NeDi is a tool that discovers and documents your network extremly efficient. Starting from some seed devices it sends requests only to devices its knows to exist. So it does not waste time with scanning large networks causing unwanted noise. Visiting every device (Routers, Switches) in the network it retrievies information about their neighbourhood and interesting status data. So after crawling through the networks NeDi does not only know about all connections between your devices, about all hosts connected to your net, about all models, sofware versions and serial numbers of the devices in your network, but also about the traffic statistics of all your interfaces. In my talk I want to discuss the way how NeDi operates, how to set it up and keep it running. I present the information that NeDi provides and how to use it keep your network running. This presentation will a talk only without a demonstration of the software. No participation of the audience is needed.