@ref{Noise, noise}, @ref{Encless, encryptionless mode} or @ref{CPR} are
enabled, then all outgoing packets are filled up to that MTU value.
-Default MTU equals to 1514 bytes (1500 bytes of Ethernet payload, 14
+Default MTU equals to 1515 bytes (1500 bytes of Ethernet payload, 15
bytes of Ethernet header).