NAV has a number of background processes that monitors the operational status of the network:

• The status monitor monitors basic (and fundamentally important) reachability. Are the devices alive? Since NAV has knowledge of topology, NAV can pinpoint root cause in the case of a larger breakdown. This is done by distinguishing between a device being down or a device being in shadow of a more central device that is down.
• The service monitor monitors services. A number of services are supported (ssh, http, ssl, imap, pop3, smtp, dns, rpc, samba, dc and more).
• The module monitor monitors the operations of modules within a switch stack or within a chassis.
• The threshold monitors the RRD data and send alarms if a threshold on a given value is exceeded.

The status tool gives an overview of all the active alarms. The display is divided into several sections, this is per-user configurable using the preferences tool from the tool bar. The default sections include:

• IP devices down
• IP devices in shadow (shadow means that the device is behind a device that is down and the status is thus unknown)
• Modules down
• Services down

In addition using the preferences tool (reached from the NAV bar) you may add:

• Thresholds exceeded
• IP devices on maintenance
• Services on maintenance

For each section the NAV user may also choose to filter out certain alarms based on either organization, category (GW/GSW/SW/SRV etc) or state (up/down/shadow).

From each status page section a link to history is provided. You may also see individual histories using the link provided on each line in the listing. The history view goes per default 7 days back, but can be increased to a maximum of 30 days.

For the services section you may in addition go to a matrix view that shows red and green lights for all monitored services.

For the webfront - none. But the data the status page uses is supplied from backend processes such as pping, servicemon, etc. They have config files that can alter their behavior, for details see backendprocesses.