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24May/100

How To change MTU size under FreeBSD and Linux

The maximum transmission unit (MTU) of a layer of a communications protocol is the size (in bytes) of the largest protocol data unit that the layer can pass onwards.

1. Changing the MTU size with ifconfig tool

In order to change the MTU size, use ifconfig as follows:

ifconfig [Interface] mtu [SIZE] up
ifconfig eth0 mtu 1500 up

NOTE: This will only work if supported by both the network interface card and the network components such as switch.

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