-what-happened>Understanding what happened</h2><p>The <code>Gateway</code> configuration resources allow external traffic to enter the
Istio service mesh and make the traffic management and policy features of Istio
available for edge services.</p><p>In the preceding steps, you created a service inside the service mesh
and exposed an HTTP endpoint of the service to external traffic.</p><h2 id=troubleshooting>Troubleshooting</h2><ol><li><p>Inspect the values of the <code>INGRESS_HOST</code> and <code>INGRESS_