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8-8
DHCP Server Operation
deny unknown-clients;
The
unknown-clients
flag is used to tell the DHCP server whether or not to
dynamically assign addresses to unknown clients. Dynamic address
assignment to unknown clients is
allo
wed by default.
bootp
allow bootp;
deny bootp;
The
bootp
flag is used to tell the DHCP server whether or not to respond to
BOOTP queries. BOOTP queries are
allo
wed by default.
booting
allow booting;
deny booting;
The
booting
flag is used to inform the DHCP server whether or not to
respond to queries from a particular client. This keyword only has meaning
when it appears in a
host
declaration. By default, booting is
allo
wed, but if it
is disabled for a particular client, then that client will not be able to get and
address from the DHCP server.
8.4.4 Parameters
default-lease-time
default-lease-time
tim
e;
Time
should be the length in seconds that will be assigned to a lease if the
client requesting the lease does not ask for a specific expiration time.
max-lease-time
max-lease-time
tim
e;
Time
should be the maximum length in seconds that will be assigned to a
lease if the client requesting the lease asks for a specific expiration time.
hardware
hardware
hardware-type hardware-addres
s;
In order for a BOOTP client to be recognized, its network hardware
address must be declared using a
hardware
clause in the
host
statement.
hardware-type
must be the name of a physical hardware interface type.
Currently, only the ethernet and token-ring types are recognized. The
hardware-address
should be a set of hexadecimal octets (numbers from 0
through ff) separated by colons. The
hardware
statement may also be used