SNMP Configuration and Management Manual

The NonStop SNMP Environment

SNMP Configuration and Management Manual—424777-006

1-7

General SNMP Message Format

Each PDU is embedded in a message, or packet, beginning with a version number and

a community name. The version number identifies the version of SNMP being

implemented; currently, this value is always 1 for NonStop SNMP messages. The

community name identifies one or more SNMP managers; it is used for access

control. Following the version and community identifiers is one of the five types of

PDUs.

Request PDUs

The three kinds of request PDUs have the same format as the response PDU, but the

error-status and error-index fields are always set to 0. The request-id uniquely

identifies individual requests. Variable-bindings are a list of variable names and

corresponding values.

Figure 1-3. Format of SNMP Messages

version community PDU

PDU type request-id 0 0 variable-bindings

PDU type request-id error-status error-index variable-bindings

PDU type enterprise

agent-

address

generic-

trap

specific-

trap

time-

stamp

variable-bindings

General SNMP Message Format

Format of GetRequest, GetNextRequest, and SetRequest PDUs

Format of GetResponse PDU

Format of Trap PDU

name-1 value-1 name-n value-n

Format of Variable Bindings

VST011.vsd