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Dimension ES-2008 Ethernet Switch
12-2 SNMP
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.
12.1.1 Trap Manager
A trap manager is a management station that receives traps (the system alerts generated).
If no trap manager is defined, then no traps are generated.
12.2 Configuring SNMP
Click Administrator and then SNMP Management to display the screen shown next.