explain this.
> >>
> >> Any ideas?
>
>

> Hi Charlie -
>
> Host machine has two connections, one to Internet and one to Interal LAN.
>
> Each of the VMs has a connection to Internal LAN. This VM has one
> additional
> connection to the Internet NIC.
>
> On the host machine, TCPIP is disabled on the Internet NIC, as is
> everything
> except Virtual Machine sharing..
>
> "Charlie Russel - MVP" wrote:
>
>> What does the networking look like on your physical server? Are all your
>> VMs
>> sharing the same NIC? Or does each one have a dedicated physical NIC to
>> connect to? It's really easy to have an overloaded NIC cause these kinds
>> of
>> issues, and that particular VM is performing a role where it would be
>> very
>> sensitive to it.
>>
>> Also, you'll likely want to make sure that any physical NICs involved
>> have
>> their advanced properties (TCP Offload, Tophat, etc.) turned OFF in the
>> registry.
>>
>> --
>> Charlie.
>> http://msmvps.com/blogs/xperts64
>> http://mvp.support.microsoft.com/profile/charlie.russel
>>
>> "Justin" <(email address - cut out)> wrote in message
>> news:(email address - cut out)...
>> > Note, we have other W2K8 VMs running without a problem. We are also
>> > running
>> > several W2K3 R2 VMs without a problem as well.
>> >
>> > "Justin" wrote:
>> >
>> >> Hi -
>> >>
>> >> We have a W2K3 R2 Enterprise Edition server with a dual quad core Xeon
>> >> and
>> >> 16 GB ram running Virtual Server 2005 R2. It is running 5 Virtual
>> >> Machines.
>> >>
>> >> Every so often one of the virtual machines, always the same one, will
>> >> hang.
>> >> It is non responsive to input. It stops responding to heart beats, and
>> >> there
>> >> is no network i/o or disk i/o. The only way to get it to respond is to
>> >> reset
>> >> it or turn it off.
>> >>
>> >> We tried deleting the entire VM and re-creating it. The new VM does
>> >> the
>> >> exact same thing.
>> >>
>> >> The VM is running W2K8 with RRAS and NAT roles, and two network
>> >> interfaces.
>> >>
>> >> We are at a loss for what to do, and I haven't been able to find
>> >> anything
>> >> on
>> >> the Internet to explain this.
>> >>
>> >> Any ideas?
>>
>>

> Well, if all your machines are sharing a single NIC for the internal LAN,
> you're definitely pushing up against some problems there. The general rule
> for a production system is one physical NIC for one virtual NIC. I'd start
> by adding at least one extra physical NIC, put it on the same subnet as the
> Internal LAN, and connect the problem VM to that new NIC. NICs, even server
> quality NICs, are relatively inexpensive. (I've started ordering physical
> machines that will be VM hosts with quad-NIC PCIe or PCI-X cards in them,
> especially as we move to the faster synthetic virtual NICs of Hyper-V.)
>
> --
> Charlie.
> http://msmvps.com/blogs/xperts64
> http://mvp.support.microsoft.com/profile/charlie.russel
>
> "Justin" <(email address - cut out)> wrote in message
> news:(email address - cut out)...
> > Hi Charlie -
> >
> > Host machine has two connections, one to Internet and one to Interal LAN.
> >
> > Each of the VMs has a connection to Internal LAN. This VM has one
> > additional
> > connection to the Internet NIC.
> >
> > On the host machine, TCPIP is disabled on the Internet NIC, as is
> > everything
> > except Virtual Machine sharing..
> >
> > "Charlie Russel - MVP" wrote:
> >
> >> What does the networking look like on your physical server? Are all your
> >> VMs
> >> sharing the same NIC? Or does each one have a dedicated physical NIC to
> >> connect to? It's really easy to have an overloaded NIC cause these kinds
> >> of
> >> issues, and that particular VM is performing a role where it would be
> >> very
> >> sensitive to it.
> >>
> >> Also, you'll likely want to make sure that any physical NICs involved
> >> have
> >> their advanced properties (TCP Offload, Tophat, etc.) turned OFF in the
> >> registry.
> >>
> >> --
> >> Charlie.
> >> http://msmvps.com/blogs/xperts64
> >> http://mvp.support.microsoft.com/profile/charlie.russel
> >>
> >> "Justin" <(email address - cut out)> wrote in message
> >> news:(email address - cut out)...
> >> > Note, we have other W2K8 VMs running without a problem. We are also
> >> > running
> >> > several W2K3 R2 VMs without a problem as well.
> >> >
> >> > "Justin" wrote:
> >> >
> >> >> Hi -
> >> >>
> >> >> We have a W2K3 R2 Enterprise Edition server with a dual quad core Xeon
> >> >> and
> >> >> 16 GB ram running Virtual Server 2005 R2. It is running 5 Virtual
> >> >> Machines.
> >> >>
> >> >> Every so often one of the virtual machines, always the same one, will
> >> >> hang.
> >> >> It is non responsive to input. It stops responding to heart beats, and
> >> >> there
> >> >> is no network i/o or disk i/o. The only way to get it to respond is to
> >> >> reset
> >> >> it or turn it off.
> >> >>
> >> >> We tried deleting the entire VM and re-creating it. The new VM does
> >> >> the
> >> >> exact same thing.
> >> >>
> >> >> The VM is running W2K8 with RRAS and NAT roles, and two network
> >> >> interfaces.
> >> >>
> >> >> We are at a loss for what to do, and I haven't been able to find
> >> >> anything
> >> >> on
> >> >> the Internet to explain this.
> >> >>
> >> >> Any ideas?
> >>
> >>
>
>

