The nimbus boot process can be divided broadly into 3 stages. The first stage varies by the type of system while stages two and three are the same for all Nimbus clusters. The stages will be reviewed in order.
PXE boot begins by performing DHCP. The master runs a DHCP server daemon whichwill provide a temporary IP address on the boot net and instructions to load the pxelinux.0 binary boot loader. Please see IETF RFC 2131 for details.