Technical References

Controls whether the server examines the client-FQDN option
for the hostname. Default is true (enable).
If true, the server ignores any characters after the first dot (.)
because the domain is determined from the scope.
If false, the server does not determine the hostname using this.
This is useful if the client is sending unexpected or junk
characters.
use-client-fqdn-first bool default = true
Controls whether the DHCP server looks at the client-FQDN option
on incoming packets first, before looking at the 'hostname'
option. Default is true (enable).
If true and the client-FQDN option specifies a hostname, the
server uses that hostname.
If the client-FQDN option is not present in the incoming packet,
the server uses the hostname from the 'hostname' option.
If false, the server also uses the hostname from the
'hostname' option.
use-dns-update-prereqs bool default = true
Controls whether the DHCP server adds prerequisites to DNS
update messages. Default true (enable).
If true, the DHCP server includes prerequisites in DNS update
messages to make sure the client is using the domain name,
before it is updated with the current lease (IP
address).
If false, the DHCP server assumes the requesting client is
entitled to the domain name. In this case, it does not include
prerequisites in the DNS update message, and associates the client
lease with that domain name.
Note: The DHCP server always adds prerequisites to the DNS
update message while adding a new domain name record on behalf
of a client acquiring a new lease and removing the domain name
record when a client releases its lease or the lease expires.
use-host-name bool default = true
Specifies whether the server looks at the 'hostname' option
for the hostname. Default is true (enable).
If true, the server obtains the hostname from the 'hostname'
option.
If false, the server does not obtain the hostname from this
option. This is useful if the client is sending unexpected or
junk characters.
use-ldap-client-data bool default = disabled
Controls whether the DHCP server attempts to read client-entry
data using the configuration supplied by the 'ldap'
command. Default is false (disable).
v6-client-class-lookup-id expr