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        <article role="main" id="furo-main-content">
          <section id="how-to-configure-network-load-balancers">
<span id="network-load-balancers"></span><h1>How to configure network load balancers<a class="headerlink" href="#how-to-configure-network-load-balancers" title="Link to this heading">¶</a></h1>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>Network load balancers are currently available for the <a class="reference internal" href="../../reference/network_ovn/#network-ovn"><span class="std std-ref">OVN network</span></a>.</p>
</div>
<p>Network load balancers are similar to forwards in that they allow specific ports on an IP address (external or internal) to be forwarded to specific ports on internal IP addresses in the same network as the load balancer.</p>
<p>The difference between load balancers and forwards is that load balancers can be used to share ingress traffic between multiple internal backend addresses. This feature can be useful if you have limited external IP addresses or want to share a single external address and ports over multiple instances.</p>
<p>A load balancer is made up of:</p>
<ul class="simple">
<li><p>A single listen IP address (external or internal).</p></li>
<li><p>One or more named backends consisting of an internal IP and optional port ranges.</p></li>
<li><p>One or more listen port ranges that are configured to forward to one or more named backends.</p></li>
</ul>
<section id="create-a-network-load-balancer">
<h2>Create a network load balancer<a class="headerlink" href="#create-a-network-load-balancer" title="Link to this heading">¶</a></h2>
<p>Use the following command to create a network load balancer:</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>lxc<span class="w"> </span>network<span class="w"> </span>load-balancer<span class="w"> </span>create<span class="w"> </span>&lt;network_name&gt;<span class="w"> </span><span class="o">[</span>&lt;listen_address&gt;<span class="o">]</span><span class="w"> </span><span class="o">[</span>--allocate<span class="o">=</span>ipv<span class="o">{</span><span class="m">4</span>,6<span class="o">}]</span><span class="w"> </span><span class="o">[</span>configuration_options...<span class="o">]</span>
</pre></div>
</div>
<p>Example with a specified listen address:</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>lxc<span class="w"> </span>network<span class="w"> </span>load-balancer<span class="w"> </span>create<span class="w"> </span>my-ovn-network<span class="w"> </span><span class="m">192</span>.0.2.178
</pre></div>
</div>
<p>Example with an allocated listen address:</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>lxc<span class="w"> </span>network<span class="w"> </span>load-balancer<span class="w"> </span>create<span class="w"> </span>my-ovn-network<span class="w"> </span>--allocate<span class="o">=</span>ipv4
</pre></div>
</div>
<p>Each load balancer is assigned to a network.</p>
<p>Listen addresses are subject to restrictions. If a listen address is not specified, the <code class="docutils literal notranslate"><span class="pre">--allocate</span></code> flag must be provided. See <a class="reference internal" href="#network-load-balancers-listen-addresses"><span class="std std-ref">Requirements for listen addresses</span></a> for more information about which addresses can be load-balanced, as well as how to use the <code class="docutils literal notranslate"><span class="pre">--allocate</span></code> flag.</p>
<section id="load-balancer-properties">
<h3>Load balancer properties<a class="headerlink" href="#load-balancer-properties" title="Link to this heading">¶</a></h3>
<p>Network load balancers have the following properties:</p>
<div class="configoption docutils container" id="network-load-balancer-load-balancer-properties:backends">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">backends</span></code></span><span class="shortdesc"><p>List of backend specifications</p>
</span><span class="anchor"><a class="reference external" href="#network-load-balancer-load-balancer-properties:backends"><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">backends</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>backend list</p>
</span></td>
</tr>
<tr class="row-odd"><td><strong>Required: </strong></td>
<td><span class="ignoreP"><p>no</p>
</span></td>
</tr>
</tbody>
</table>
</div>
<p>See <a class="reference internal" href="#network-load-balancers-backend-specifications"><span class="std std-ref">Configure backends</span></a>.</p>
</div>
</div>
<div class="configoption docutils container" id="network-load-balancer-load-balancer-properties:config">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">config</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-load-balancer-load-balancer-properties:config"><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">config</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>string set</p>
</span></td>
</tr>
<tr class="row-odd"><td><strong>Required: </strong></td>
<td><span class="ignoreP"><p>no</p>
</span></td>
</tr>
</tbody>
</table>
</div>
<p>The only supported keys are <code class="docutils literal notranslate"><span class="pre">user.*</span></code> custom keys.</p>
</div>
</div>
<div class="configoption docutils container" id="network-load-balancer-load-balancer-properties:description">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">description</span></code></span><span class="shortdesc"><p>Description of the network load balancer</p>
