Debian-Installer: network boot
For booting debian-installer floppy images over network see:
DebianInstaller/NetbootPXE (for i386 boxes with PXE-enabled NICs)
DebianInstaller/BootpTFTP for most architectures
DebianInstaller/Mknbi for IBM PC (etherboot NICs)
DebianInstaller/MknbiDos for IBM PC (etherboot NICs)
Some network cards annoyingly do not have their firmware in ROM but rather load the firmware from the host operating system. This is not too much of a problem until you realise that much of the firmware is non-free and so cannot be included in the standard debian-installer images. The page DebianInstaller/NetbootFirmware explains how you can easily add firmware to the standard netboot images.
BootFloppy - how to build a custom installation floppy