f=/v1.12/docs/setup/additional-setup/gateway/>Installing Gateways</a> documentation, which covers best practices for installation, management, and upgrade of gateways.</p><h2 id=updates-to-revision-and-tag-deployments>Updates to revision and tag deployments</h2><p>In Istio 1.6 we added support for running multiple control planes simultaneously, which allows you to do a <a href=/v1.12/blog/2020/multiple-control-planes/>canary deployment of a new Istio version</a>. In 1.10, we introduced <a href=/v1.12/blog/2