Setting mtu value in eth0 config files?

[Joao Pedro Clemente <jpcl@rnl.ist.utl.pt>]

How can I set u the mtu valeu that I want in my eth0 interface?

I need this cause I am behind a DSL line with a ICS sharing..
MTU needs to be set lower than 1500 to work properly, so I'm setting it to
1450 by hand every time I boot..

Any ideia wher I can add MTU to a config file? Or I need to hack some
"if-up" script??

Thank you

-- 
		        	Joao Pedro Clemente
        			jpcl @ rnl.ist.utl.pt
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