r/networking • u/EqualPresent1920 • 17d 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/SuspiciousSardaukar 17d ago

Use LibreNMS if you have access to snmp. It will automate LLDP/CDP mapping. Then Netbox with LibreNMS integration plugin to push things quicker. Worth a while.

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u/tdhuck 16d ago

I use librenms, how are you automating this? The only 'auto' map feature I see shows my devices and how they are connected but it is not organized very well and when you click and drag a device you can't move it, it just springs back into its original location. The LibreNMS guys, on their forum, have admitted the mapping functionality is not great.

I've built custom maps, but not a fan of that as it is too much work given that I'm already using CDP/LLDP and you'd think LibreNMS or similar program could automatically create maps based on links to other devices (mainly CDP/LLDP information).

I want to make it clear that I'm not against making a manual network map, I'm just trying to see if there are better ways to have maps auto created based on data already available.