# [...]

# Fixed IP addresses can also be specified for hosts.   These addresses
# should not also be listed as being available for dynamic assignment.
# Hosts for which fixed IP addresses have been specified can boot using
# BOOTP or DHCP.   Hosts for which no fixed address is specified can only
# be booted with DHCP, unless there is an address range on the subnet
# to which a BOOTP client is connected which has the dynamic-bootp flag
# set.

host desktop {
  hardware ethernet 01:23:45:67:89:10;
  fixed-address 192.168.1.2;
}
host laptop {
  hardware ethernet 01:23:45:67:89:11;
  fixed-address 192.168.1.3;
}

# [...]