HP XP20000/XP24000 HP StorageWorks XP24000/XP20000 SNMP Agent Reference Guide - Page 7

SNMP Agent Functions, SNMP Traps

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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. Description All operations in a storage system stopped. Operation in a component where a failure occurred stopped. Partial failure. Minor failure. 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 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. GETNEXT 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. TRAP Reports an event (failure) to an SNMP manager. TRAP occurs without a request from the SNMP manager. SNMP Agent Overview 7

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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
Description
Events
All operations in a storage system stopped.
Acute failure detected.
Operation in a component where a failure occurred
stopped.
Serious failure detected.
Partial failure.
Moderate failure detected.
Minor failure.
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
Description
Operation
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.
GET
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.
GETNEXT
Reports an event (failure) to an SNMP manager.
TRAP occurs without a request from the SNMP manager.
TRAP
SNMP Agent Overview
7