Coyote Point Systems Equalizer GX Series, Руководство администратора

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Using SNMP Traps
Setting Up SNMP Traps
The Simple Network Management Protocol (SNMP) is an internet standard that allows a
management station to monitor the status of a device over the network. SNMP organizes
information about Equalizer and provides a standard way to help gather that information. Using
SNMP requires:
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An SNMP agent running on the system to be monitored.
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A Management Information Base (MIB) database on the system to be monitored.
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An SNMP management station running on the same or another system.
A management station is not provided with Equalizer and must be obtained from a third party
supplier. The management station is often used primarily to browse through the MIB tree, and so
is sometimes called a MIB browser. One such management station that is available in a free
personal edition is the
iReasoning MIB Browser , available from www.ireasoning.com .
A MIB database is a hierarchical tree of variables whose values describe the state of the
monitored device. A management station that wants to browse the MIB database on a device
sends a request to the SNMP agent running on the device. The agent queries the MIB database for
the variables requested by the management station, and then sends a reply to the management
station.
SNMP traps are alerts that are tied into the Equalizer Alerts system. They enable an agent to
notify a management station of significant events by way of unsolicited SNMP messages. First,
they must be enabled using the CLI context and then created for each desired alerts. Presently,
Equalizer supports the following SNMP traps:
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Server up/down events - Equalizer will triggers these traps when it detects either a server
failure or a response from a failed server.
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Peer state change events - Equalizer will trigger these traps whenever a state change
occurs to a peer or peer interface..
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Failover Group state change events - Equalizer triggers these traps whenever a state
change occurs to a failover group.
When configuring SNMP traps, an alert type can ONLY be "state change" and the object type can
ONLY be those above. In this context, "state change" is when an object transitions from "UP" to
"DOWN" or vice-versa.
Different OIDs (Object Identifier) are used for each item in the above list. The OID identifies a
variable that can be read via SNMP. So, for example, server up and server down events are sent
using different OIDs. The text message sent with the trap tells you exactly what the event was
(server up or server down).
The SNMP Trap configuration process includes 4 steps:
I. Set up an SNMP Management Station
II. Enable SNMP
III. Enable SNMP Traps
IV. Creating alerts for the desired traps
726 Copyright © 2014 Coyote Point Systems, A Subsidiary of Fortinet, Inc.