f you are not using per-port-level PeerAuthentication on pass through filter chains.</p><h2 id=service-tags-added-to-trace-spans>Service Tags added to trace spans</h2><p>Istio now configures Envoy to include tags identifying the canonical service for a workload in generated trace spans.</p><p>This will lead to a small increase in storage per span for tracing backends.</p><p>To disable these additional tags, modify the &lsquo;istiod&rsquo; deployment to set an environment variable of <code>PILOT_ENABLE_ISTIO