Examples
# Set the MTU to 1430 bytes for Layer 3 Ethernet interface GigabitEthernet 3/0/1.
<Sysname> system-view
[Sysname] interface GigabitEthernet 3/0/1
[Sysname-GigabitEthernet3/0/1] mtu 1430
# Set the MTU to 1400 bytes for Layer 3 Ethernet subinterface GigabitEthernet 3/0/1.1.
<Sysname> system-view
[Sysname] interface GigabitEthernet 3/0/1.1
[Sysname-GigabitEthernet3/0/1.1] mtu 1430
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