</span><span class="anchor"><a class="reference external" href="#network-load-balancer-load-balancer-properties:description"><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">description</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>Required: </strong></td>
<td><span class="ignoreP"><p>no</p>
</span></td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div class="configoption docutils container" id="network-load-balancer-load-balancer-properties:listen_address">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">listen_address</span></code></span><span class="shortdesc"><p>IP address to listen on</p>
</span><span class="anchor"><a class="reference external" href="#network-load-balancer-load-balancer-properties:listen_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">listen_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>Required: </strong></td>
<td><span class="ignoreP"><p>no</p>
</span></td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div class="configoption docutils container" id="network-load-balancer-load-balancer-properties:ports">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">ports</span></code></span><span class="shortdesc"><p>List of port specifications</p>
</span><span class="anchor"><a class="reference external" href="#network-load-balancer-load-balancer-properties:ports"><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">ports</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>port list</p>
</span></td>
</tr>
<tr class="row-odd"><td><strong>Required: </strong></td>
<td><span class="ignoreP"><p>no</p>
</span></td>
</tr>
</tbody>
</table>
</div>
<p>See <a class="reference internal" href="#network-load-balancers-port-specifications"><span class="std std-ref">Configure ports</span></a>.</p>
</div>
</div>
</section>
<section id="requirements-for-listen-addresses">
<span id="network-load-balancers-listen-addresses"></span><h3>Requirements for listen addresses<a class="headerlink" href="#requirements-for-listen-addresses" title="Link to this heading">¶</a></h3>
<p>The following requirements must be met for valid listen addresses:</p>
<p>For external listen IP addresses:</p>
<ul class="simple">
<li><p>Allowed listen addresses must be defined in the uplink network’s <code class="docutils literal notranslate"><span class="pre">ipv{n}.routes</span></code> settings or the project’s <a class="configref reference internal" href="../../reference/projects/#project-restricted:restricted.networks.subnets"><code class="docutils literal notranslate"><span class="pre">restricted.networks.subnets</span></code></a> setting.</p>
<ul>
<li><p>If you specify a listen address when creating a load balancer, it must be within the range of allowed addresses.</p></li>
<li><p>If you do not specify a listen address, you must use either <code class="docutils literal notranslate"><span class="pre">--allocate</span> <span class="pre">ipv4</span></code> or <code class="docutils literal notranslate"><span class="pre">--allocate</span> <span class="pre">ipv6</span></code>. This will allocate a listen address from the range of allowed addresses.</p></li>
</ul>
</li>
<li><p>The listen address must not overlap with a subnet that is in use with another network or entity in that network.</p></li>
</ul>
<p>For internal listen IP addresses:</p>
<ul class="simple">
<li><p>Allowed listen addresses must not be used by the associated network’s gateway, other existing load balancers and network forwards, or instance NICs.</p></li>
</ul>
</section>
</section>
<section id="configure-backends">
<span id="network-load-balancers-backend-specifications"></span><h2>Configure backends<a class="headerlink" href="#configure-backends" title="Link to this heading">¶</a></h2>
<p>You can add backend specifications to the network load balancer to define target addresses (and optionally ports).
The backend target address must be within the same subnet as the network associated with the load balancer.</p>
<p>Use the following command to add a backend specification:</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>lxc<span class="w"> </span>network<span class="w"> </span>load-balancer<span class="w"> </span>backend<span class="w"> </span>add<span class="w"> </span>&lt;network_name&gt;<span class="w"> </span>&lt;listen_address&gt;<span class="w"> </span>&lt;backend_name&gt;<span class="w"> </span>&lt;target_address&gt;<span class="w"> </span><span class="o">[</span>&lt;target_ports&gt;<span class="o">]</span>
</pre></div>
</div>
<p>Example:</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>lxc<span class="w"> </span>network<span class="w"> </span>load-balancer<span class="w"> </span>backend<span class="w"> </span>add<span class="w"> </span>my-ovn-network<span class="w"> </span><span class="m">192</span>.0.2.178<span class="w"> </span>test-backend<span class="w"> </span><span class="m">10</span>.41.211.5
</pre></div>
</div>
<p>If no target ports are specified when adding the backend:</p>
<ul class="simple">
<li><p>The load balancer uses the listen ports defined in the <a class="reference internal" href="#port-properties">port specification</a> associated with that backend, if any.</p></li>
