rue data-repo=istio>$ export ISTIOCTL_XDS_ADDRESS=localhost:9090
$ export ISTIOCTL_ISTIONAMESPACE=external-istiod
$ export ISTIOCTL_PREFER_EXPERIMENTAL=true
</code></pre><p>Because our control plane is running in the <code>external-istiod</code> namespace, instead of the default <code>istio-system</code>, we also
need to set the <code>ISTIOCTL_ISTIONAMESPACE</code> environment variable.</p><p>Setting <code>ISTIOCTL_PREFER_EXPERIMENTAL</code> is optional. It instructs <code>istioctl</code> to redirect <code>