I have a Sparc based system (a MicroSparc II on a VME card) that is without a CDROM drive and has to be able to install SunOS or Solaris over the network (it has a local SCSI-2 disk and a fast Ethernet SBUS card).

I found some useful background information here on how to support Solaris network installations using just a Linux host:

http://hintshop.ludvig.co.nz/show/solaris-jumpstart-linux-server/

http://www.cs.toronto.edu/~cvs/unix/Solaris-Linux-NetInstall.html

http://www.znark.com/tech/solarisinstall.html

TBC