Snmp; Chapter 18 Snmp; About Snmp; Figure 57 Snmp Management Model - ZyXEL Communications Dimension ES-1552 User Manual

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H A P T E R
This chapter describes how to user Simple Network Management Protocol (SNMP) to manage
and monitor the switch.

18.1 About SNMP

Simple Network Management Protocol (SNMP) is an application layer protocol used to
manage and monitor TCP/IP-based devices. SNMP is used to exchange management
information between the network management system (NMS) and a network element (NE). A
manager station can manage and monitor the switch through the network via SNMP version
one (SNMPv1), SNMP version 2c or SNMP version 3. The next figure illustrates an SNMP
management operation. SNMP is only available if TCP/IP is configured.

Figure 57 SNMP Management Model

An SNMP managed network consists of two main components: agents and a manager.
An agent is a management software module that resides in a managed switch (the switch). An
agent translates the local management information from the managed switch into a form
compatible with SNMP. The manager is the console through which network administrators
perform network management functions. It executes applications that control and monitor
managed devices.
The managed devices contain object variables/managed objects that define each piece of
information to be collected about a switch. Examples of variables include number of packets
received, node port status and so on. A Management Information Base (MIB) is a collection of
managed objects. SNMP allows a manager and agents to communicate for the purpose of
accessing these objects.
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SNMP

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