# ip a | grep mtu
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1600 qdisc mq state UP qlen 1000
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1600 qdisc mq state UP qlen 1000
4: eth2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000
5: eth3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000
6: ovs-system: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN
7: br-int: <BROADCAST,UP,LOWER_UP> mtu 1600 qdisc noqueue state UNKNOWN
25: br-ex: <BROADCAST,UP,LOWER_UP> mtu 1600 qdisc noqueue state UNKNOWN
26: bond0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1600 qdisc noqueue state UNKNOWN
27: br-ex.100@br-ex: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP
28: br-ex.104@br-ex: <BROADCAST,UP,LOWER_UP> mtu 1600 qdisc noqueue state UP
29: phy-br-ex: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1600 qdisc pfifo_fast state UP qlen 1000
30: int-br-ex: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1600 qdisc pfifo_fast state UP qlen 1000
31: br-tun: <BROADCAST,UP,LOWER_UP> mtu 1600 qdisc noqueue state UNKNOWN