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        <article role="main" id="furo-main-content">
          <section id="ovn-network">
<span id="network-ovn"></span><h1>OVN network<a class="headerlink" href="#ovn-network" title="Link to this heading">¶</a></h1>
<!-- Include start OVN intro -->
<p><abbr title="Open Virtual Network">OVN</abbr> is a software-defined networking system that supports virtual network abstraction.
You can use it to build your own private cloud.
See <a class="reference external" href="https://www.ovn.org/"><code class="docutils literal notranslate"><span class="pre">www.ovn.org</span></code></a> for more information.</p>
<!-- Include end OVN intro -->
<p>The <code class="docutils literal notranslate"><span class="pre">ovn</span></code> network type allows to create logical networks using the OVN <abbr title="software-defined networking">SDN</abbr>.
This kind of network can be useful for labs and multi-tenant environments where the same logical subnets are used in multiple discrete networks.</p>
<p>A LXD OVN network can be connected to an existing managed <a class="reference internal" href="../network_bridge/#network-bridge"><span class="std std-ref">Bridge network</span></a> or <a class="reference internal" href="../network_physical/#network-physical"><span class="std std-ref">Physical network</span></a> to gain access to the wider network.
By default, all connections from the OVN logical networks are NATed to an IP allocated from the uplink network.</p>
<p>See <a class="reference internal" href="../../howto/network_ovn_setup/#network-ovn-setup"><span class="std std-ref">How to set up OVN with LXD</span></a> for basic instructions for setting up an OVN network.</p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>Static DHCP assignments depend on the client using its MAC address as the DHCP identifier.
This method prevents conflicting leases when copying an instance, and thus makes statically assigned leases work properly.</p>
</div>
<section id="ovn-networking-architecture">
<span id="network-ovn-architecture"></span><h2>OVN networking architecture<a class="headerlink" href="#ovn-networking-architecture" title="Link to this heading">¶</a></h2>
<p>The following figure shows the OVN network traffic flow in a LXD cluster:</p>
<figure class="align-default" id="id1">
<a class="reference internal image-reference" href="../../_images/ovn_networking_1.svg"><img alt="../../_images/ovn_networking_1.svg" src="../../_images/ovn_networking_1.svg" style="width: 100%;" />
</a>
<figcaption>
<p><span class="caption-text">OVN networking (one network)</span><a class="headerlink" href="#id1" title="Link to this image">¶</a></p>
</figcaption>
</figure>
<p>The OVN network connects the different cluster members.
Network traffic between the cluster members passes through the NIC for inter-cluster traffic (<code class="docutils literal notranslate"><span class="pre">eth1</span></code> in the figure) and is transmitted through an OVN tunnel.
This traffic between cluster members is referred to as <em>OVN east/west traffic</em>.</p>
<p>For outside connectivity, the OVN network requires an uplink network (a <a class="reference internal" href="../network_bridge/#network-bridge"><span class="std std-ref">Bridge network</span></a> or a <a class="reference internal" href="../network_physical/#network-physical"><span class="std std-ref">Physical network</span></a>).
The OVN network uses a virtual router to connect to the uplink network through the NIC for uplink traffic (<code class="docutils literal notranslate"><span class="pre">eth0</span></code> in the figure).
The virtual router is active on only one of the cluster members, and can move to a different member at any time.
Independent of where the router resides, the OVN network is available on all cluster members.</p>
<p>Every instance on any cluster member can connect to the OVN network through its virtual NIC (usually <code class="docutils literal notranslate"><span class="pre">eth0</span></code> for containers and <code class="docutils literal notranslate"><span class="pre">enp5s0</span></code> for virtual machines).
The traffic between the instances and the uplink network is referred to as <em>OVN north/south traffic</em>.</p>
<p>The strengths of using OVN become apparent when looking at a networking architecture with more than one OVN network:</p>
<figure class="align-default" id="id2">
<a class="reference internal image-reference" href="../../_images/ovn_networking_2.svg"><img alt="../../_images/ovn_networking_2.svg" src="../../_images/ovn_networking_2.svg" style="width: 100%;" />
</a>
<figcaption>
<p><span class="caption-text">OVN networking (two networks)</span><a class="headerlink" href="#id2" title="Link to this image">¶</a></p>
</figcaption>
</figure>
<p>In this case, both depicted OVN networks are completely independent.
