In case you are running Debian Lenny on one or another Dell PowerEdge server or a bunch of servers from the R series (like the R410), there might occur a problem with the firmware of the Broadcom NetXtreme II network interface cards when your are updating the kernel from the official repositories. The warning message is like:
“W: Possible missing firmware /lib/firmware/bnx2-09-4.0.5.fw for module bnx2″
In that case you can easily fix the problem with adding the non-free repository to your /etc/apt/sources.list
deb http://ftp.de.debian.org/debian/ lenny main non-free contrib
and then run
aptitude update && aptitude install firmware-bnx2
This will install the required firmware and rebuild your kernel initrd to include the firmware at boot time.