hi, I recently bought the Chateau LTE12 router and was testing it with my 4G connection, and I can say it works beautifully.

When I connect it to my internet provider, I noticed this notification message appear on the Log screen:

lte1 mbim: network advertises higher mtu: 1550

I wanted to know how I could optimize this parameter and if any modification would really make sense to improve performance,

Thanks

What does field "Actual MTU" shows for lte1 interface? What would happen if you set MTU to 1550 for lte1?

on the WinBox gui it shows 1500, and if I try to manually set it up to 1550 and I click
on Apply it show a RouterOS WinBox Error dialog box saying "Couldn't change Interface <lte 1> - could not set mtu (6)",
then the connection go immediately down and the router re-connect again, but with the same 1500 mtu value.

The same if I try to launch '/interface lte set lte1 mtu=1550' from the Terminal, it
give a "failure: could not set mtu", then again the connection go immediately down and the router re-connect again.