Dell KVM 1082DS - Manual (Page 118)

108 xxx | LDAP Feature for the RCS xxx
The suite of Dell RCSs 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
RCSs and standard Group objects are used to associate specific access control
information with specific instances of Dell RCSs and Users. In this case, access
control information is stored in a specific attribute type in the Group object.
The hierarchical structures present in AD can complicate your ability to access
information stored in the directory objects. To avoid potential delays associated
with navigation of the hierarchies, the suite of Dell Remote Console Switches is
designed to use an aspect of AD known as the Global Catalog (GC). The GC
provides a “quick look-up” service by providing access to a subset of the data
stored in the complete AD database and by “collapsing” all of the hierarchies
and geographic distribution into a single relatively flat structure. The GC is
queried using the same LDAP directory queries that work on the complete AD
database. The AD product requires at least one of the Domain Controllers in an
enterprise to also be configured to provide GC services and actual deployments
of AD can have any or all of the Domain Controllers configured to provide GC
services. The suite of Dell RCSs uses DNS to determine the network
coordinates of each GC server so that the Dell RCSs can gracefully handle
situations where some GC servers are not available on the network. DNS SRV
records are used for this purpose so that the Dell RCSs always attempt to
contact alternative GC servers at the “nearest” site first, depending on the
administrative settings configured in the SRV records.
Standard Schema versus Dell Extended
Schema
To provide the greatest flexibility in the multitude of customer environments,
Dell provides a group of objects that can be configured by the user depending on
the desired results. Dell has extended the schema to include an Association,
Device, and Privilege object. The Association object is used to link together the
users or groups with a specific set of privileges to one or more SIPs. The Device
Object defines the individual RCSs within the Active Directory structure and