Dell OpenManage Server Administrator Managed Node for Fluid Cache for DAS User's Guide download pdf (Page 33)

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Introduction 35

FILE LOCATION: C:\Projects -Solutions\SNMP\Mainak\SNMPc1.fm

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For each MIB group that has unique variable definitions, tables are included

in the last section of the section to explain the meaning of the terms.

Standards for writing MIBs are defined by the Internet Engineering Task

Force (IETF). Structure of Management Information (SMI) is a standard that

specifies the rules for defining the structure and type of managed objects and

events in a MIB. SMIv1 is specified in Request For Comments (RFC) 1155.

The Server Administrator MIB conforms to the SMIv1 standard.

SNMP is a systems management standard originally designed for network

management. SNMP manages much more than networks. Information

Technology (IT) professionals use SNMP for monitoring and managing

computer systems and the various components and peripherals supported by

their systems.

SNMP standards are defined by the Internet Engineering Task Force (IETF).

SNMP version 1 was published in August 1988 and is the most commonly

supported version of SNMP. SNMP version 2 was first published in May 1993,

but has not gained widespread market acceptance. SNMP version 3 was

recently completed and has addressed security issues that exist in version 1.

All SNMP systems consist of one or more managed systems that provide data

through an SNMP agent to a management system. The management system

provides a user interface to view data from the managed systems. The

management system and managed systems communicate over a network

(typically through User Datagram Protocol/Internet Protocol [UDP/IP]).

The management system and a managed system communicate by means of a

common data schema. SNMP MIB files define the structure, type, and values

of the SNMP data. While MIBs can be standardized or enterprise specific,

most operating systems supply SNMP agents for the standard MIB-I and

MIB-II schemas. MIB-I defines a base set of standard management information

for systems implementing the Internet Protocol (IP) suite. MIB-II defines

characteristics of the system, characteristics of network interfaces, and

characteristics of components of the IP on the system. In addition to the

standard MIBs, many hardware vendors have defined MIBs that provide

management data specific to their systems and peripheral devices.

Monitored data can be retrieved through SNMP using the Get command.

Typically, this command requires the host name or IP address of the target

machine as well as the OID of the data to retrieve. Exact details are dependent

on the operating system and the development tools being used to create the

management application. The Get command has a variant known as GetNext.

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