2018-08-31 14:21:34 +00:00
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html>
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<html xmlns="http://www.w3.org/1999/xhtml">
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<body>
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<h1>Network XML format</h1>
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<ul id="toc">
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</ul>
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<p>
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This page provides an introduction to the network port XML format.
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2019-06-17 15:49:32 +00:00
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This stores information about the connection between a virtual
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interface of a virtual domain, and the virtual network it is
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2018-08-31 14:21:34 +00:00
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attached to.
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</p>
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<h2><a id="elements">Element and attribute overview</a></h2>
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<p>
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The root element required for all virtual network ports is
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named <code>networkport</code> and has no configurable attributes
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The network port XML format is available <span class="since">since
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5.5.0</span>
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</p>
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<h3><a id="elementsMetadata">General metadata</a></h3>
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<p>
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The first elements provide basic metadata about the virtual
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network port.
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</p>
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<pre>
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<networkport
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<uuid>7ae63b5f-fe96-4af0-a7c3-da04ba1b3f54</uuid>
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<owner>
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<uuid>06578fc1-c686-46fa-bc2c-220893b466a6</uuid>
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<name>myguest<name>
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</owner>
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<group>webfront<group>
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<mac address='52:54:0:7b:35:93'/>
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...</pre>
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<dl>
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<dt><code>uuid</code></dt>
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<dd>The content of the <code>uuid</code> element provides
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a globally unique identifier for the virtual network port.
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The format must be RFC 4122 compliant, eg <code>3e3fce45-4f53-4fa7-bb32-11f34168b82b</code>.
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If omitted when defining/creating a new network port, a random
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UUID is generated.</dd>
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<dd>The <code>owner</code> node records the domain object that
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is the owner of the network port. It contains two child nodes:
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<dl>
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<dt><code>uuid</code></dt>
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<dd>The content of the <code>uuid</code> element provides
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a globally unique identifier for the virtual domain.</dd>
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<dt><code>name</code></dt>
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<dd>The unique name of the virtual domain</dd>
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</dl>
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</dd>
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<dt><code>group</code></dt>
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<dd>The port group in the virtual network to which the
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port belongs. Can be omitted if no port groups are
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defined on the network.</dd>
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<dt><code>mac</code></dt>
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<dd>The <code>address</code> attribute provides the MAC
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address of the virtual port that will be see by the
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guest. The MAC address must not start with 0xFE as this
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byte is reserved for use on the host side of the port.
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</dd>
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</dl>
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<h3><a id="elementsCommon">Common elements</a></h3>
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<p>
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The following elements are common to one or more of the plug
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types listed later
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</p>
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<pre>
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...
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<bandwidth>
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<inbound average='1000' peak='5000' floor='200' burst='1024'/>
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<outbound average='128' peak='256' burst='256'/>
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</bandwidth>
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<rxfilters trustGuest='yes'/>
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<port isolated='yes'/>
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<virtualport type='802.1Qbg'>
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<parameters managerid='11' typeid='1193047' typeidversion='2'/>
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</virtualport>
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...</pre>
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<dl>
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<dt><code>bandwidth</code></dt>
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<dd>This part of the network port XML provides setting quality of service.
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Incoming and outgoing traffic can be shaped independently.
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The <code>bandwidth</code> element and its child elements are described
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in the <a href="formatnetwork.html#elementQoS">QoS</a> section of
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the Network XML. In addition the <code>classID</code> attribute may
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exist to provide the ID of the traffic shaping class that is active.
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</dd>
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<dt><code>rxfilters</code></dt>
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<dd>The <code>rxfilters</code> element property
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<code>trustGuest</code> provides the
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capability for the host to detect and trust reports from the
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guest regarding changes to the interface mac address and receive
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filters by setting the attribute to <code>yes</code>. The default
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setting for the attribute is <code>no</code> for security
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reasons and support depends on the guest network device model as
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well as the type of connection on the host - currently it is
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only supported for the virtio device model and for macvtap
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connections on the host.
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</dd>
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<dt><code>port</code></dt>
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<dd> <span class="since">Since 6.1.0.</span>
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The <code>port</code> element property
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<code>isolated</code>, when set to <code>yes</code> (default
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setting is <code>no</code>) is used to isolate this port's
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network traffic from other ports on the same network that also
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have <code><port isolated='yes'/></code>. This setting
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is only supported for emulated network devices connected to a
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Linux host bridge via a standard tap device.
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</dd>
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<dt><code>virtualport</code></dt>
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<dd>The <code>virtualport</code> element describes metadata that
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needs to be provided to the underlying network subsystem. It
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is described in the domain XML
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<a href="formatdomain.html#elementsNICS">interface documentation</a>.
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</dd>
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</dl>
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<h3><a id="elementsPlug">Plugs</a></h3>
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<p>
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The <code>plug</code> element has varying content depending
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on the value of the <code>type</code> attribute.
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</p>
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<h4><a id="elementsPlugNetwork">Network</a></h4>
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<p>
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The <code>network</code> plug type refers to a managed virtual
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network plug that is based on a traditional software bridge
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device privately managed by libvirt.
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</p>
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<pre>
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...
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<plug type='network' bridge='virbr0'/>
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...</pre>
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<p>
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The <code>bridge</code> attribute provides the name of the
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privately managed bridge device associated with the virtual
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network.
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</p>
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<h4><a id="elementsPlugNetwork">Bridge</a></h4>
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<p>
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The <code>bridge</code> plug type refers to an externally
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managed traditional software bridge.
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</p>
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<pre>
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...
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<plug type='bridge' bridge='br2'/>
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...</pre>
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<p>
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The <code>bridge</code> attribute provides the name of the
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externally managed bridge device associated with the virtual
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network.
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</p>
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<h4><a id="elementsPlugNetwork">Direct</a></h4>
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<p>
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The <code>direct</code> plug type refers to a connection
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directly to a physical network interface.
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</p>
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<pre>
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...
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<plug type='direct' dev='ens3' mode='vepa'/>
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...</pre>
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<p>
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The <code>dev</code> attribute provides the name of the
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physical network interface to which the port will be
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connected. The <code>mode</code> attribute describes
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how the connection will be setup and takes the same
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values described in the
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<a href="formatdomain.html#elementsNICSDirect">domain XML</a>.
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</p>
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<h4><a id="elementsPlugNetwork">Host PCI</a></h4>
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<p>
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The <code>hostdev-pci</code> plug type refers to the
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passthrough of a physical PCI device rather than emulation.
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</p>
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<pre>
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...
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<plug type='hostdev-pci' managed='yes'>
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<driver name='vfio'/>
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<address domain='0x0001' bus='0x02' slot='0x03' function='0x4'/>
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</plug>
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...</pre>
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<p>
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The <code>managed</code> attribute indicates who is responsible for
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managing the PCI device in the host. When set to the value <code>yes</code>
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libvirt is responsible for automatically detaching the device from host
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drivers and resetting it if needed. If the value is <code>no</code>,
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some other party must ensure the device is not attached to any
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host drivers.
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</p>
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</body>
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</html>
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