mtu

This command sets the maximum transmission unit of the Ethernet interface.

Syntax

mtu bytes

Parameters

bytes: Specifies the maximum size in bytes. Enter a value in the range 576 - 16128. The default value is 1500.

Guidelines

The mtu command sets the maximum transmission unit (MTU) for the Ethernet interface. The MTU is determined regardless of the length of the layer 2 encapsulation.

When the Ethernet interface is part of a VLAN interface, the MTU of the VLAN interface cannot be greater than the MTU for the Ethernet interface.
When the Ethernet interface is part of an aggregate interface, the MTU of the aggregate interface overrides the MTU of the Ethernet interface.

Example

Set the MTU to 4 KB.

# mtu 4096