Both networks are available on all cluster members (with each virtual router being active on one random cluster member).
Each instance can use either of the networks, and the traffic on either network is completely isolated from the other network.</p>
</section>
<section id="configuration-options">
<span id="network-ovn-options"></span><h2>Configuration options<a class="headerlink" href="#configuration-options" title="Link to this heading">¶</a></h2>
<p>The following configuration key namespaces are currently supported for the <code class="docutils literal notranslate"><span class="pre">ovn</span></code> network type:</p>
<ul class="simple">
<li><p><code class="docutils literal notranslate"><span class="pre">bridge</span></code> (L2 interface configuration)</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">dns</span></code> (DNS server and resolution configuration)</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">ipv4</span></code> (L3 IPv4 configuration)</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">ipv6</span></code> (L3 IPv6 configuration)</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">security</span></code> (network ACL configuration)</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">user</span></code> (free-form key/value for user metadata)</p></li>
</ul>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>LXD uses the <a class="reference external" href="https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing">CIDR notation</a> where network subnet information is required, for example, <code class="docutils literal notranslate"><span class="pre">192.0.2.0/24</span></code> or <code class="docutils literal notranslate"><span class="pre">2001:db8::/32</span></code>. This does not apply to cases where a single address is required, for example, local/remote addresses of tunnels, NAT addresses or specific addresses to apply to an instance.</p>
</div>
<p>The following configuration options are available for the <code class="docutils literal notranslate"><span class="pre">ovn</span></code> network type:</p>
<div class="configoption docutils container" id="network-ovn-network-conf:acceleration.parent">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">acceleration.parent</span></code></span><span class="shortdesc"><p>Physical function interfaces to allocate virtual functions from for hardware acceleration</p>
</span><span class="anchor"><a class="reference external" href="#network-ovn-network-conf:acceleration.parent"><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></a></span></div>
<div class="details docutils container">
<div class="table-wrapper fields docutils container">
<table class="fields docutils align-default">
<tbody>
<tr class="row-odd"><td><strong>Key: </strong></td>
<td><code class="docutils literal notranslate"><span class="pre">acceleration.parent</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>string</p>
</span></td>
</tr>
</tbody>
</table>
</div>
<p>Comma separated list of physical function (PF) interfaces to allocate virtual functions (VFs) from for hardware acceleration when <a class="configref reference internal" href="../devices_nic/#device-nic-ovn-device-conf:acceleration"><code class="docutils literal notranslate"><span class="pre">acceleration</span></code></a> is enabled.
See <a class="reference internal" href="../devices_nic/#devices-nic-hw-acceleration"><span class="std std-ref">SR-IOV hardware acceleration</span></a> for more information.</p>
</div>
</div>
<div class="configoption docutils container" id="network-ovn-network-conf:bridge.hwaddr">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">bridge.hwaddr</span></code></span><span class="shortdesc"><p>MAC address for the bridge</p>
</span><span class="anchor"><a class="reference external" href="#network-ovn-network-conf:bridge.hwaddr"><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></a></span></div>
<div class="details docutils container">
<div class="table-wrapper fields docutils container">
<table class="fields docutils align-default">
<tbody>
<tr class="row-odd"><td><strong>Key: </strong></td>
<td><code class="docutils literal notranslate"><span class="pre">bridge.hwaddr</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>string</p>
</span></td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div class="configoption docutils container" id="network-ovn-network-conf:bridge.mtu">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">bridge.mtu</span></code></span><span class="shortdesc"><p>Bridge MTU</p>
</span><span class="anchor"><a class="reference external" href="#network-ovn-network-conf:bridge.mtu"><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></a></span></div>
<div class="details docutils container">
<div class="table-wrapper fields docutils container">
<table class="fields docutils align-default">
<tbody>
<tr class="row-odd"><td><strong>Key: </strong></td>
