System information

364 Observer Suite: SNMP Management
• Page phone number
• Play sound file
• Execute command line
• Add to event log
These actions can be configured independently. It is possible to configure any, all, or
none of these to be executed when a threshold is reached.
• “Email message” textbox—allows you to enter an email message to be sent.
Chart Items Tab
When agent information is displayed in chart format, several options are available for
customizing the display. To define the settings, right-click on the Chart and select
P
ROPERTIES. The Chart Properties dialog will be displayed. See “Chart Properties –
Chart Items Tab” on page 346.
Chart Properties Tab
See “Chart Properties – Chart Properties Tab” on page 346.
Building Expressions
Expressions permit you to take SNMP agent data and derive useful mathematical results.
Raw data that SNMP Management Console receives from SNMP agents can be very
useful but, often it’s only the starting point. An SNMP agent on a switch may keep track of
the number of data packets the switch has received, the number of packets it has
discarded, and the number of packets it has passed along. However, the network
administrator may be more interested in the percentage of packets discarded since this
may signal a problem with the system.
Expressions are indicated in the MIB Editor by the icon.
1. To create a new expression, from the MIB Editor, click on Expressions, then select
Mode Commands > New Expression or right-click and select NEW EXPRESSION)
2. From the left pane of the MIB Editor, select any MIB objects that you intend to use in
the expression and drag-and-drop them on the new expression.
There may be a slight performance penalty caused by including unnecessary
MIB objects in an expression. In terms of system efficiency, it’s best to add
only those you need. If you find you need additional MIB objects to create
your expression, you can easily add them at a later time by the same drag-
and-drop method.
New
Expression