ZyXEL Communications G-2000 Plus V2, Руководство пользователя

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ZyXEL G-2000 Plus v2 User’s Guide
314 Chapter 30 SNMP Configuration
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.
30.2 Supported MIBs
The ZyXEL device supports RFC-1215 and MIB II as defined in RFC-1213. The focus of the
MIBs is to let administrators collect statistic data and monitor status and performance.
30.3 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.