hi Eric ,
i have made that file by copy pasting , nimu_eth.c multiple time till i got the size. i will zip and share the exact file also.
i willl also try with mcsdk setup.exe as the file here and see if iperf fragments the packet.
can you try with some other speeds.
as far as i know wireshark shows both the fragments in white or light gray and then the combined one as blue. which will be the total packet.
whether by default ndk supports fragmented udp packets.