Symptoms:

• Virtual machine does not have network connectivity.
• Virtual machine cannot connect to the network.

VMware ESXi 4.1.x Embedded
VMware vCenter Server 5.0.x
VMware vSphere ESXi 5.0
VMware ESX 4.1.x
VMware ESX Server 3.0.x
VMware vCenter Server 4.1.x
VMware VirtualCenter 2.0.x
VMware ESX Server 2.5.x
VMware ESXi 3.5.x Embedded
VMware ESX 4.0.x
VMware VirtualCenter 2.5.x
VMware ESX Server 3.5.x
VMware ESXi 3.5.x Installable
VMware ESXi 4.0.x Embedded
VMware vCenter Server 4.0.x
VMware ESXi 4.0.x Installable
VMware ESXi 4.1.x Installable

1. Verify that the virtual network adapter is present and enabled:
   1. Click Start > Run.
   2. Execute:
      
      devmgmt.msc
      
      
   3. Click on the + next to Network adapters to ensure that there is an entry and that it is enabled.
      
      If Network adapters is not present, there may not be a virtual network adapter connected to the virtual machine. For more information, see Verifying virtual network adapter is present and connected to virtual machine (1003786).
      
      
2. Verify that the network is enabled:
   1. Click Start > Run.
   2. Execute:
      
      control
      
      
   3. Click Network Connections and verify that the Local Area Connection is enabled and its status is Connected.
      
      
3. Verify the proper TCP/IP settings.
   1. Right-click the Local Area Connection and click Properties.
   2. Highlight Internet Protocol (TCP/IP) and click Properties.
   3. Please check with your Network administrator if the IP address, Subnet mask, Default gateway, and DNS servers are correct. Change them if necessary.

For related information, see Troubleshooting virtual machine network connection issues (1003893). Windows ベースのゲスト オペレーティング システム内のネットワークの確認