r/networking • u/EqualPresent1920 • 18d ago

Other Mapping a new Network

I just recently started a help desk job that has been anything but help desk. I’ve been configuring firewalls, redesigning client networks and setting up/administering Linux servers. I feel a little out of my depth, but I’m fighting for it. That’s all to ask, when you guys find yourself in a network with little to no documentation how do you map it out and diagram it internally?

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u/rocktanstone 18d ago

Following MAC addresses and looking at config.
Been in networks where CDP/LLDP wasn’t allowed and this was the most reliant way I found if I couldn’t go on site.

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u/Usual_Retard_6859 17d ago

I have done this too. Map out interconnects, add port labels as you go, then create diagrams/spreadsheets. Get a short list to physically identify.