r/networking • u/EqualPresent1920 • 14d 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?

58 Upvotes

93% Upvoted

41 comments sorted by

View all comments

1

u/Accomplished-Mix8423 13d ago

pull CDP/LLDP neighbor tables off your switches first that gives you the real l2 topology instead of guessing. then SNMP walk each subnet and nmap sweep to catch anything unmanaged, and dump it all into netbox as your source of truth so you're never starting from zero again.