Microsoft KB Archive/897753

= You cannot establish network connectivity to a virtual machine in Virtual Server 2005 after you disable and then re-enable the network adaptor on the host computer =

Article ID: 897753

Article Last Modified on 11/2/2007

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APPLIES TO


 * Microsoft Virtual Server 2005 Standard Edition

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SYMPTOMS
In Microsoft Virtual Server 2005, when you disable the network adaptor on the host computer, network connectivity between the host computer and a running virtual machine is broken. You expect this to occur. However, when you re-enable the network adaptor on the host computer, network connectivity with the virtual machine is not restored. You can no longer establish network connectivity to the running virtual machine.



CAUSE
This issue occurs because the address table route that the virtual machine uses is no longer valid after you disable the network adaptor on the host computer.



RESOLUTION
To resolve this issue, use one of the following methods.

Method 1: Restart the Virtual Server service
Save the state of the virtual machine that is running in Virtual Server 2005. Then, restart the Virtual Server service. To do this, follow these steps:  Start the Virtual Server Administration Website tool. To do this, click Start, point to All Programs, point to Microsoft Virtual Server, and then click Virtual Server Administration Website. Under Virtual Machines, point to Configure, and then click the virtual machine for which you want to save the state. Next to the thumbnail image of the virtual machine, click Save State. Repeat steps 2 and 3 to save the state of all other virtual machines that are running. Restart the Virtual Server service. To do this, follow these steps:  Click Start, click Run, type services.msc, and then click OK.</li> In the Name list, right-click Virtual Server, and then click Restart.</li> Quit the Services Microsoft Management Console (MMC) snap-in.</li></ol> </li> Restore the virtual machines from their saved states. To do this, follow these steps: <ol style="list-style-type: lower-alpha;"> In the Virtual Server Administration Website tool, under Virtual Machines, point to Configure, and then click a virtual machine that you want to restore from its saved state.</li> Click the thumbnail image of the virtual machine to restore the virtual machine from its saved state.</li> When Running appears next to Virtual machine status, restore another virtual machine from its saved state. Repeat this process for all the virtual machines that you want to restore from their saved states.</li></ol> </li></ol>

Method 2: Disable and then re-enable the connection to the virtual network
Disable and then re-enable the connection to the virtual network for the virtual machines with which you experience this issue. To do this, follow these steps:
 * 1) Start the Virtual Server Administration Website tool. To do this, click Start, point to All Programs, point to Microsoft Virtual Server, and then click Virtual Server Administration Website.
 * 2) Under Virtual Networks, point to Configure, and then click the virtual network to which your virtual machine is connected.
 * 3) Click Network Settings.
 * 4) Click to clear the Connected check box that corresponds to the virtual network adaptor in the virtual machine with which you experience this issue, and then click OK.

Note If you have more than one running virtual machine connected to this network, click to clear the Connected check boxes that correspond to the virtual network adaptors in those virtual machines. You do not have to click to clear the Connected check boxes that correspond to virtual network adaptors of virtual machines that are not running.
 * 1) Click Network Settings.
 * 2) Click to select the Connected check box that you cleared in step 4, and then click OK.

Additional query words: VS 2005 VM NIC

Keywords: kbtshoot kbprb KB897753

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