It’s keeping the drawings / spreadsheets / etc. up to date, to know what changes are required, that I’m thinking about.

With multiple switches, VLANs, subnets, etc and I want to add an IoT device somewhere physically convenient, then maybe I now need to trunk the IoT VLAN through multiple devices from the Wifi AP PoE switch, update firewall rules, because this is the 1st device on that physical segment, etc… and then update the drawings afterwards.

Now that’s worth automating.

I’m looking for a map, not a calculator.