Snmp Terms; Snmp Commands - StorageTek L180 Installation Manual

SNMP Terms

SNMP uses a manager/agent structure, a database, and a small set of commands
to exchange information. SNMP terms include:
• Agent–A module that resides within a managed device. The agent is
responsible for responding to requests from the manager and for sending
traps to a recipient that informs the systems administrator of potential
problems.
• Community string–Applications use community strings for access control.
The manager includes the community string in the SNMP messages to the
agent. The agent consequently can accept or reject the operation.
• Managed device–A device that hosts the services of an SNMP agent that
provides monitored information and controlled operations using SNMP.
L-series libraries are managed devices.
• Management Information Base (MIB)–A collection of information stored
in a database that contains configuration and statistical information for a
managed device. For L-series libraries, a copy of the MIB is loaded with
microcode and stored on the processor card. See
Base" on page D-4
• Manager–The thing that provides the communication link between the
systems administrator and the managed devices on the network. A manager
station or server allows the systems administrator to get information about
the device through the MIB and to receive traps from an agent.
• Recipient–A location on a manager where the SNMP agent sends traps.
This location is defined by the combination of either the IP address or DNS
name and the port number. The default recipient port number is 162.
• Trap–A message that reports a problem, error, or a significant event that
occurred within the device.

SNMP Commands

SNMPv1 offers a limited number of commands that follow a simple request/
response exchange to communicate between the manager and the agent.
The manager issues requests such as:
•
•
•
The agent responds with:
•
•
95896
for more information about the MIB.
A request for information of a specific variable.
Get–
A request for the next specific variable.
GetNext–
Set– A request to change the value of a specific variable.
A response to the manager's
Get-Response–
An asynchronous message to the recipient about an error or event.
Trap–
Eleventh Edition
StorageTek Proprietary
SNMP Terms
"Management Information
and commands.
Get GetNext
D-3