ZyXEL Communications MAX318M2W, Руководство пользователя

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Chapter 12 Maintenance
MAX318M2W User’s Guide
162
SNMP
An SNMP managed network consists of two main types of component: agents and
a manager.
Figure 80 SNMP Management Model
An agent is a management software module that resides in a managed device (the
WiMAX 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.
The WiMAX Device supports MIB II that is defined in RFC-1213 and RFC-1215. The
focus of the MIBs is to let administrators collect statistical data and monitor status
and performance.
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.