# ip mtu

#### Syntax

[ no ] ip mtu [ mtuSize ]

#### Release Information

Command introduced before JunosE Release 7.1.0.

#### Description

Sets the maximum transmission unit size of IP packets sent on an interface. The no version restores the default value.

#### Options

- mtuSize—Maximum number of packet transmissions permitted on an interface; in the range 160–10240; default value is 0, which means that the router takes the value from a lower protocol layer

#### Mode

Interface Configuration, Profile Configuration, Subinterface Configuration