[B.A.T.M.A.N.] MTU issue

Hi All

We are having a small isue with mtu, on certain builds, could be only the latest, we are getting this error in wrt.

batman_adv: bat0: The MTU of interface wlan0 is too small (1527) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1528 would solve the problem.

I had the same issue previously, but 1528 did not do it. I have since changed build on that unit and can't remember the actual value I used, But it was larger.

All I did was increase the value until the warning disappeared, and everything started working as advertised.

Any idea's?

Wayne A