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<td bgcolor="#336666"><b><font face="Arial" size="2" color="#FFFFFF">6.2</b></font></td>
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<font size="2" color="#FFFFFF"><span style="font-family: Arial">Network
Management</span></font></strong></td>
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<td bgcolor="#669999" height="25"><b>
<font face="Arial" size="2" color="#FFFFFF">6.2.2</font></b></td>
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<td bgcolor="#669999" height="25" width="100%"><strong>
<font size="2" color="#FFFFFF"><span style="font-family: Arial">OSI and
network management model</span></font></strong></td>
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<p><font face="Arial" size="2">The International Standards Organization (ISO) created a
committee to produce a model for network management, under the
direction of the OSI group.</font></p>
<p><font face="Arial" size="2">This model has four parts:</font></p>
<ul>
<li><font face="Arial" size="2">Organization </font></li>
<li><font face="Arial" size="2">Information </font></li>
<li><font face="Arial" size="2">Communication </font></li>
<li><font face="Arial" size="2">Functional </font></li>
</ul>
<p><font face="Arial" size="2">This is a view of network management from the top-down, divided into
four submodels and recognized by the OSI standard.
<img border="0" src="../../images/1.gif" align="absmiddle" width="12" height="12"></font></p>
<p><font face="Arial" size="2">The Organization model
<img border="0" src="../../images/2.gif" align="absmiddle" width="12" height="12"> describes the components of network management
such as a manager, agent, and so on, and their relationships. The arrangement
of these components leads to different types of architecture, which
will be discussed later.</font></p>
<p><font face="Arial" size="2">The Information model is concerned with
structure and storage of network management information.
<img border="0" src="../../images/3.gif" align="absmiddle" width="12" height="12"> This information is stored
in a database, called a management information base (MIB). The ISO
defined the structure of management information (SMI) to define the
syntax and semantics of management information stored in the MIB. MIBs and SMI will be covered in more depth later.</font></p>
<p><font face="Arial" size="2">The Communication model deals with how the management data is
communicated between the agent and manager process.<img border="0" src="../../images/4.gif" align="absmiddle" width="12" height="12">
It is concerned with
the transport protocol, the application protocol, and commands and
responses between peers.</font></p>
<p><font face="Arial" size="2">The Functional model addresses the network management applications
that reside upon the network management station (NMS).
<img border="0" src="../../images/5.gif" align="absmiddle" width="12" height="12"> The OSI network
management model categorizes five areas of function, sometimes
referred to as the FCAPS model:</font></p>
<ul>
<li><font face="Arial" size="2">Fault</font></li>
<li><font face="Arial" size="2">Configuration</font></li>
<li><font face="Arial" size="2">Accounting </font></li>
<li><font face="Arial" size="2">Performance</font></li>
<li><font face="Arial" size="2">Security</font></li>
</ul>
<p><font face="Arial" size="2">This network management model has gained broad acceptance by vendors
as a useful way of describing the requirements for any network
management system.</font></p>
<p><font face="Arial" size="2"> </font> </p>
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