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The library provides this error and diagnostic information as TapeAlert flags that
are reported to the application by the SCSI LOG SENSE command.
For a list of the TapeAlert flags for the drives and the library, refer to the IBM
TS4500 customer online documentation in the IBM Knowledge Center.
SNMP messaging
The Simple Network Management Protocol (SNMP) allows the TS4500 tape library
to send alerts over a LAN network to a monitoring server.
Occasionally, the TS4500 tape library might encounter situations that you want to
know about. These situations can be conditions that affect the library performance,
such as an open door that causes the library to stop. You might also want to log
user actions, such as a cartridge move or export that is initiated from the TS4500
management GUI. SNMP messages can alert you of these conditions.
The library provides a standard TCP/IP protocol that is called SNMP to send alerts
about conditions over a TCP/IP LAN network to an SNMP monitoring server.
These alerts are called SNMP traps. Using the information that is supplied in each
SNMP trap, the monitoring server (together with customer-supplied software) can
alert operations staff of possible problems or operator interventions that occur.
Many monitoring servers (like NetView) can be used to send email or pager
notifications when they receive an SNMP alert. For more information, see your
NetView documentation or the manual for your network management application.
The monitoring server must be loaded with systems management software that can
receive and process the trap. SNMP supports a get and get-response mechanism
for an operator to gather more information about a problem or query the library
about its status. Through a monitoring server, the operator issues a "get" using
SNMP to request information about the library. A get-response is the information
that is provided in response to the get. This type of support generally requires an
up-to-date library Management Information Base (MIB). The library's MIB contains
units of information that specifically describe an aspect of a system, such as the
system name, hardware number, or communications configuration.
IBM provides the MIBs that are supported by the library. They include:
v
IBM 3584 MIB for Version 2c traps
v
Storage Networking Industry Association (SNIA) Storage Media Library (SML)
MIB Version 1.12
v
SNIA SML MIB Version 1.20b
An operator cannot change library settings by using SNMP. Settings are changed
by using the TS4500 management GUI.
Figure 13 on page 60 shows the flow of SNMP communication from the library
over the Ethernet local area network (LAN) to an SNMP monitoring server.
Chapter 1. Overview
59
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