Installation guide

Note

If you do not specify a MAC address, one will be automatically generated. The

<virtualport> element is only used when connecting to an 802.11Qbh hardware

switch. The <vlan> element is new for Red Hat Enterprise Linux 6.4 and this will

transparently put the guest's device on the VLAN tagged 42.

When the virtual machine starts, it should see a network device of the type provided by

the physical adapter, with the configured MAC address. This MAC address will remain

unchanged across host and guest reboots.

The following <interface> example shows the syntax for the optional <mac

address>, <virtualport>, and <vlan> elements. In practice, use either the <vlan>

or <virtualport> element, not both simultaneously as shown in the example:

...

...

<address type='pci' domain='0' bus='11' slot='16'

function='0'/>

</source>

<vlan>

</vlan>

</virtualport>

</interface>

...

</devices>

9. ⁠

Ad d t h e Virt u al Fu n ct io n t o t he virt ual mach in e

Add the Virtual Function to the virtual machine using the following command with the

temporary file created in the previous step. This attaches the new device immediately and

saves it for subsequent guest restarts.

virsh attach-device MyGuest /tmp/new-i nterface. xml --config

Using the --co nfi g option ensures the new device is available after future guest restarts.

The virtual machine detects a new network interface card. This new card is the Virtual Function of the

SR-IOV device.

13.3. T roubleshoot ing SR-IOV

This section contains solutions for problems which may affect SR-IOV.

⁠Chapt er 1 3. SR- IO V

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