doc/ja_JP.eucJP/dhcp-eval.5

if option dhcp-user-class = "accounting" {
 max-lease-time 17600;
 option domain-name "accounting.example.org";
 option domain-name-servers ns1.accounting.example.org,
 ns2.accounting.example.org;
} elsif option dhcp-user-class = "sales" {
 max-lease-time 17600;
 option domain-name "sales.example.org";
 option domain-name-servers ns1.sales.example.org,
 ns2.sales.example.org;
} elsif option dhcp-user-class = "engineering" {
 max-lease-time 17600;
 option domain-name "engineering.example.org";
 option domain-name-servers ns1.engineering.example.org,
 ns2.engineering.example.org;
} else {
 max-lease-time 600;
 option domain-name "misc.example.org";
 option domain-name-servers ns1.misc.example.org,
 ns2.misc.example.org;
}