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VMware GSX Server 2.5.2


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 Disabling and Removing NAT and HostOnly Adapters

Disabling and Removing NAT and HostOnly Adapters

When you install GSX Server, two network adapters are added to the configuration of your host operating system — one that allows the host to connect to the host-only network and one that allows the host to connect to the NAT network.

If you are not using these adapters, you may wish to remove them (users on Windows hosts can choose to disable the adapters instead of removing them). The presence of these adapters has a slight performance cost, because broadcast packets must go to the extra adapters. On Windows networks, browsing your network may be slower than usual. And in some cases, these adapters interact with the host computer's networking configuration in undesirable ways.

Disabling a Host-only or NAT Adapter on a Windows Host

Disabling a Host-only or NAT Adapter on a Windows Host

Windows Server 2003 Hosts

  1. Choose Start > Settings > Control Panel.

  2. Double-click Network and Dial-up Settings.

  3. Right-click the VMware Virtual Ethernet Adapter you want to disable. The host-only adapter is VMnet1; the NAT adapter is VMnet8.

  4. In the pop-up menu, choose Properties.

  5. Click Configure.

  6. In the Device Usage pull-down list choose Disable from this HW profile.

Windows 2000 Hosts

  1. Choose Start > Settings > Network and Dial-up Connections.

  2. Right-click the VMware Virtual Ethernet Adapter you want to disable. The host-only adapter is VMnet1; the NAT adapter is VMnet8.

  3. In the pop-up menu, select Disable.

Windows NT Hosts

  1. Choose Start > Settings > Control Panel.

  2. Double-click Network.

  3. Click the Bindings tab.

  4. Choose All adapters.

  5. Select the VMware Virtual Ethernet Adapter you want to disable. The host-only adapter is VMnet1; the NAT adapter is VMnet8. Click Disable.

Removing a Host-only or NAT Adapter on a Windows Host

Removing a Host-only or NAT Adapter on a Windows Host

  1. Log on as a member of the Administrators group.

  2. Open a command prompt.

  3. Change to the GSX Server program folder.
    cd \Program Files\VMware\VMware GSX Server

  4. Run the appropriate command to remove the adapter or adapters you want to uninstall.

    To remove the host adapter for the host-only network:
    vmware_netinstall -r *VMnet1

    To remove the host adapter for the NAT network:
    vmware_netinstall -r *VMnet8

    To remove all host-only adapters:
    vmware_netinstall -d

    When the last host-only adapter is uninstalled, the VMnetDHCP service is also uninstalled automatically.

To uninstall the NAT service, take the following steps.

  1. Log on as a member of the Administrators group.

  2. Open a command prompt.

  3. Change to the host's system32 folder.

    cd \WINNT\system32

    If your computer uses a different path for this folder, adjust the command appropriately.

  4. Run the uninstall command.
    vmnat -Uninstall

Removing a Host-only or NAT Adapter on a Linux Host

Removing a Host-only or NAT Adapter on a Linux Host

  1. Become root and run the GSX Server configuration program.
    su -
    vmware-config.pl

  2. Watch for the following question:
    Do you want networking for your Virtual Machines? (yes/no/help) [yes]

    Answer Yes if you still want to use any networking in your virtual machines, then continue to the next question.

    Otherwise, answer No to remove all networking.

  3. If you answer Yes, the program prompts you to select the wizard or editor to edit your network configuration.

    Would you prefer to modify your existing networking configuration using the wizard or the editor? (wizard/ editor/help) [wizard] editor

    Select editor. This is the only way to delete virtual network adapters without removing all of them.

  4. You see a list of virtual network adapters that have been configured. Select the adapter you wish to disable.

    The following virtual networks have been defined:

    . vmnet0 is bridged to eth0
    . vmnet1 is a host-only network on subnet 172.16.155.0.
    . vmnet8 is NAT network on a private subnet 172.16.107.0.

    Which virtual network do you wish to configure? (0-99) 1

  5. You may be prompted to keep this virtual network. If you are sure you want to remove it, answer Yes to the question.

    The network vmnet1 has been reserved for a host-only network. You may change it, but it is highly recommended that you use it as a host-only network. Are you sure you want to modify it? (yes/no) [no] yes

  6. When prompted about the type of virtual network, select None and the virtual network will be removed.

    What type of virtual network do you wish to set vmnet1? (bridged,hostonly,nat,none) [hostonly] none

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