User's Manual

282 CHAPTER 7: MONITORING THE NETWORK
■ For other devices the hierarchy lists the device as the top-level folder
and the known links to the device as nodes below that.
Selecting the top-level folder, which is the default, changes the displayed
live graphs on the right-hand side of the display to graphs of the monitors
that monitor the general state of the device.Selecting a link node changes
the displayed live graphs on the right-hand side of the display to graphs
of the monitors that monitor the state of the link.
■ When you launch the Live Graphs window for a link, the tree lists the
link as the top-level folder, and the right-hand side of the display
shows live graphs for all of the link’s monitors.
Live Graphs Display The live graphs display area, on the right-hand side, shows live graphs for
the states of the monitors relevant to the item selected in the tree.Each
monitor’s entry shows the name of the monitor that the graph is for and
the graph itself:
Figure 126 Live Graph Display
The graph displays the historical state of the monitor. For example, for the
IP Ping Service monitor, the graph displays a history of the IP ping
response time for the device.
A history for each monitor is maintained, by default, for ten minutes. This
stored data allows you to instantly see the most recent ten minutes of
activity on any monitor, at any time. This may be useful in helping to
determine the network activity immediately preceding a current network
problem.
If you launch the Live Graphs window within 10 minutes of starting
monitoring against a device or link, you will only see data for the time
that the device or link has been monitored. When you stop monitoring
against a device or link, 3Com Network Director will discard all
maintained data against the device or link.