Choosing PPP MTU
radio
UART
RS-232 emulation
RFC 1662
PPP
IP
Fit each datagram inside the MAC frame
setting PPP MTU == MAC MTU doesn’t work
support fragementation
and reassembly
consistent overhead
byte stuffing (COBS)
strip off RFC 1662
framing
IP
radio
RFC 1662
RFC 1662
?
?
1500
> 1500
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