Users Guide

• If DHCP is enabled on CMC and you want to use the DNS address obtained automatically by the
DHCP server, type the following command:
racadm config -g cfgLanNetworking -o
cfgDNSServersFromDHCP 1
• If DHCP is disabled on CMC or you want manually to input your DNS IP address, type the
following commands:
racadm config -g cfgLanNetworking -o
cfgDNSServersFromDHCP 0
racadm config -g cfgLanNetworking -o
cfgDNSServer1 <primary DNS IP address>
racadm config -g cfgLanNetworking -o
cfgDNSServer2 <secondary DNS IP address>
Extended Schema Active Directory Overview
Using the extended schema solution requires the Active Directory schema extension.
Active Directory Schema Extensions
The Active Directory data is a distributed database of attributes and classes. The Active Directory schema
includes the rules that determine the type of data that can be added or included in the database. One
example of a class that is stored in the database is the user class. Some example user class attributes can
include the user’s first name, last name, phone number, and so on.
You can extend the Active Directory database by adding your own unique attributes and classes for
specific requirements. Dell has extended the schema to include the necessary changes to support
remote management authentication and authorization using Active Directory.
Each attribute or class that is added to an existing Active Directory Schema must be defined with a unique
ID. To maintain unique IDs across the industry, Microsoft maintains a database of Active Directory Object
Identifiers (OIDs) so that when companies add extensions to the schema, they can be guaranteed to be
unique and not to conflict with each other. To extend the schema in Microsoft's Active Directory, Dell
received unique OIDs, unique name extensions, and uniquely linked attribute IDs for the attributes and
classes that are added into the directory service.
• Dell extension: dell
• Dell base OID: 1.2.840.113556.1.8000.1280
• RAC LinkID range: 12070 to 12079
Overview of Schema Extensions
Dell has extended the schema to include an Association, Device, and Privilege property. The Association
property is used to link together the users or groups with a specific set of privileges to one or more RAC
devices. This model provides an administrator maximum flexibility over the different combinations of
users, RAC privileges, and RAC devices on the network without much complexity.
When there are two CMCs on the network that you want to integrate with Active Directory for
authentication and authorization, create at least one association object and one RAC device object for
each CMC. You can create multiple association objects, and each association object can be linked to as
many users, groups of users, or RAC device objects as required. The users and RAC device objects can be
members of any domain in the enterprise.
143