<td><code class="docutils literal notranslate"><span class="pre">bridge.mtu</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>integer</p>
</span></td>
</tr>
<tr class="row-odd"><td><strong>Default: </strong></td>
<td><span class="ignoreP"><p><code class="docutils literal notranslate"><span class="pre">1442</span></code></p>
</span></td>
</tr>
</tbody>
</table>
</div>
<p>The default value allows the host to host Geneve tunnels.</p>
</div>
</div>
<div class="configoption docutils container" id="network-ovn-network-conf:dns.domain">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">dns.domain</span></code></span><span class="shortdesc"><p>Domain to advertise to DHCP clients and use for DNS resolution</p>
</span><span class="anchor"><a class="reference external" href="#network-ovn-network-conf:dns.domain"><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></a></span></div>
<div class="details docutils container">
<div class="table-wrapper fields docutils container">
<table class="fields docutils align-default">
<tbody>
<tr class="row-odd"><td><strong>Key: </strong></td>
<td><code class="docutils literal notranslate"><span class="pre">dns.domain</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>string</p>
</span></td>
</tr>
<tr class="row-odd"><td><strong>Default: </strong></td>
<td><span class="ignoreP"><p><code class="docutils literal notranslate"><span class="pre">lxd</span></code></p>
</span></td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div class="configoption docutils container" id="network-ovn-network-conf:dns.search">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">dns.search</span></code></span><span class="shortdesc"><p>Full domain search list</p>
</span><span class="anchor"><a class="reference external" href="#network-ovn-network-conf:dns.search"><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></a></span></div>
<div class="details docutils container">
<div class="table-wrapper fields docutils container">
<table class="fields docutils align-default">
<tbody>
<tr class="row-odd"><td><strong>Key: </strong></td>
<td><code class="docutils literal notranslate"><span class="pre">dns.search</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>string</p>
</span></td>
</tr>
<tr class="row-odd"><td><strong>Default: </strong></td>
<td><span class="ignoreP"><p><code class="docutils literal notranslate"><span class="pre">dns.domain</span></code> value</p>
</span></td>
</tr>
</tbody>
</table>
</div>
<p>Specify a comma-separated list of domains.</p>
</div>
</div>
<div class="configoption docutils container" id="network-ovn-network-conf:dns.zone.forward">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">dns.zone.forward</span></code></span><span class="shortdesc"><p>DNS zone names for forward DNS records</p>
</span><span class="anchor"><a class="reference external" href="#network-ovn-network-conf:dns.zone.forward"><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></a></span></div>
<div class="details docutils container">
<div class="table-wrapper fields docutils container">
<table class="fields docutils align-default">
<tbody>
<tr class="row-odd"><td><strong>Key: </strong></td>
<td><code class="docutils literal notranslate"><span class="pre">dns.zone.forward</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>string</p>
</span></td>
</tr>
</tbody>
</table>
</div>
<p>Specify a comma-separated list of DNS zone names.</p>
</div>
</div>
<div class="configoption docutils container" id="network-ovn-network-conf:dns.zone.reverse.ipv4">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">dns.zone.reverse.ipv4</span></code></span><span class="shortdesc"><p>DNS zone name for IPv4 reverse DNS records</p>
</span><span class="anchor"><a class="reference external" href="#network-ovn-network-conf:dns.zone.reverse.ipv4"><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></a></span></div>
<div class="details docutils container">
<div class="table-wrapper fields docutils container">
<table class="fields docutils align-default">
<tbody>
<tr class="row-odd"><td><strong>Key: </strong></td>
<td><code class="docutils literal notranslate"><span class="pre">dns.zone.reverse.ipv4</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>string</p>
</span></td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div class="configoption docutils container" id="network-ovn-network-conf:dns.zone.reverse.ipv6">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">dns.zone.reverse.ipv6</span></code></span><span class="shortdesc"><p>DNS zone name for IPv6 reverse DNS records</p>
</span><span class="anchor"><a class="reference external" href="#network-ovn-network-conf:dns.zone.reverse.ipv6"><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></a></span></div>
<div class="details docutils container">
<div class="table-wrapper fields docutils container">
<table class="fields docutils align-default">
