NFD

Tested Ethernet face on a Jumbo frame enabled face. The MTU is 9000 bytes.

$ ifconfig
p2p2: flags=4163 mtu 9000
inet xx netmask 255.255.255.252 broadcast xx
inet6 xx prefixlen 64 scopeid 0x20
ether xx txqueuelen 10000 (Ethernet)
RX packets 3024380 bytes 2175073663 (2.0 GiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 6210823 bytes 7606515260 (7.0 GiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

NFD always reports MTU = 1500 bytes

1418755213.108174 WARNING: [EthernetFace] ifr_mtu = 9000
1418755213.108205 DEBUG: [EthernetFace] [id:-1,endpoint:p2p2] Interface MTU is: 1500

This happens since in /ndn-cxx/src/util/ethernet.hpp, MAX DATA LENGTH is 1500 bytes.

47: const size_t MAX_DATA_LEN = 1500;

and on NFD/daemon/face/ethernet-face.cpp,

447: mtu = std::min(mtu, static_cast(ifr.ifr_mtu));