DHCP_TSIG_KEY_NAME
DHCP_TSIG_KEY_ALGO
DHCP_TSIG_KEY_SECRET

DHCP_DNS_SERVER
DHCP_TFTP_SERVER
DHCP_ROUTERS

DHCP_DOMAIN
DHCP_SITE_DOMAIN
DHCP_DYN_IPS_DOMAIN
DHCP_REV_DOMAIN

DHCP_SUBNET
DHCP_NETMASK
DHCP_IP_FIRST
DHCP_IP_LAST
DHCP_BROADCAST