<tbody>
<tr class="row-odd"><td><strong>Key: </strong></td>
<td><code class="docutils literal notranslate"><span class="pre">dns.zone.reverse.ipv6</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>string</p>
</span></td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div class="configoption docutils container" id="network-ovn-network-conf:ipv4.address">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">ipv4.address</span></code></span><span class="shortdesc"><p>IPv4 address for the OVN network</p>
</span><span class="anchor"><a class="reference external" href="#network-ovn-network-conf:ipv4.address"><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></a></span></div>
<div class="details docutils container">
<div class="table-wrapper fields docutils container">
<table class="fields docutils align-default">
<tbody>
<tr class="row-odd"><td><strong>Key: </strong></td>
<td><code class="docutils literal notranslate"><span class="pre">ipv4.address</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>string</p>
</span></td>
</tr>
<tr class="row-odd"><td><strong>Default: </strong></td>
<td><span class="ignoreP"><p>initial value on creation: <code class="docutils literal notranslate"><span class="pre">auto</span></code></p>
</span></td>
</tr>
<tr class="row-even"><td><strong>Condition: </strong></td>
<td><span class="ignoreP"><p>standard mode</p>
</span></td>
</tr>
</tbody>
</table>
</div>
<p>Use CIDR notation.</p>
<p>You can set the option to <code class="docutils literal notranslate"><span class="pre">none</span></code> to turn off IPv4, or to <code class="docutils literal notranslate"><span class="pre">auto</span></code> to generate a new random unused subnet.</p>
</div>
</div>
<div class="configoption docutils container" id="network-ovn-network-conf:ipv4.dhcp">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">ipv4.dhcp</span></code></span><span class="shortdesc"><p>Whether to allocate IPv4 addresses using DHCP</p>
</span><span class="anchor"><a class="reference external" href="#network-ovn-network-conf:ipv4.dhcp"><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></a></span></div>
<div class="details docutils container">
<div class="table-wrapper fields docutils container">
<table class="fields docutils align-default">
<tbody>
<tr class="row-odd"><td><strong>Key: </strong></td>
<td><code class="docutils literal notranslate"><span class="pre">ipv4.dhcp</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>bool</p>
</span></td>
</tr>
<tr class="row-odd"><td><strong>Default: </strong></td>
<td><span class="ignoreP"><p><code class="docutils literal notranslate"><span class="pre">true</span></code></p>
</span></td>
</tr>
<tr class="row-even"><td><strong>Condition: </strong></td>
<td><span class="ignoreP"><p>IPv4 address</p>
</span></td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div class="configoption docutils container" id="network-ovn-network-conf:ipv4.dhcp.ranges">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">ipv4.dhcp.ranges</span></code></span><span class="shortdesc"><p>IPv4 ranges to use for DHCP</p>
</span><span class="anchor"><a class="reference external" href="#network-ovn-network-conf:ipv4.dhcp.ranges"><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></a></span></div>
<div class="details docutils container">
<div class="table-wrapper fields docutils container">
<table class="fields docutils align-default">
<tbody>
<tr class="row-odd"><td><strong>Key: </strong></td>
<td><code class="docutils literal notranslate"><span class="pre">ipv4.dhcp.ranges</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>string</p>
</span></td>
</tr>
<tr class="row-odd"><td><strong>Default: </strong></td>
<td><span class="ignoreP"><p>all addresses</p>
</span></td>
</tr>
<tr class="row-even"><td><strong>Condition: </strong></td>
<td><span class="ignoreP"><p>IPv4 DHCP</p>
</span></td>
</tr>
<tr class="row-odd"><td><strong>Scope: </strong></td>
<td><span class="ignoreP"><p>global</p>
</span></td>
</tr>
</tbody>
</table>
</div>
<p>Specify a comma-separated list of IPv4 ranges in FIRST-LAST format.</p>
</div>
</div>
<div class="configoption docutils container" id="network-ovn-network-conf:ipv4.l3only">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">ipv4.l3only</span></code></span><span class="shortdesc"><p>Whether to enable layer 3 only mode for IPv4</p>
</span><span class="anchor"><a class="reference external" href="#network-ovn-network-conf:ipv4.l3only"><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></a></span></div>
<div class="details docutils container">
<div class="table-wrapper fields docutils container">
<table class="fields docutils align-default">
<tbody>
<tr class="row-odd"><td><strong>Key: </strong></td>
<td><code class="docutils literal notranslate"><span class="pre">ipv4.l3only</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>bool</p>
</span></td>
