How to get maximum supported MTU size for interface?

Published: 14/11/2019
How to get maximum supported MTU size for interface?
Source: UNIX.STACKEXCHANGE.COM

I'm trying to find a way to check if nic supporting a specific MTU size or not without trying to set it first (actually, I want to find the theoretical maximum MTU on all interfaces on all my servers). I've inspected all features of ethtool, looked in /sys/class/net, etc, but all I can find is the current MTU value. Are there a way to see how high MTU can be on interface without trying it?

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