294CHAPTER 7: MONITORING THE NETWORK

Stopping monitoring on a set of devices and links can be performed in a similar manner to starting monitoring, but by selecting either Monitoring

>Stop Monitoring from the main menu or Stop Monitoring from the right-click menu instead.

When you stop monitoring for a device or link, 3Com Network Director clears the stored history for that item’s monitors and automatically resolves any unresolved events for that item that were generated by active monitors.Unresolved events for the device that were generated by SNMP traps or passive monitors remain unresolved.If you have the Live Graphs window or Detailed Graph dialog box open for the item then these will be automatically closed.

When you stop monitoring for a 3Com device 3Com Network Director also de-registers itself as an SNMP trap destination if it was previously registered.

3Com Network Director will never generate events for a device or link that is not being monitored.

Disabling and Enabling Individual Monitors

Each monitor provides details of the state of a particular attribute of a device or link.If a particular attribute is of no interest to you, but you still wish to monitor other attributes on a device or link, then you may disable the monitor for that attribute in order to reduce the amount of network traffic generated by 3Com Network Director

Individual monitors can be disabled from the Live Graphs window by selecting the monitor and then selecting either Monitor > Disable this monitor from the main menu or Disable this monitor from the right-click menu.You may also disable a monitor by clicking the Disable this monitor button in the More Detail dialog box.

Similarly, a disabled monitor can be re-enabled from the Live Graphs window by selecting the monitor and then selecting either Monitor > Enable this monitor from the main menu or Enable this monitor from the right-click menu. Monitors cannot be re-enabled from the More Detail dialog box.

When you disable a monitor, all events that rely upon that monitor are automatically disabled. Similarly, when you enable a monitor, all events that rely upon that monitor are automatically enabled. See “Disabling and Enabling Events” on page 349.