</tr>
<tr class="row-odd"><td><strong>Default: </strong></td>
<td><span class="ignoreP"><p><code class="docutils literal notranslate"><span class="pre">false</span></code></p>
</span></td>
</tr>
<tr class="row-even"><td><strong>Condition: </strong></td>
<td><span class="ignoreP"><p>IPv4 address</p>
</span></td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div class="configoption docutils container" id="network-ovn-network-conf:ipv4.nat">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">ipv4.nat</span></code></span><span class="shortdesc"><p>Whether to use NAT for IPv4</p>
</span><span class="anchor"><a class="reference external" href="#network-ovn-network-conf:ipv4.nat"><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></a></span></div>
<div class="details docutils container">
<div class="table-wrapper fields docutils container">
<table class="fields docutils align-default">
<tbody>
<tr class="row-odd"><td><strong>Key: </strong></td>
<td><code class="docutils literal notranslate"><span class="pre">ipv4.nat</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>bool</p>
</span></td>
</tr>
<tr class="row-odd"><td><strong>Default: </strong></td>
<td><span class="ignoreP"><p><code class="docutils literal notranslate"><span class="pre">false</span></code> (initial value on creation if <code class="docutils literal notranslate"><span class="pre">ipv4.address</span></code> is set to <code class="docutils literal notranslate"><span class="pre">auto</span></code>: <code class="docutils literal notranslate"><span class="pre">true</span></code>)</p>
</span></td>
</tr>
<tr class="row-even"><td><strong>Condition: </strong></td>
<td><span class="ignoreP"><p>IPv4 address</p>
</span></td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div class="configoption docutils container" id="network-ovn-network-conf:ipv4.nat.address">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">ipv4.nat.address</span></code></span><span class="shortdesc"><p>Source address used for outbound traffic from the network</p>
</span><span class="anchor"><a class="reference external" href="#network-ovn-network-conf:ipv4.nat.address"><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></a></span></div>
<div class="details docutils container">
<div class="table-wrapper fields docutils container">
<table class="fields docutils align-default">
<tbody>
<tr class="row-odd"><td><strong>Key: </strong></td>
<td><code class="docutils literal notranslate"><span class="pre">ipv4.nat.address</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>string</p>
</span></td>
</tr>
<tr class="row-odd"><td><strong>Condition: </strong></td>
<td><span class="ignoreP"><p>IPv4 address; requires uplink <code class="docutils literal notranslate"><span class="pre">ovn.ingress_mode=routed</span></code></p>
</span></td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div class="configoption docutils container" id="network-ovn-network-conf:ipv6.address">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">ipv6.address</span></code></span><span class="shortdesc"><p>IPv6 address for the OVN network</p>
</span><span class="anchor"><a class="reference external" href="#network-ovn-network-conf:ipv6.address"><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></a></span></div>
<div class="details docutils container">
<div class="table-wrapper fields docutils container">
<table class="fields docutils align-default">
<tbody>
<tr class="row-odd"><td><strong>Key: </strong></td>
<td><code class="docutils literal notranslate"><span class="pre">ipv6.address</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>string</p>
</span></td>
</tr>
<tr class="row-odd"><td><strong>Default: </strong></td>
<td><span class="ignoreP"><p>initial value on creation: <code class="docutils literal notranslate"><span class="pre">auto</span></code></p>
</span></td>
</tr>
<tr class="row-even"><td><strong>Condition: </strong></td>
<td><span class="ignoreP"><p>standard mode</p>
</span></td>
</tr>
</tbody>
</table>
</div>
<p>Use CIDR notation.</p>
<p>You can set the option to <code class="docutils literal notranslate"><span class="pre">none</span></code> to turn off IPv6, or to <code class="docutils literal notranslate"><span class="pre">auto</span></code> to generate a new random unused subnet.</p>
</div>
</div>
<div class="configoption docutils container" id="network-ovn-network-conf:ipv6.dhcp">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">ipv6.dhcp</span></code></span><span class="shortdesc"><p>Whether to provide additional network configuration over DHCP</p>
</span><span class="anchor"><a class="reference external" href="#network-ovn-network-conf:ipv6.dhcp"><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></a></span></div>
<div class="details docutils container">
<div class="table-wrapper fields docutils container">
<table class="fields docutils align-default">
<tbody>
