sion of the <code>tcp-echo</code> service, while 20% was
routed to <code>v2</code>.</p></li></ol><h2 id=understanding-what-happened>Understanding what happened</h2><p>In this task you partially migrated TCP traffic from an old to new version of
the <code>tcp-echo</code> service using Istio&rsquo;s weighted routing feature. Note that this is
very different than doing version migration using the deployment features of
container orchestration platforms, which use instance scaling to manage the
traffic.</p><p>W