>
> Hi Charlie -
>
> Thanks. Any suggestions for professional server quality NICs? This is a
> Dell
> poweredge server with a 2 port intel gigabit nic right now.
>
> Justin
>
> "Charlie Russel - MVP" wrote:
>
>> Well, if all your machines are sharing a single NIC for the internal LAN,
>> you're definitely pushing up against some problems there. The general
>> rule
>> for a production system is one physical NIC for one virtual NIC. I'd
>> start
>> by adding at least one extra physical NIC, put it on the same subnet as
>> the
>> Internal LAN, and connect the problem VM to that new NIC. NICs, even
>> server
>> quality NICs, are relatively inexpensive. (I've started ordering physical
>> machines that will be VM hosts with quad-NIC PCIe or PCI-X cards in them,
>> especially as we move to the faster synthetic virtual NICs of Hyper-V.)
>>
>> --
>> Charlie.
>> http://msmvps.com/blogs/xperts64
>> http://mvp.support.microsoft.com/profile/charlie.russel
>>
>> "Justin" <(email address - cut out)> wrote in message
>> news:(email address - cut out)...
>> > Hi Charlie -
>> >
>> > Host machine has two connections, one to Internet and one to Interal
>> > LAN.
>> >
>> > Each of the VMs has a connection to Internal LAN. This VM has one
>> > additional
>> > connection to the Internet NIC.
>> >
>> > On the host machine, TCPIP is disabled on the Internet NIC, as is
>> > everything
>> > except Virtual Machine sharing..
>> >
>> > "Charlie Russel - MVP" wrote:
>> >
>> >> What does the networking look like on your physical server? Are all
>> >> your
>> >> VMs
>> >> sharing the same NIC? Or does each one have a dedicated physical NIC
>> >> to
>> >> connect to? It's really easy to have an overloaded NIC cause these
>> >> kinds
>> >> of
>> >> issues, and that particular VM is performing a role where it would be
>> >> very
>> >> sensitive to it.
>> >>
>> >> Also, you'll likely want to make sure that any physical NICs involved
>> >> have
>> >> their advanced properties (TCP Offload, Tophat, etc.) turned OFF in
>> >> the
>> >> registry.
>> >>
>> >> --
>> >> Charlie.
>> >> http://msmvps.com/blogs/xperts64
>> >> http://mvp.support.microsoft.com/profile/charlie.russel
>> >>
>> >> "Justin" <(email address - cut out)> wrote in message
>> >> news:(email address - cut out)...
>> >> > Note, we have other W2K8 VMs running without a problem. We are also
>> >> > running
>> >> > several W2K3 R2 VMs without a problem as well.
>> >> >
>> >> > "Justin" wrote:
>> >> >
>> >> >> Hi -
>> >> >>
>> >> >> We have a W2K3 R2 Enterprise Edition server with a dual quad core
>> >> >> Xeon
>> >> >> and
>> >> >> 16 GB ram running Virtual Server 2005 R2. It is running 5 Virtual
>> >> >> Machines.
>> >> >>
>> >> >> Every so often one of the virtual machines, always the same one,
>> >> >> will
>> >> >> hang.
>> >> >> It is non responsive to input. It stops responding to heart beats,
>> >> >> and
>> >> >> there
>> >> >> is no network i/o or disk i/o. The only way to get it to respond is
>> >> >> to
>> >> >> reset
>> >> >> it or turn it off.
>> >> >>
>> >> >> We tried deleting the entire VM and re-creating it. The new VM does
>> >> >> the
>> >> >> exact same thing.
>> >> >>
>> >> >> The VM is running W2K8 with RRAS and NAT roles, and two network
>> >> >> interfaces.
>> >> >>
>> >> >> We are at a loss for what to do, and I haven't been able to find
>> >> >> anything
>> >> >> on
>> >> >> the Internet to explain this.
>> >> >>
>> >> >> Any ideas?
>> >>
>> >>
>>
>>