User Guide

Understanding 43
Novell DNS/DHCP Management Utility Administration Guide
103-000164-001
September 4, 2001
Novell Confidential
Manual 99a38 July 17, 2001
The DHCPSRVR.NLM software supports local address assignments that
obtain IP addresses from multiple local subnets. For example, a DHCP server
might have multiple IP addresses bound to one of its network interface cards.
Each address is a server address on a separate subnet. No special configuration
of the eDirectory database is required.
The DHCPSRVR.NLM software also supports remote address assignments
that obtain IP addresses from multiple remote subnets. This feature requires
all such subnets to be identified with a Subnet Pool object.
DHCP Options
Novell DNS/DHCP Services supports vendor options, DHCP options, and
BOOTP parameters as defined in Internet RFC 2132 with a few exceptions.
Novell DNS/DHCP Services supports new options defined for NetWare over
TCP/IP and existing NetWare/IP options.
NOTE: The following options are not supported in this release of Novell DNS/
DHCP Services: 56, 57, 60, 66, and 67. Although options 66 and 67 are not
supported, the equivalent BOOTP parameter function is provided.
Assigning Options
DHCP and BOOTP options can be assigned at three levels:
 Globally
 At the subnet level
 IP address level
The DHCP server's options inheritance rules specify that options assigned at
the lowest level override options set at a higher level. For example, options
have been assigned at all three levels for the client on the subnet, as shown in
Table 4.
Table 4 Example of DHCP Options Assignment
Level Option Value
Global 1, Subnet Mask 255.255.0.0
3, Router 132.57.3.8
4, Time Server 129.23.120.5