ZyXEL Communications EMG5324-D10A ユーザーズマニュアル

EMG5324-D10A User’s Guide

Simple Network Management Protocol is a protocol used for exchanging management information 
between network devices. Your Device supports SNMP agent functionality, which allows a manager 
station to manage and monitor the Device through the network. The Device supports SNMP version 
one (SNMPv1) and version two (SNMPv2c). The next figure illustrates an SNMP management 
operation.

SNMP Management Model

An SNMP managed network consists of two main types of component: agents and a manager. 

An agent is a management software module that resides in a managed device (the Device). An 
agent translates the local management information from the managed device 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 device. Examples of variables include such as number of 
packets received, node port status etc. 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.

SNMP itself is a simple request/response protocol based on the manager/agent model. The 
manager issues a request and the agent returns responses using the following protocol operations:

• Get - Allows the manager to retrieve an object variable from the agent.