Avaya G250 Administration page 204

Configuring SNMP
There are many SNMP management applications, but all these applications perform the same
basic task. They allow SNMP managers to communicate with agents to configure, get statistics
and information, and receive alerts from network devices. You can use any SNMP-compatible
network management system to monitor and control a G250/G350.
There are several ways that the SNMP manager and the agent communicate. The manager
can:
Retrieve a value – a get action.
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The SNMP manager requests information from the agent, such as the number of users
logged on to the agent device or the status of a critical process on that device. The agent
gets the value of the requested Management Information Base (MIB) variable and sends
the value back to the manager.
Retrieve the value immediately after the variable you name — a get-next action.
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The SNMP manager retrieves different instances of MIB variables. The SNMP manager
takes the variable you name and then uses a sequential search to find the desired
variable.
Retrieve a number of values — a get-bulk action.
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The get-bulk operation retrieves the specified number of instances of the requested MIB
variable. This minimizes the number of protocol exchanges required to retrieve a large
amount of data.
Note:
Get-bulk is not supported in SNMPv1.
Note:
Change a configuration on the agent — a set action.
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The SNMP manager requests the agent to change the value of the MIB variable. For
example, you can run a script or an application on a remote device with a set action.
An agent can send an unsolicited message to the manager at any time if a significant,
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predetermined event takes place on the agent. This message is called a notification.
When a notification condition occurs, the SNMP agent sends an SNMP notification to the
device specified as the trap receiver or trap host. The SNMP Administrator configures the
trap host, usually the SNMP management station, to perform the action needed when a
trap is detected.
Note:
For a list of traps and MIBS, see
Note:
204 Administration for the Avaya G250 and Avaya G350 Media Gateways
Traps and MIBs on page 533.