In many Linux distributions if IPv6 is enabled, VMware Tools cannot be configured with
vmware-config-tools.pl after installation. Using which, you can automate configuration of VMware Tools in guest operating systems. With CLI you can modify VMware Tools settings, shrink virtual disks, connect and disconnect virtual devices, and more. For information on the VMware Tools configuration utility, see -
https://www.vmware.com/pdf/vmware-tools-cli.pdf. In this case, VMware Tools is unable to set the network device correctly for the virtual machine, and displays a message similar to the following:
Unloading pcnet32 module
unregister_netdevice: waiting for eth0 to become free
This message repeats continuously until you reboot the virtual machine. To prevent this problem in virtual machines running Linux, disable IPv6 before installing VMware Tools.
Note: VMware ESX 4.0 and later versions support IPv6. You need not disable IPv6 before installing VMware Tools.