Graphing SNMP Values (Overview)

Some of the SNMP objects are best monitored by displaying their changing values in a graph. Ipswitch WhatsUp Gold v11's SNMP Graphing Utility lets you select one or more SNMP objects and show a real-time graph of their values. You can also graph the sum or difference of two or more SNMP objects. You can save a graph to a file and later open the file and resume graphing the SNMP objects.

To use the SNMP Graphing Utility:

From the main menu, select Tools > SNMP Graph Utility.
The Graphing Utility starts the default graph file, GRAPH.wgg. This graph contains one graph object (timer) that shows the time elapsed between the reported SNMP values. You can change the timer properties.
From the Edit menu, select Add Item > SNMP Item. In the Graph Item Properties dialog box, click the Browse button to the right of the Item box, then select an SNMP object from the MIB tree.

By default, the Utility graphs the change between each reported value of the SNMP object. You can set the utility to graph only the reported values for an object in Edit > Item Properties > Absolute values.

The graph window shows a line graph for each SNMP object added to the graph. Up to 20 SNMP objects can be active on the graph. You can set the color and line width to distinguish each graphed object.

To edit a graph item's properties:

To select the item to edit, do one of the following:
- In the graph legend, double click the item you want to modify.
- In the graph legend, click the item you want to modify, then from the Edit menu select Item Properties.
Make any changes to the Graph Item Properties, then click OK to save them and close the dialog box.

To graph the sum or difference of two or more SNMP objects:

From the Edit menu, select Add Item > Accumulator.
Enter the Graph Accumulator Properties and click OK to save them and close the dialog box.

To view the values that are being graphed:

In the graph legend, right-click the item, then select View Values from the right mouse menu.