I see Bill beat me to it, but since I had this typed, I'll post anyway
🙂
The default MTU is 1500. The
configure jumbo-frame-size
command is used to change it, once enabled.
The value can be seen in
show port info detail output.
That "Jumbo" line will look like this when enabled (or if otherwise configured):
Jumbo: Enabled, MTU= 9216There's likely another location to see this configuration, but it's not coming to me right now and I couldn't find it right away.