Introducing the SNMP Agent

The 171 CBU 98090 and 171 CBU 98091 processors include an SNMP v1 agent. An SNMP agent is a software component that allows access to the processor diagnostic and management information via the SNMP service.

SNMP browsers, network management software, and other tools typically use SNMP to access this data. In addition, the SNMP agent can be configured with the IP address of up to 2 devices–typically PCs running network management software–to be the target of event driven trap messages. These trap messages inform the management device of events such as cold start, and detected authentication failures.

Use the SNMP tab to configure the SNMP agent in the processor. The SNMP agent can connect to and communicate with up to 2 SNMP managers as part of an SNMP service. The SNMP service includes:

  • authentication checking, by the processor, of any SNMP manager that sends SNMP requests

  • management of event, or trap, reporting by the processor

SNMP Tab

The following procedure shows how to access the SNMP tab:

Step

Action

1

In the Project Browser, navigate to the Communication > Networks subdirectory.

2

Double-click the appropriate Ethernet network to open its configuration dialog.

3

Select the SNMP tab to open the SNMP configuration screen:

4

Enter the parameter settings for the SNMP configuration. Refer to the Configuring SNMP Properties section, below, for a description of SNMP settings.

Configuring SNMP Properties

The processor includes the following SNMP properties:

Property

Description

IP address managers:

IP address manager 1

The IP address of the first SNMP manager to which the SNMP agent sends notices of traps.

IP address manager 2

The IP address of the second SNMP manager to which the SNMP agent sends notices of traps.

Agent:

Location

The device location (32 characters maximum)

Contact

Information describing the person to contact for device maintenance (32 characters maximum).

SNMP manager

When this checkbox is:

  • selected: The location and contact information are editable in this page.

  • de-selected: Location and contact settings are not editable in this page.

Default = de-selected.

Community names:

Get

Password required by the SNMP agent before executing read commands from an SNMP manager. Default = public.

Set

Password required by the SNMP agent before executing write commands from an SNMP manager. Default = public

Trap

Password an SNMP manager requires from the SNMP agent before the manager will accept trap notices from the agent. Default = public

NOTE:

  • Traps are sent via UDP port 161.

  • You may need to configure trap settings on the SNMP manager, consistent with trap settings on the processor.

Security:

Enable “Authentication Failure” trap

If an unauthorized manager sends a Get or Set command to the SNMP agent, the agent sends a trap notification message to the manager. Default = de-selected.