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Figure 230. SNMP Basic Block Diagram
With this method, the 3494 Tape Library can be monitored at one or more
locations, along with other equipment (both IBM and non-IBM) that also supports
the SNMP protocol. Monitoring is independent of the host system that is
controlling the equipment and is independent of the location of the 3494 Tape
Libraries.
The Library Manager contains limited SNMP support. This section discusses how
to use the Library Manager's SNMP features.
The Library Manager generates SNMP trap messages to inform network
monitoring stations that certain events have occurred on the 3494 Tape Library. The
Library Manager code does not contain any SNMP Management Information Base
(MIB) support.
The Library Manager code offers the ability to monitor the following Library
Manager events:
v OPINT - Operator Interventions
v UNSOL - Unsolicited Attention Messages
v SERVC - Service Request Messages (not supported currently)
v CHCK1 - Library Manager Check1 Conditions
v TESTM - Test SNMP Trap Message
OPINT Events
OPINT events inform the monitoring station of the state of the 3494 Tape
Library. They can inform the monitor station that the 3494 Tape Library has
developed problems and can even request service calls. All OPINT
messages are located in the OPINT message table (see Table 18 on page
365).
OPINT traps are the best way to monitor the 3494 Tape Library, and these
Library Manager trap types should be selected at all times.
UNSOL Events
UNSOL events offer additional support to the OPINT messages. They are
not as helpful as the OPINT message, but they can be used to track drive
availability, volume movement, and so on.
In order to receive UNSOL messages, the 3494 Tape Library must be
online, and it must have at least one host. All UNSOL messages are located
in the UNSOL message section (see "UNSOL Library Manager SNMP
Traps" on page 373).
CHCK1 Events
CHCK1 events are posted when the Library Manager code encounters
problems that require re-initializing the Library Manager.
Chapter 6. Advanced Operating Procedures
357
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