Is there a utility or linux built in to get the PMTU/MTU of a remote system quickly (sub 1 second preferably)? If so what is it and what syntax does it require?
Google searches have not been my friend today and the only solution I've found is a full blown traceroute which can take upwards of 30 seconds.
tracepath
, but I doubt you are going to get sub-1s discovery with anything.