HOWTO Change the MTU of an interface on Debian
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This article was first written in September 2005 for the BeezNest technical website (http://glasnost.beeznest.org/articles/290).To change the MTU of an interface on GNU/Linux, you just need to tell ifconfig to do so, like this for example:
/sbin/ifconfig eth0 mtu 1492To change it permanently on Debian, put it in the /etc/network/interfaces, where almost all network parameters are found. To do this, just add a line mtu to the definition of your interface.