With this option can we imagine to setup a vxlan over the internet with a higher MTU ? Would it ref-fragment it when it comes?
Haven’t specifically tested it. But my thought be you’d only use don’t fragment if you knew for sure you had a higher MTU available over the entire path & wanted it to fail if not.
If your WAN is 1500, VXLAN has to be 1450 (or lower if full path is lower) if you want to use dont-fragment.