Incpetion in IT

I have to remember where I am conceptually!
I was installing a RADIUS client on a cisco wireless router that was 3 layers deep in switching. It made my head spin for about 30 minutes as to why i didnt have connectivity…

layer 1- RADUIS server (internal.subnet#1.7)
layer 2- L2L VPN over the cloud (public.ip.x)
layer 3- local ASA (internal.subnet#2.ip.3)
layer 4- local wireless router (internal.subnet#3.ip.1)

getting the concept in my head to configure all that… works great when I remember to kick myself out of the deep dream world of IP addresses.