Red Hat LINUX VIRTUAL SERVER 4.5 - ADMINISTRATION Guía de instalación descargar pdf (Pagina 71)

Choosing and Installing Guest Operating Systems

During the Red Hat Linux 9.0 installation, Red Hat 9.0 chooses a kernel that is

optimized for the specific processor on which it is running. The kernel may contain

instructions that are only available for that processor. These instructions can have

adverse effects when run on a host with the wrong type of processor.

Thus, a Red Hat Linux 9.0 virtual machine created on a host with an AMD processor

may not work if migrated to a host with an Intel processor. The reverse is also true: a

Red Hat Linux 9.0 virtual machine created on a host with an Intel processor may not

work if migrated to a host with an AMD processor.

This problem is not specific to virtual machines and would also occur on physical

computers. For example, if you moved a hard drive with a Red Hat Linux 9.0

installation from an AMD machine to an Intel machine, you would experience

problems trying to boot from that drive.

Getting a DHCP Address in a Red Hat Linux 9.0 Virtual Machine

When a Red Hat Linux 9.0 guest operating system tries to get a DHCP address, the

attempt may fail with an error message that states the link is down. On ESX Server, this

happens only if you are using the vlance driver for your network connection.

To work around this problem, become root (su -) and use a text editor to edit the

following files in the guest operating system. If only one of these files exist, make the

change for that file only.

/etc/sysconfig/network-scripts/ifcfg-eth[n]

/etc/sysconfig/networking/devices/ifcfg-eth[n]

In both cases, [n] is the number of the Ethernet adapter — for example, eth0.

Add the following section to each of these two files:

check_link_down () {

return 1;

}

Then run the command ifup eth[n] (where [n] is the number of the Ethernet

adapter) or restart the guest operating system.

Message about “Tainted” Driver

VMware ESX Server or VMware VirtualCenter: When a Red Hat Linux 9.0 guest

operating system loads the vmxnet networking driver, it reports that the driver is

tainted. This does not mean that there is anything wrong with the driver. It simply

indicates that this is a proprietary driver, not licensed under the GNU General Public

License.

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Red Hat LINUX VIRTUAL SERVER 4.5 - ADMINISTRATION Guía de instalación Pagina 71