Technical data

Configuring the DHCP Server
7.5 Using DHCP GUI to Configure DHCP
Free List Size
Specifies the size of the internal array specifying the number of address blocks
held on the free list. If this number is too high, the server will lose previous
allocations of expired leases quickly. If this number is too low, performance can
suffer.
The default setting is 8.
Ignore Hardware Type
This toggle tells the server to use the clients’ hardware address as its identifier
(for those clients that do not use DHCP client identifiers), but to ignore the
hardware type field. In the DHCP DB the identifier is stored with a type field of
zero (which is also the type for those clients which are using client identifiers).
Set this option to True only to work around problems introduced by clients that
broadcast multiple DHCP requests with conflicting hardware types (for example,
HP Jet Direct). The default value is False.
Ignore Name Owner
This parameter applies only if both "Assign Name by Hardware Address" and
"Accept Client Name" are True. In such a case, a previously established name-
hardware address binding with the same name will be overwritten with the MAC
address of the requesting client in DHCP’s internal name database.
Listen on PPP Interfaces
Not currently supported.
If True, the server will respond to DHCP requests on Point-to-Point Protocol
(PPP) interfaces of the host. By default, DHCP ignores these interfaces.
Min BOOTP Packet Size
Specifies the minimum packet size for DHCP requests. Change this value to
allow the Server to work with some noncompliant DHCP clients that send DHCP
requests smaller than the minimum required packet length.
The default minimum packet size is 300 bytes.
Name Service
Specifies the implementation of the underlying name service. Name service
authenticates, routes, addresses, and performs naming-related functions for other
computers on the network.
DNS is the only name service available with TCP/IP Services.
Name Service Updatable
Choose True to have TCP/IP Services automatically update the name service with
the assigned IP addresses and host names.
Ping BOOTP Clients
Before the DHCP server assigns an IP address to a BOOTP client, the server
checks to see if the address is available by using ping to send an Internet Control
Message Protocol (ICMP) echo request. If the server receives a reply, it logs an
error. Then:
• If the address was from the dynamic pool, the server marks it as unavailable,
and selects a new address from the pool.
• If the address was statically configured, the server refuses to configure the
client.
Configuring the DHCP Server 7–29