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Her you can find a number of documents that give you necessary information on how to configure and use NAV.
Essential information to get you started using NAV:
The home page is where you start. The home page gives an overview of status and links to other tools.
The status tool gives an overview on operations; i.e. that all the network components and services are up and running.
Network explorer displays the network resources in tree structured manner. You can drill down for details or use the search utility to locate what you are interested in.
The traffic map gives a graphical view of the network. Min/Max/Average load in a timeframe, or the current load.
The report tool is a highly customizable report generator that displays information from the NAV database. The report tool also links to the IP device center and to the IP address scope matrix view.
NAV uses Cricket to collect statistical data such as interface counters, CPU load, memory usage and more. The statistics tool also has a sorted statistics feature that displays tabular reports on the interface with heaviest load, the router with highest CPU usage and so forth.
The machine tracker lets you find IP or MAC adresses that are or have been in operation. Mac addresses are tracked down to their connected switch port.
Layer 2 trace gives you the layer 2 trace of a machine to its default router. Alternatively the tool can give you the complete layer 2 trce between two machines.
The syslog analyzer lets you browse Cisco syslog messages that are collected by the syslog deamon.
Arnold is a switchport blocking tool. Use it to manually block switch ports or use the backend feature and run automated blocking raids.
Edit Database is the tool for seeding you NAV database with essential informations.
The messages tool is where you can publish operational messages. The messages will be visable on the home page of NAV.
AlertProfiles is where you set up your personal alert profiles; i.e. which alerts you would like to receive as email or sms.
Maintenance tasks is where you create and edit equipment maintenance schedules. Equipment on maintenance does not cause alerts when down or unavailable.