User`s manual

P-660 Series Support Notes

• SNMPv1 Operations

SNMP itself is a simple request/response protocol. 4 SNMPv1 operations are defined

as below.

• Get

Allows the NMS to retrieve an object variable from the agent.

• GetNext

Allows the NMS to retrieve the next object variable from a table or list within

an agent. In SNMPv1, when a NMS wants to retrieve all elements of a table

from an agent, it initiates a Get operation, followed by a of GetNext

operations.

• Set

Allows the NMS to set values for object variables within an agent.

• Trap

Used by the agent to inform the NMS of some events.

The SNMPv1 messages contains two part. The first part contains a version and a

community name. The second part contains the actual SNMP protocol data unit (PDU)

specifying the operation to be performed (Get, Set, and so on) and the object values

involved in the operation. The following figure shows the SNMPv1 message format.