<li><p>If no such listen ports are defined, the backend has no target ports and is inactive. You must either <a class="reference internal" href="#port-properties">add a port specification</a> or <a class="reference internal" href="#edit-a-network-load-balancer">edit the load balancer configuration</a> to include a <code class="docutils literal notranslate"><span class="pre">target_port</span></code> value in the backend specification or a <code class="docutils literal notranslate"><span class="pre">listen_port</span></code> value in the ports specification.</p></li>
</ul>
<p>If you want to forward the traffic to different ports, you have two options:</p>
<ul class="simple">
<li><p>Specify a single target port to forward traffic from all listen ports to this target port.</p></li>
<li><p>Specify a set of target ports with the same number of ports as the listen ports to forward traffic from the first listen port to the first target port, the second listen port to the second target port, and so on.</p></li>
</ul>
<section id="backend-properties">
<h3>Backend properties<a class="headerlink" href="#backend-properties" title="Link to this heading">¶</a></h3>
<p>Network load balancer backends have the following properties:</p>
<div class="configoption docutils container" id="network-load-balancer-load-balancer-backend-properties:description">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">description</span></code></span><span class="shortdesc"><p>Description of the backend</p>
</span><span class="anchor"><a class="reference external" href="#network-load-balancer-load-balancer-backend-properties:description"><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">description</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>Required: </strong></td>
<td><span class="ignoreP"><p>no</p>
</span></td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div class="configoption docutils container" id="network-load-balancer-load-balancer-backend-properties:name">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">name</span></code></span><span class="shortdesc"><p>Name of the backend</p>
</span><span class="anchor"><a class="reference external" href="#network-load-balancer-load-balancer-backend-properties:name"><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">name</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>Required: </strong></td>
<td><span class="ignoreP"><p>yes</p>
</span></td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div class="configoption docutils container" id="network-load-balancer-load-balancer-backend-properties:target_address">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">target_address</span></code></span><span class="shortdesc"><p>IP address to forward to</p>
</span><span class="anchor"><a class="reference external" href="#network-load-balancer-load-balancer-backend-properties:target_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">target_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>Required: </strong></td>
<td><span class="ignoreP"><p>yes</p>
</span></td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div class="configoption docutils container" id="network-load-balancer-load-balancer-backend-properties:target_port">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">target_port</span></code></span><span class="shortdesc"><p>Target port or ports</p>
</span><span class="anchor"><a class="reference external" href="#network-load-balancer-load-balancer-backend-properties:target_port"><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">target_port</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>same as <a class="configref reference internal" href="#network-load-balancer-load-balancer-port-properties:listen_port"><code class="docutils literal notranslate"><span class="pre">listen_port</span></code></a></p>
</span></td>
</tr>
<tr class="row-even"><td><strong>Required: </strong></td>
<td><span class="ignoreP"><p>no</p>
</span></td>
</tr>
</tbody>
</table>
</div>
<p>For example: <code class="docutils literal notranslate"><span class="pre">70,80-90</span></code> or <code class="docutils literal notranslate"><span class="pre">90</span></code></p>
</div>
</div>
</section>
</section>
<section id="configure-ports">
<span id="network-load-balancers-port-specifications"></span><h2>Configure ports<a class="headerlink" href="#configure-ports" title="Link to this heading">¶</a></h2>
<p>You can add port specifications to the network load balancer to forward traffic from specific ports on the listen address to specific ports on one or more target backends.</p>
<p>Use the following command to add a port specification:</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>lxc<span class="w"> </span>network<span class="w"> </span>load-balancer<span class="w"> </span>port<span class="w"> </span>add<span class="w"> </span>&lt;network_name&gt;<span class="w"> </span>&lt;listen_address&gt;<span class="w"> </span>&lt;protocol&gt;<span class="w"> </span>&lt;listen_ports&gt;<span class="w"> </span>&lt;backend_name&gt;<span class="o">[</span>,&lt;backend_name&gt;...<span class="o">]</span>
</pre></div>
</div>
<p>Example:</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>lxc<span class="w"> </span>network<span class="w"> </span>load-balancer<span class="w"> </span>port<span class="w"> </span>add<span class="w"> </span>my-ovn-network<span class="w"> </span><span class="m">192</span>.0.2.178<span class="w"> </span>tcp<span class="w"> </span><span class="m">80</span><span class="w"> </span>test-backend
</pre></div>
</div>
<p>You can specify a single listen port or a set of ports.
