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Attributes, Schema extensions – Dell KVM 2321DS User Manual

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LDAP Feature for the Remote Console Switch

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Attributes

There is one more hierarchy used in AD. Associated with each object class is a

set of “attributes” used to store specific information about the entity that is

being represented. For example, associated with the User object class is an

attribute type named SAM ACCOUNT NAME and others such as FIRST

NAME, SURNAME, PASSWORD, etc. The suite of Dell Remote Console

Switches uses the SAM ACCOUNT NAME and PASSWORD attributes to

authenticate a user (the formal AD names for these two attributes are

sAMAccountName and unicodePWD, respectively).

Schema Extensions

AD is packaged with many object classes, including default containers for

Computer and User objects as well as classes for OU containers and classes to

represent computer and user entities. AD can be extended to include new

object classes such as those provided by Dell to simplify the administration of

access controls; such extensions are usually referred to as “schema extensions”

and are at the heart of the Dell Extended Schema feature described in this

document. These schema extensions provide customized object classes to

represent Dell Remote Console Switches, access control information, and a

type of container used to associate specific access control information with

specific instances of Dell Remote Console Switches and Users. It is important

to note that each attribute type and object class used in AD must have a

globally unique identifier, known as an Object Identifier (OID). These

unique identifiers are ultimately managed by internationally recognized

authorities. For AD, the OID space is managed secondarily by Microsoft. Dell

has obtained OIDs for the custom object classes and attribute types used in

the Dell Extended Schema feature. The following is a summary of the OIDs

Dell obtained:
Dell extension is: dell
Dell base OID is: 1.2.840.113556.1.8000.1280
RCS LinkID range is: 12070 to 12079

The suite of Dell Remote Console Switches is also designed to function using

only object classes present in the AD packaged classes; this option is known as

the Standard Schema. Under this option, the Computer object class is used

to represent Dell Remote Console Switches and standard Group objects are