These are general preparation for support of each feature: dhcpd.etherboot dhcpd.fai dhcpd.pxe dhcpd.pxelinux ... They must not introduce configuration parameters that interfere with other hosts. Ideally they must not conflict with each other, but that may be unavoidable (at least include a note about conflicting files). These are host-specific option, that must be included within a host or group clause: dhcpd.etherboot.host dhcpd.etherboot.host-udhcp dhcpd.pxe.host dhcpd.pxe.host-mcast dhcpd.pxelinux.host ...