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docs: Rewrite documentation for network device models 

Since libvirt now tries to interpret network device models (unless an
unknow model is used) the documentation didn't make a good job
specifying what is supported.

Rewrite the docs to explicitly list the models which we do parse.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Jonathon Jongsma <jjongsma@redhat.com>
This commit is contained in:
Peter Krempa 2024-04-03 12:49:09 +02:00
parent c09f84cb9c
commit 450493e0dd
1 changed files with 16 additions and 13 deletions
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29
docs/formatdomain.rst
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@ -5598,23 +5598,26 @@ Setting the NIC model
...
For hypervisors which support this, you can set the model of emulated network
interface card.
interface card via the ``model`` element.
The values for ``type`` aren't defined specifically by libvirt, but by what the
underlying hypervisor supports (if any). For QEMU and KVM you can get a list of
supported models with these commands:
While libvirt accepts any value as the ``type`` and passes it to the
hypervisor to preserve compatibility, most devices nowadays have additional
handling and address allocation which may not work properly unless the model
is known by libvirt.
Libvirt supports natively the following network device models:
``virtio``, ``virtio-transitional`` (:since:`Since 5.2.0`),
``virtio-non-transitional`` (:since:`Since 5.2.0`), ``e1000``, ``e1000e``,
``igb`` (:since:`Since 9.3.0`), ``rtl8139``, ``netfront``,
``usb-net`` (:since:`Since 10.3.0`), ``spapr-vlan``, ``lan9118``, ``scm91c111``,
``vlance``, ``vmxnet``, ``vmxnet2``, ``vmxnet3``, ``Am79C970A``, ``Am79C973``,
``82540EM``, ``82545EM``, ``82543GC``.
For QEMU you can get a list of supported models with this command:
::
qemu -net nic,model=? /dev/null
qemu-kvm -net nic,model=? /dev/null
Typical values for QEMU and KVM include: ne2k_isa i82551 i82557b i82559er
ne2k_pci pcnet rtl8139 e1000 virtio. :since:`Since 5.2.0`,
``virtio-transitional`` and ``virtio-non-transitional`` values are supported.
See `Virtio transitional devices`_ for more details.
:since:`Since 9.3.0` igb is also supported.
:since:`Since 10.3.0` usb-net is supported.
qemu-system-x86_64 -net nic,model=?
Setting NIC driver-specific options
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^