Setting the MTU for an automatically configured "eth" network interface?

[Jonathan Hirschman]

Gilles Gravier wrote:
> I would like to make this permanent... i.e. in some configuration file 
> so that every time I get a network connection on the eth0 interface, it 
> is with MTU set to 1492...
>

You can add directives such as mtu settings to the appropriate "stanza" 
in /etc/network/interfaces (see man interfaces). My guess is that you 
have this:

auto eth0
iface eth0 inet dhcp

Change it to:

auto eth0
iface eth0 inet dhcp
    mtu 1492

Then reboot. You should be done.

jh