Chapter 21 SNMP
P-2601HN(L)-F1 Series User’s Guide
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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.
•
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.
Click
Maintenance > SNMP
to open the following screen. Use this screen to
configure the ZyXEL Device SNMP settings.
Figure 103
Maintenance > SNMP
The following table describes the fields in this screen.
Table 66
Maintenance > SNMP
LABEL
DESCRIPTION
Get Community
Enter the
Get Community
, which is the password for the incoming
Get and GetNext requests from the management station. The default
is public and allows all requests.
Set Community
Enter the
Set community
, which is the password for incoming Set
requests from the management station. The default is public and
allows all requests.
Trap Community
Type the trap community, which is the password sent with each trap to
the SNMP manager. The default is public and allows all requests.
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