Now, I know this, and everyone on the list knows this, because we've been using the AF24 for years. We know we can use it with either 1600 or 9000 byte MTU.
But I find it amazing that there is no mention anywhere of max MTU (or MTU settings/capabilities in general) anywhere whatsoever in the ubnt AF24 users manual: https://dl.ubnt.com/guides/airfiber/airFiber_AF24_UG.pdf ctrl-f for "mtu"... nothing. People should not be required to google "af24 mtu 9000" and trawl through forum posts from non-ubnt-employee third parties on the ubnt forum to know if a PTP bridge product is going to work for a particular application or not. Same goes for the AF11FX and AF24HD.