page</code>
to view the Bookinfo web page. If you refresh the page several times, you should
see different versions of reviews shown in <code>productpage</code>, presented in a round robin style (red
stars, black stars, no stars), since we haven&rsquo;t yet used Istio to control the
version routing.</p><h2 id=apply-default-destination-rules>Apply default destination rules</h2><p>Before you can use Istio to control the Bookinfo version routing, you need to define the available
versions, called <em>subsets</e