u are specifying config in its
entirety, use <code>REPLACE</code> instead.</p>

</td>
</tr>
<tr id="EnvoyFilter-Patch-Operation-ADD">
<td><code><a href="#EnvoyFilter-Patch-Operation-ADD">ADD</a></code></td>
<td>
<p>Add the provided config to an existing list (of listeners,
clusters, virtual hosts, network filters, or http
filters). This operation will be ignored when <code>applyTo</code> is set
to <code>ROUTE_CONFIGURATION</code>, or <code>HTTP_ROUTE</code>.</p>

</td>
</tr>
<tr id="EnvoyFilter-Patch-Operat