<tr class="row-odd"><td><strong>Key: </strong></td>
<td><code class="docutils literal notranslate"><span class="pre">ipv6.dhcp</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>bool</p>
</span></td>
</tr>
<tr class="row-odd"><td><strong>Default: </strong></td>
<td><span class="ignoreP"><p><code class="docutils literal notranslate"><span class="pre">true</span></code></p>
</span></td>
</tr>
<tr class="row-even"><td><strong>Condition: </strong></td>
<td><span class="ignoreP"><p>IPv6 address</p>
</span></td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div class="configoption docutils container" id="network-ovn-network-conf:ipv6.dhcp.stateful">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">ipv6.dhcp.stateful</span></code></span><span class="shortdesc"><p>Whether to allocate IPv6 addresses using DHCP</p>
</span><span class="anchor"><a class="reference external" href="#network-ovn-network-conf:ipv6.dhcp.stateful"><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></a></span></div>
<div class="details docutils container">
<div class="table-wrapper fields docutils container">
<table class="fields docutils align-default">
<tbody>
<tr class="row-odd"><td><strong>Key: </strong></td>
<td><code class="docutils literal notranslate"><span class="pre">ipv6.dhcp.stateful</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>bool</p>
</span></td>
</tr>
<tr class="row-odd"><td><strong>Default: </strong></td>
<td><span class="ignoreP"><p><code class="docutils literal notranslate"><span class="pre">false</span></code></p>
</span></td>
</tr>
<tr class="row-even"><td><strong>Condition: </strong></td>
<td><span class="ignoreP"><p>IPv6 DHCP</p>
</span></td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div class="configoption docutils container" id="network-ovn-network-conf:ipv6.l3only">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">ipv6.l3only</span></code></span><span class="shortdesc"><p>Whether to enable layer 3 only mode for IPv6</p>
</span><span class="anchor"><a class="reference external" href="#network-ovn-network-conf:ipv6.l3only"><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></a></span></div>
<div class="details docutils container">
<div class="table-wrapper fields docutils container">
<table class="fields docutils align-default">
<tbody>
<tr class="row-odd"><td><strong>Key: </strong></td>
<td><code class="docutils literal notranslate"><span class="pre">ipv6.l3only</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>bool</p>
</span></td>
</tr>
<tr class="row-odd"><td><strong>Default: </strong></td>
<td><span class="ignoreP"><p><code class="docutils literal notranslate"><span class="pre">false</span></code></p>
</span></td>
</tr>
<tr class="row-even"><td><strong>Condition: </strong></td>
<td><span class="ignoreP"><p>IPv6 DHCP stateful</p>
</span></td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div class="configoption docutils container" id="network-ovn-network-conf:ipv6.nat">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">ipv6.nat</span></code></span><span class="shortdesc"><p>Whether to use NAT for IPv6</p>
</span><span class="anchor"><a class="reference external" href="#network-ovn-network-conf:ipv6.nat"><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></a></span></div>
<div class="details docutils container">
<div class="table-wrapper fields docutils container">
<table class="fields docutils align-default">
<tbody>
<tr class="row-odd"><td><strong>Key: </strong></td>
<td><code class="docutils literal notranslate"><span class="pre">ipv6.nat</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>bool</p>
</span></td>
</tr>
<tr class="row-odd"><td><strong>Default: </strong></td>
<td><span class="ignoreP"><p><code class="docutils literal notranslate"><span class="pre">false</span></code> (initial value on creation if <code class="docutils literal notranslate"><span class="pre">ipv6.address</span></code> is set to <code class="docutils literal notranslate"><span class="pre">auto</span></code>: <code class="docutils literal notranslate"><span class="pre">true</span></code>)</p>
</span></td>
</tr>
<tr class="row-even"><td><strong>Condition: </strong></td>
<td><span class="ignoreP"><p>IPv6 address</p>
</span></td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div class="configoption docutils container" id="network-ovn-network-conf:ipv6.nat.address">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">ipv6.nat.address</span></code></span><span class="shortdesc"><p>Source address used for outbound traffic from the network</p>
</span><span class="anchor"><a class="reference external" href="#network-ovn-network-conf:ipv6.nat.address"><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></a></span></div>
<div class="details docutils container">
<div class="table-wrapper fields docutils container">
<table class="fields docutils align-default">
<tbody>
