Snmp Agent Functions - HP XP20000/XP24000 Reference Manual

Figure 3 Example of SNMP Operations

SNMP Agent Functions

SNMP Traps
An SNMP agent reports a storage system error to a SNMP manager using the trap report function.
If an error occurs, an SNMP agent issues an SNMP trap to an SNMP manager to report a failure.
Issuing an SNMP trap, an SNMP agent also reports a product number, nickname, reference code,
and an identifier of the component.
The following table lists the events that trigger an SNMP agent trap.
Table 1 SNMP Trap Triggering Events
Events
Acute failure detected.
Serious failure detected.
Moderate failure detected.
Service failure detected.
An SNMP agent logs the most recent 256 traps, so you can see the trap history of a particular
device.
SNMP Agent Operations
The following table lists the types SNMP Agent operations.
Table 2 SNMP Agent Operations
Operation
GET
GETNEXT
TRAP
Description
All operations in a storage system stopped.
Operation in a component where a failure occurred
stopped.
Partial failure.
Minor failure.
Description
Obtains a specific MIB object value.
GET REQUEST is the request from an SNMP manager, and
GET RESPONSE is the agent's response to that request.
Continuously finds a MIB object.
GETNEXT REQUEST is the request from an SNMP manager,
and GETNEXT RESPONSE is the agent's response to that
request.
Reports an event (failure) to an SNMP manager.
TRAP occurs without a request from the SNMP manager.
SNMP Agent Overview 7