/pre><p>A few things to note here:</p><ul><li>When traffic gets mirrored to a different service, that happens outside the critical path of the request</li><li>Responses to any mirrored traffic is ignored; traffic is mirrored as &ldquo;fire-and-forget&rdquo;</li><li>You&rsquo;ll need to have the 0-weighted route to hint to Istio to create the proper Envoy cluster under the covers; <a href=https://github.com/istio/istio/issues/3270>this should be ironed out in future releases</a>.</li></ul><p>Learn more about