/li><li role=none><a role=treeitem title="Describes tools and techniques to diagnose issues using Istio with the CNI plugin." href=/v1.21/docs/ops/diagnostic-tools/cni/>Troubleshooting the Istio CNI plugin</a></li></ul></li><li role=treeitem aria-label="Ambient Mode"><button aria-hidden=true tabindex=-1></button><a title="Information for setting up and operating Istio in ambient mode." href=/v1.21/docs/ops/ambient/>Ambient Mode</a><ul role=group aria-expanded=false><li role=none><a role=treeitem title="How 