t: reviews
  subsets:
  - name: v1
    labels:
      version: v1
    trafficPolicy:
      connectionPool:
        tcp:
          maxConnections: 100
</code></pre><p>Even if Istio&rsquo;s default round-robin routing calls &ldquo;v1&rdquo; instances on occasion,
maybe even always if &ldquo;v1&rdquo; is the only running version, the above traffic policy will never be invoked.</p><p>You can fix the above example in one of two ways:</p><ol><li><p>Move the traffic policy in the destination rule up a level to make