authoritative; subnet 192.168.0.0 netmask 255.255.255.0 { # disable DHCP on ISP#1 upstream network } subnet 192.168.1.0 netmask 255.255.255.0 { # disable DHCP on ISP#2 upstream network } subnet 10.0.0.0 netmask 255.255.255.0 { range 10.0.0.100 10.0.0.250; option domain-name-servers 10.0.0.1; option domain-name "mydomain.com"; option routers 10.0.0.1; } host fixed-ip-pc { hardware ethernet 12:34:56:78:9a:bc; fixed-address 10.0.0.95; }