Brocade Communications Systems 53-1001778-01 Manual De Usuario

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Brocade SMI Agent User’s Guide
1
53-1001778-01
Chapter
1
Overview
In this chapter
Common Information Model (CIM)
The Common Information Model (CIM) is a conceptual, object-based information model defined by 
the Distributed Management Task Force (DMTF) for describing management, which is not bound to 
a particular implementation. This allows for the interchange of management information between 
management systems and applications.
CIM consists of two parts:
CIM Specification
CIM Schema
The CIM Specification describes the language, naming, metaschema, and mapping techniques to 
other management models, such as SNMP MIBs and FC-GS. The metaschema is a formal definition 
of the model that defines the terms used to express the model and their usage and semantics. The 
elements of the metaschema are classesproperties, and methods. The metaschema also 
supports indications and associations as types of classes and references as types of properties.
The CIM Schema provides the actual model descriptions. The CIM Schema supplies a set of 
classes with properties and associations that provide a well-understood conceptual framework 
within which it is possible to organize the available information about the managed environment. 
The CIM Schema itself is structured into three distinct layers:
Core Schema
Common Schema
Extension Schema
The Core Schema defines basic classes, such as a managed element or an association. The 
Common Schema provides a set of foundation classes that can be used as the super-class to 
describe other devices, such as a system, a device, or a network. The Extension Schema allows 
users to expand the definitions in the Common Schema to describe specific device types, such as a 
Brocade FC switch.
The formal definition of the CIM Schema is expressed in a managed object format (MOF) file, which 
is an ASCII file that can be used as input into a MOF editor, parser, or compiler to generate code for 
use in a provider or client application.
Web-Based Enterprise Management (WBEM) is a set of management and internet standard 
technologies to unify management of an enterprise. It includes CIM, CIM Schemas, CIM operations 
over HTTP, and CIM-XML encoding.