HP StorageWorks XP SNMP Agent Reference Guide: HP XP12000 Disk Array, HP XP10000 Disk Array, HP 200 Storage Virtualization System (AE002-96056, May 2011)

Management Information Base (MIB)
Each managed device has certain types of information, including the configuration information,
the status information for device, and statistical, which is known collectively as a Management
Information Base (MIB). Each parameter is called a managed object, and it consists of the parameter
name, one or more parameters, and a group of operations that can be executed with the object.
The MIB defines the type of information that can be obtained from a managed device, and the
device settings that can be controlled from a management system.
SNMP Manager Functions
Provides functions such as displaying the information gathered from multiple SNMP agents
graphically, accumulating the information in to a database, and analyzing problems using the
accumulated information.
For details, see the manual of the SNMP Manager.
SNMP Agent Functions
SNMP Traps
An SNMP agent reports an error of a storage system to 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, a nickname, a reference
code, and an identifier of component.
Table 3 (page 8) lists the events that trigger an SNMP agent trap.
Table 3 SNMP Trap Triggering Events
DescriptionEvents
All operations in a subsystem 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 Command
Table 4 (page 8) shows the types SNMP Agent operations.
Table 4 SNMP Agent Operations
DescriptionOperation
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
8 About SNMP Operations