o 1.1.x to 1.2.x. Here, we detail cases where we intentionally broke backwards
compatibility. We also mention cases where backwards compatibility was
preserved but new behavior was introduced that would be surprising to someone
familiar with the use and operation of Istio 1.1.</p><h2 id=installation-and-upgrade>Installation and upgrade</h2><div><aside class="callout tip"><div class=type><svg class="large-icon"><use xlink:href="/v1.4/img/icons.svg#callout-tip"/></svg></div><div class=content>The configuratio