# Pastebin ntig0PIk
root@st04:/var/log/ceph# ifconfig em50 mtu 9216
root@st04:/var/log/ceph# ifconfig p1p2 mtu 9216
root@st04:/var/log/ceph#   ifconfig bond0.64 mtu 9000
SIOCSIFMTU: Numerical result out of range