<tr class="row-odd"><td><strong>Key: </strong></td>
<td><code class="docutils literal notranslate"><span class="pre">ipv6.nat.address</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>string</p>
</span></td>
</tr>
<tr class="row-odd"><td><strong>Condition: </strong></td>
<td><span class="ignoreP"><p>IPv6 address; requires uplink <code class="docutils literal notranslate"><span class="pre">ovn.ingress_mode=routed</span></code></p>
</span></td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div class="configoption docutils container" id="network-ovn-network-conf:network">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">network</span></code></span><span class="shortdesc"><p>Uplink network to use for external network access</p>
</span><span class="anchor"><a class="reference external" href="#network-ovn-network-conf:network"><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></a></span></div>
<div class="details docutils container">
<div class="table-wrapper fields docutils container">
<table class="fields docutils align-default">
<tbody>
<tr class="row-odd"><td><strong>Key: </strong></td>
<td><code class="docutils literal notranslate"><span class="pre">network</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>string</p>
</span></td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div class="configoption docutils container" id="network-ovn-network-conf:security.acls">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">security.acls</span></code></span><span class="shortdesc"><p>Network ACLs to apply to NICs connected to this network</p>
</span><span class="anchor"><a class="reference external" href="#network-ovn-network-conf:security.acls"><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></a></span></div>
<div class="details docutils container">
<div class="table-wrapper fields docutils container">
<table class="fields docutils align-default">
<tbody>
<tr class="row-odd"><td><strong>Key: </strong></td>
<td><code class="docutils literal notranslate"><span class="pre">security.acls</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>string</p>
</span></td>
</tr>
</tbody>
</table>
</div>
<p>Specify a comma-separated list of network ACLs.</p>
</div>
</div>
<div class="configoption docutils container" id="network-ovn-network-conf:security.acls.default.egress.action">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">security.acls.default.egress.action</span></code></span><span class="shortdesc"><p>Default action to use for egress traffic</p>
</span><span class="anchor"><a class="reference external" href="#network-ovn-network-conf:security.acls.default.egress.action"><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></a></span></div>
<div class="details docutils container">
<div class="table-wrapper fields docutils container">
<table class="fields docutils align-default">
<tbody>
<tr class="row-odd"><td><strong>Key: </strong></td>
<td><code class="docutils literal notranslate"><span class="pre">security.acls.default.egress.action</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>string</p>
</span></td>
</tr>
<tr class="row-odd"><td><strong>Default: </strong></td>
<td><span class="ignoreP"><p><code class="docutils literal notranslate"><span class="pre">reject</span></code></p>
</span></td>
</tr>
<tr class="row-even"><td><strong>Condition: </strong></td>
<td><span class="ignoreP"><p><code class="docutils literal notranslate"><span class="pre">security.acls</span></code></p>
</span></td>
</tr>
</tbody>
</table>
</div>
<p>The specified action is used for all egress traffic that doesn’t match any ACL rule.</p>
</div>
</div>
<div class="configoption docutils container" id="network-ovn-network-conf:security.acls.default.egress.logged">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">security.acls.default.egress.logged</span></code></span><span class="shortdesc"><p>Whether to log egress traffic that doesn’t match any ACL rule</p>
</span><span class="anchor"><a class="reference external" href="#network-ovn-network-conf:security.acls.default.egress.logged"><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></a></span></div>
<div class="details docutils container">
<div class="table-wrapper fields docutils container">
<table class="fields docutils align-default">
<tbody>
<tr class="row-odd"><td><strong>Key: </strong></td>
<td><code class="docutils literal notranslate"><span class="pre">security.acls.default.egress.logged</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>bool</p>
</span></td>
</tr>
<tr class="row-odd"><td><strong>Default: </strong></td>
<td><span class="ignoreP"><p><code class="docutils literal notranslate"><span class="pre">false</span></code></p>
</span></td>
</tr>
<tr class="row-even"><td><strong>Condition: </strong></td>
<td><span class="ignoreP"><p><code class="docutils literal notranslate"><span class="pre">security.acls</span></code></p>
</span></td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div class="configoption docutils container" id="network-ovn-network-conf:security.acls.default.ingress.action">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">security.acls.default.ingress.action</span></code></span><span class="shortdesc"><p>Default action to use for ingress traffic</p>
</span><span class="anchor"><a class="reference external" href="#network-ovn-network-conf:security.acls.default.ingress.action"><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></a></span></div>
<div class="details docutils container">
<div class="table-wrapper fields docutils container">
<table class="fields docutils align-default">
<tbody>
<tr class="row-odd"><td><strong>Key: </strong></td>
<td><code class="docutils literal notranslate"><span class="pre">security.acls.default.ingress.action</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>string</p>
</span></td>
</tr>
<tr class="row-odd"><td><strong>Default: </strong></td>
<td><span class="ignoreP"><p><code class="docutils literal notranslate"><span class="pre">reject</span></code></p>
</span></td>
</tr>
<tr class="row-even"><td><strong>Condition: </strong></td>
<td><span class="ignoreP"><p><code class="docutils literal notranslate"><span class="pre">security.acls</span></code></p>
</span></td>
</tr>
</tbody>
</table>
</div>
<p>The specified action is used for all ingress traffic that doesn’t match any ACL rule.</p>
</div>
</div>
<div class="configoption docutils container" id="network-ovn-network-conf:security.acls.default.ingress.logged">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">security.acls.default.ingress.logged</span></code></span><span class="shortdesc"><p>Whether to log ingress traffic that doesn’t match any ACL rule</p>
</span><span class="anchor"><a class="reference external" href="#network-ovn-network-conf:security.acls.default.ingress.logged"><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></a></span></div>
<div class="details docutils container">
<div class="table-wrapper fields docutils container">
<table class="fields docutils align-default">
<tbody>
<tr class="row-odd"><td><strong>Key: </strong></td>
<td><code class="docutils literal notranslate"><span class="pre">security.acls.default.ingress.logged</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>bool</p>
</span></td>
</tr>
<tr class="row-odd"><td><strong>Default: </strong></td>
<td><span class="ignoreP"><p><code class="docutils literal notranslate"><span class="pre">false</span></code></p>
</span></td>
</tr>
<tr class="row-even"><td><strong>Condition: </strong></td>
<td><span class="ignoreP"><p><code class="docutils literal notranslate"><span class="pre">security.acls</span></code></p>
</span></td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div class="configoption docutils container" id="network-ovn-network-conf:user.*">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">user.*</span></code></span><span class="shortdesc"><p>User-provided free-form key/value pairs</p>
</span><span class="anchor"><a class="reference external" href="#network-ovn-network-conf:user.*"><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></a></span></div>
<div class="details docutils container">
<div class="table-wrapper fields docutils container">
<table class="fields docutils align-default">
<tbody>
<tr class="row-odd"><td><strong>Key: </strong></td>
<td><code class="docutils literal notranslate"><span class="pre">user.*</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>string</p>
</span></td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
</section>
<section id="supported-features">
<span id="network-ovn-features"></span><h2>Supported features<a class="headerlink" href="#supported-features" title="Link to this heading">¶</a></h2>
<p>The following features are supported for the <code class="docutils literal notranslate"><span class="pre">ovn</span></code> network type:</p>
<ul class="simple">
<li><p><a class="reference internal" href="../../howto/network_acls/#network-acls"><span class="std std-ref">How to configure network ACLs</span></a></p></li>
<li><p><a class="reference internal" href="../../howto/network_forwards/#network-forwards"><span class="std std-ref">How to configure network forwards</span></a></p></li>
<li><p><a class="reference internal" href="../../howto/network_zones/#network-zones"><span class="std std-ref">How to configure network zones</span></a></p></li>
<li><p><a class="reference internal" href="../../howto/network_ovn_peers/#network-ovn-peers"><span class="std std-ref">How to create OVN peer routing relationships</span></a></p></li>
<li><p><a class="reference internal" href="../../howto/network_load_balancers/#network-load-balancers"><span class="std std-ref">How to configure network load balancers</span></a></p></li>
</ul>
</section>
</section>

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