``` # # option domain-name "example.org"; option domain-name-servers ns1.example.org, ns2.example.org; default-lease-time 600; # 默认超时时间 max-lease-time 7200; # 最大超时时间 #ddns-update-style none; # 定义服务器动态更新的类型，包括 none（不支持动态更新）、interim（互动更新模式）与 ad-hoc（特殊更新模式） #authoritative; log-facility local7; subnet 10.152.187.0 netmask 255.255.255.0 { } subnet 10.254.239.0 netmask 255.255.255.224 { range 10.254.239.10 10.254.239.20; option routers rtr-239-0-1.example.org, rtr-239-0-2.example.org; } subnet 10.254.239.32 netmask 255.255.255.224 { range dynamic-bootp 10.254.239.40 10.254.239.60; option broadcast-address 10.254.239.31; option routers rtr-239-32-1.example.org; } subnet 10.5.5.0 netmask 255.255.255.224 { range 10.5.5.26 10.5.5.30; option domain-name-servers ns1.internal.example.org; option domain-name "internal.example.org"; option routers 10.5.5.1; option broadcast-address 10.5.5.31; default-lease-time 600; max-lease-time 7200; } host passacaglia { hardware ethernet 0:0:c0:5d:bd:95; filename "vmunix.passacaglia"; server-name "toccata.fugue.com"; } host fantasia { hardware ethernet 08:00:07:26:c0:a5; fixed-address fantasia.fugue.com; } class "foo" { match if substring (option vendor-class-identifier, 0, 4) = "SUNW"; } shared-network 224-29 { subnet 10.17.224.0 netmask 255.255.255.0 { option routers rtr-224.example.org; } subnet 10.0.29.0 netmask 255.255.255.0 { option routers rtr-29.example.org; } pool { allow members of "foo"; range 10.17.224.10 10.17.224.250; } pool { deny members of "foo"; range 10.0.29.10 10.0.29.230; } } ```