><p>Create three namespaces:</p><ul><li><code>dual-stack</code>: <code>tcp-echo</code> will listen on both an IPv4 and IPv6 address.</li><li><code>ipv4</code>: <code>tcp-echo</code> will listen on only an IPv4 address.</li><li><code>ipv6</code>: <code>tcp-echo</code> will listen on only an IPv6 address.</li></ul><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ kubectl create namespace dual-stack
$ kubectl create namespace ipv4
$ kubectl create namespace ipv6
</code></pre></li><li><p>En