ria-hidden=true><h2>Links</h2><ol id=endnotes></ol></div></div><div class=toc-container><nav class=toc aria-label="Table of Contents"><div id=toc><ol><li role=none aria-label="Upgrade prerequisites"><a href=#upgrade-prerequisites>Upgrade prerequisites</a><li role=none aria-label="Upgrade steps"><a href=#upgrade-steps>Upgrade steps</a><li role=none aria-label="Downgrade prerequisites"><a href=#downgrade-prerequisites>Downgrade prerequisites</a><li role=none aria-label="Steps to downgrade to a lower Istio ver