Oh, yeah, don't get me started... It is SO damn freaking annoyinggly hard to set up a common packet size for all my devices! Completely ridiculous! For example, I have NAS-to-Switch 10G fiber that supports > 9000, switch-to-clients 10G fiber and 1G copper, and every damn machine has different NIC with not only different frame caps (some 4K, some 8K, some 9K, others unknown), but they represent different numbers!! For example, Intel vs Mellanox accept byte numbers with and without headers (don't remember which is which) - try guessing! That's in Windows, of course. Where vendors design their UIs/configs.