<li><p>Route all the traffic destined to the <em>reviews</em> service to its <em>v3</em> version. You do this to ensure that the
<em>reviews</em> service always calls the <em>ratings</em> service. In addition, route all the traffic destined to the <em>ratings</em>
service to <em>ratings v2-mysql</em> that uses your database.</p><p>Specify the routing for both services above by adding two
<a href=/v1.3/docs/reference/config/networking/v1alpha3/virtual-service/>virtual services</a>. These virtual services are