Below output is from a 2901 router DMVPN tunnel interface.
Why is the MTU size different between these outputs?
What exactly means "Tunnel transport MTU 1472 bytes"?
Why is the second bold data so specifically "MTU 17912?"
(obfuscated) 2901#sh ip int tu33 Tunnel33 is up, line protocol is up Internet address is 192.168.0.1/24 Broadcast address is 255.255.255.255 Address determined by non-volatile memory MTU is 1400 bytes Helper address is not set !! (output omitted) !! 2901# 2901# 2901#sh int tu33 Tunnel33 is up, line protocol is up Hardware is Tunnel Internet address is 192.168.0.1/24 MTU 17912 bytes, BW 20000 Kbit/sec, DLY 50000 usec,