The backend(s) specified must have target port(s) settings compatible with the port’s listen port(s) setting.</p>
<section id="port-properties">
<h3>Port properties<a class="headerlink" href="#port-properties" title="Link to this heading">¶</a></h3>
<p>Network load balancer ports have the following properties:</p>
<div class="configoption docutils container" id="network-load-balancer-load-balancer-port-properties:description">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">description</span></code></span><span class="shortdesc"><p>Description of the port or ports</p>
</span><span class="anchor"><a class="reference external" href="#network-load-balancer-load-balancer-port-properties:description"><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">description</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>Required: </strong></td>
<td><span class="ignoreP"><p>no</p>
</span></td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div class="configoption docutils container" id="network-load-balancer-load-balancer-port-properties:listen_port">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">listen_port</span></code></span><span class="shortdesc"><p>Listen port or ports</p>
</span><span class="anchor"><a class="reference external" href="#network-load-balancer-load-balancer-port-properties:listen_port"><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">listen_port</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>Required: </strong></td>
<td><span class="ignoreP"><p>yes</p>
</span></td>
</tr>
</tbody>
</table>
</div>
<p>For example: <code class="docutils literal notranslate"><span class="pre">80,90-100</span></code></p>
</div>
</div>
<div class="configoption docutils container" id="network-load-balancer-load-balancer-port-properties:protocol">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">protocol</span></code></span><span class="shortdesc"><p>Protocol for the port or ports</p>
</span><span class="anchor"><a class="reference external" href="#network-load-balancer-load-balancer-port-properties:protocol"><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">protocol</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>Required: </strong></td>
<td><span class="ignoreP"><p>yes</p>
</span></td>
</tr>
</tbody>
</table>
</div>
<p>Possible values are <code class="docutils literal notranslate"><span class="pre">tcp</span></code> and <code class="docutils literal notranslate"><span class="pre">udp</span></code>.</p>
</div>
</div>
<div class="configoption docutils container" id="network-load-balancer-load-balancer-port-properties:target_backend">
<div class="basicinfo docutils container">
<span class="key"><code class="docutils literal notranslate"><span class="pre">target_backend</span></code></span><span class="shortdesc"><p>Backend name or names to forward to</p>
</span><span class="anchor"><a class="reference external" href="#network-load-balancer-load-balancer-port-properties:target_backend"><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">target_backend</span></code></td>
</tr>
<tr class="row-even"><td><strong>Type: </strong></td>
<td><span class="ignoreP"><p>backend list</p>
</span></td>
</tr>
<tr class="row-odd"><td><strong>Required: </strong></td>
<td><span class="ignoreP"><p>yes</p>
</span></td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
</section>
</section>
<section id="edit-a-network-load-balancer">
<h2>Edit a network load balancer<a class="headerlink" href="#edit-a-network-load-balancer" title="Link to this heading">¶</a></h2>
<p>Use the following command to edit a network load balancer:</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>lxc<span class="w"> </span>network<span class="w"> </span>load-balancer<span class="w"> </span>edit<span class="w"> </span>&lt;network_name&gt;<span class="w"> </span>&lt;listen_address&gt;
</pre></div>
</div>
<p>This command opens the network load balancer in YAML format for editing.
You can edit the general configuration, as well as the backend and port specifications.</p>
<p>Example load balancer configuration YAML file:</p>
<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">listen_address</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">192.0.2.178</span>
<span class="nt">location</span><span class="p">:</span><span class="w"> </span><span class="s">&quot;&quot;</span>
<span class="nt">description</span><span class="p">:</span><span class="w"> </span><span class="s">&quot;&quot;</span>
<span class="nt">config</span><span class="p">:</span><span class="w"> </span><span class="p p-Indicator">{}</span>
<span class="nt">backends</span><span class="p">:</span>
<span class="p p-Indicator">-</span><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">test-backend</span>
<span class="w">  </span><span class="nt">description</span><span class="p">:</span><span class="w"> </span><span class="s">&quot;&quot;</span>
<span class="w">  </span><span class="nt">target_port</span><span class="p">:</span><span class="w"> </span><span class="s">&quot;&quot;</span>
<span class="w">  </span><span class="nt">target_address</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">10.41.211.5</span>
<span class="nt">ports</span><span class="p">:</span>
<span class="p p-Indicator">-</span><span class="w"> </span><span class="nt">description</span><span class="p">:</span><span class="w"> </span><span class="s">&quot;&quot;</span>
<span class="w">  </span><span class="nt">protocol</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">tcp</span>
<span class="w">  </span><span class="nt">listen_port</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">70,80-90</span>
<span class="w">  </span><span class="nt">target_backend</span><span class="p">:</span>
<span class="w">  </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">test-backend</span>
</pre></div>
</div>
</section>
<section id="delete-a-network-load-balancer">
<h2>Delete a network load balancer<a class="headerlink" href="#delete-a-network-load-balancer" title="Link to this heading">¶</a></h2>
<p>Use the following command to delete a network load balancer:</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>lxc<span class="w"> </span>network<span class="w"> </span>load-balancer<span class="w"> </span>delete<span class="w"> </span>&lt;network_name&gt;<span class="w"> </span>&lt;listen_address&gt;
</pre></div>
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<li><a class="reference internal" href="#">How to configure network load balancers</a><ul>
<li><a class="reference internal" href="#create-a-network-load-balancer">Create a network load balancer</a><ul>
<li><a class="reference internal" href="#load-balancer-properties">Load balancer properties</a></li>
<li><a class="reference internal" href="#requirements-for-listen-addresses">Requirements for listen addresses</a></li>
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<li><a class="reference internal" href="#port-properties">Port properties</a></li>
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<li><a class="reference internal" href="#edit-a-network-load-balancer">Edit a network load balancer</a></li>
<li><a class="reference internal" href="#delete-a-network-load-balancer">Delete a network load balancer</a></li>
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