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The Line graph depicts the real-time plotting of the SNMP data. Follow the steps below to invoke a line graph.
Specify the proper agent host name or IP address in the Host field of MibBrowser.
Load the MIB file in MibBrowser. To know more on loading MIBs and other features associated with it, refer to the Loading MIBs section.
Specify a valid variable. The variable must be an integer or unsigned integer (Counter, Gauge, Timeticks). This variable can be entered directly in the variable field or it can be chosen by browsing through the MIB tree.
Click the 'View real-time graph' button in the toolbar or select View-->Line Graph from the menu. You can also use the shortcut key combination Alt+L. By default, the line graph is invoked.
Te updated Line graph shows the results of periodically polling the agent for the specified OID.
The image below depicts a Line Graph invoked from MibBrowser.
When you move the cursor over the graph, a box containing the current time and values is displayed. The various options available in the Line graph are tabulated below.
| Option | Description |
|---|---|
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Polling Interval |
This specifies the polling interval time. The default value is 5 secs. You can change the interval time as desired. |
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Average over Interval |
By default, the graph shows the actual values of a variable for different hosts. In other words, the values of the specified OID are plotted for different hosts for the given polling interval. Selecting this option, the average of the values at a given polling interval are taken for plotting the graph. |
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X-axis Scale |
This specifies the X-axis scale. The minimum value is 300 secs and this is the default value. Changing this would alter the X-axis scale of the table. This option is enabled only on clicking 'Show Polled values' option. |
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Show Absolute Time |
By default, the time is depicted in the graphs only as seconds. Selecting this option would give you the time in hours:secs. |
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Max Poll Duration |
This option is used to view all the polled values in a particular time period. It is enabled only on clicking 'Show polled values' option. The default value is 3600 secs. |
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Show Polled Values |
This option is used to display all the polled values in a particular period of time. By default, this option is disabled. Only on selecting this option, the Max Poll Duration option is enabled. |
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Log FileName |
The filename for the log file can be set here. By default, the log filename is graph.txt. If "Log Polled Values" is selected, all the polled values are logged in this file. |
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Log Polled Values |
Selecting this option would log the polled values. This would enable the option Log FileName. |
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Show Absolute Counters |
By default, the graph plots only the difference between the two Counter values. On selecting this, the plotting of the absolute value is performed. |
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Disable Error Dialog |
Selecting this option would stop displaying the error messages that pop up when a request times out. |
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Restart |
The Restart button is used to restart the polling. |
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Stop |
The Stop button is used to stop the polling. |
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Close |
The Close button is used to close the graph window. |
Another way of invoking a graph is through the Table options. For a detailed overview on Table Handling and invoking a graph from the table window, refer to the Table Handling section.
MibBrowser can plot multiple graphs showing values for different variables from different hosts. The image below shows the plotting of multiple graphs and with the option 'Show Absolute Counters' enabled.
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