|
|
|
|
|
|
|
Chapter 7: Monitoring Events
WhatsUp Gold can alert you in two different ways.
- Interval Polling - Network services (HTTP, FTP, etc.) and devices are queried on a timed interval to check their state. These types of services and devices operate in a mode where they can respond to their status whenever it is requested. If a service or device does not respond to a request from WhatsUp Gold, then the service/device is considered DOWN.
- Asynchronous Events - Some elements on a network may not provide a clear UP or DOWN status when queried. For example, a message may get logged to the system's Event log by another application (such as an Anti-Virus application alerting when a virus is found). Since these messages/events can occur at any time, an Event Server will "Listen" for them, and notify WhatsUp Gold when they occur
Other examples of asynchronous events include:
- SNMP Traps - Routers and other network devices generate traps when events occur on the network. The SNMP trap server receives and logs these traps, but WhatsUp Gold can trigger Alerts or change device states when specific traps are received.
- Syslog Messages - Many software applications can send log messages to a central Syslog logging service. Once again these messages are sent at the convenience of the sending application, which requires a listening mechanism (provided by the WhatsUp Syslog).
In general, there are four steps to using events.
- Configure your event server. For information on this, see "Configuring the Event Servers".
- Create the event so that it resides in the Events Library and is available for use.
- Associate the event to a device so the event can be logged when the device raises the event.
- Associate the event to an alert (on the device) so that when an event occurs on that device, you can respond to it.
Note: With events, we added another notification variable %(*). For more information on this, see "The Event Notification Variable %(*)".
For Windows Log Events, WhatsUp Gold only logs events that are configured and are active on devices. That is, only if a device is "listening" for an event, will any logging occur. Conversely, with SNMP Traps and Syslog events, any event which arrives is logged to the SNMP Log and WhatsUp Gold Syslog respectively. If no events are configured on that device it will be logged as "Unsolicited" in the Activity Log if "Filter Unsolicited Events" is not selected.
 Ipswitch, Inc. http://www.ipswitch.com |
|
|
|
|
|
| ©Ipswitch 2003 | |||