ZyXEL Communications Prestige 652, Руководство пользователя, Страница: 374 / 521

Prestige 652 Series User’s Guide
35-2 SNMP Configuration
An agent is a management software module that resides in a managed device (the Prestige). 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 the 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.
•
Set - Allows the manager to set values for object variables within an agent.
•
Trap - Used by the agent to inform the manager of some events.
35.2 Supported MIBs
The Prestige supports RFC-1215 and MIB II as defined in RFC-1213 as well as ZyXEL private MIBs. The
focus of the MIBs is to let administrators collect statistic data and monitor status and performance.
35.3 SNMP Configuration
To configure SNMP, select option 22 from the main menu to open Menu 22 — SNMP Configuration as
shown next. The “community” for Get, Set and Trap fields is SNMP terminology for password.