Comment 3 for bug 1697264

it is weird, because see my test bellow. It is working. Do you have enabled hugepages or anything specific?

$ sudo ip link set mtu 1400 dev eth0
$ ping -s 1410 192.168.50.3
PING 192.168.50.3 (192.168.50.3): 1410 data bytes
1418 bytes from 192.168.50.3: seq=0 ttl=64 time=1.683 ms
1418 bytes from 192.168.50.3: seq=1 ttl=64 time=0.458 ms
1418 bytes from 192.168.50.3: seq=2 ttl=64 time=0.627 ms
1418 bytes from 192.168.50.3: seq=3 ttl=64 time=0.626 ms
1418 bytes from 192.168.50.3: seq=4 ttl=64 time=0.603 ms
1418 bytes from 192.168.50.3: seq=5 ttl=64 time=0.619 ms
1418 bytes from 192.168.50.3: seq=6 ttl=64 time=0.612 ms
^C
--- 192.168.50.3 ping statistics ---
7 packets transmitted, 7 packets received, 0% packet loss
round-trip min/avg/max = 0.458/0.746/1.683 ms
$ exit
Connection to 169.254.0.3 closed.
root@cmp001:~# uname -a
Linux cmp001 4.8.0-54-lowlatency #57~16.04.1-Ubuntu SMP PREEMPT Wed May 24 18:53:23 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux