To set up a DHCP server, create and edit a dhcpd.conf file in the /etc directory of your server. The following is a sample dhcpd.conf file:
[You must customize the file by inserting the appropriate DHCP directives, IP ranges, subnet masks, and so on here.]
next-server command tells the DHCP
client where to send the TFTP get request.
filename command tells the DHCP client
which file to get. In this example, the file is pxelinux.0.
When you have finished creating the dhcpd.conf file, restart the DHCP server: