W: Possible missing firmware /lib/firmware/tigon/tg3_tso5.bin for module tg3
W: Possible missing firmware /lib/firmware/tigon/tg3_tso.bin for module tg3
W: Possible missing firmware /lib/firmware/tigon/tg3.bin for module tg3

The machine s Dell poweredge 1750 and.. here is the solution

vim /etc/apt/sources.list

and add..

deb http://ftp.us.debian.org/debian/ squeeze main contrib non-free

deb-src http://ftp.us.debian.org/debian/ squeeze main contrib non-free

apt-get update

apt-get install firmware-linux-nonfree