ZyXEL Communications P-660 series Guía de usuario descargar pdf (Pagina 169)

Chapter 13 Remote Management Configuration

P-660R-F1 Series User’s Guide

169

13.6 SNMP

Simple Network Management Protocol (SNMP) is a protocol used for exchanging management

information between network devices. SNMP is a member of the TCP/IP protocol suite. Your ZyXEL

Device supports SNMP agent functionality, which allows a manager station to manage and monitor

the ZyXEL Device through the network. The ZyXEL Device supports SNMP version one (SNMPv1)

and version two (SNMPv2). The next figure illustrates an SNMP management operation.

Note: SNMP is only available if TCP/IP is configured.

Figure 102 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 ZyXEL 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.

• GetNext - Allows the manager to retrieve the next object variable from a table or list within an

agent. In SNMPv1, when a manager wants to retrieve all elements of a table from an agent, it

initiates a Get operation, followed by a series of GetNext operations.

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ZyXEL Communications P-660 series Guía de usuario Pagina 169