a></li><li role=none><a role=treeitem title="Install an Istio mesh across multiple Kubernetes clusters with a shared control plane." href=/v1.5/docs/setup/install/multicluster/shared/>Shared control plane (single and multiple networks)</a></li></ul></li></ul></li><li role=treeitem aria-label=Upgrade><button aria-hidden=true></button><a title="Choose the upgrade guide that corresponds to the approach you previously used to install Istio." href=/v1.5/docs/setup/upgrade/>Upgrade</a><ul role=group aria-expanded