"The ISP of one of my clients, for example, wants me to detail the name of each computer that will be attached to a given IPv6 address and what's used for. I just stare at the spreadsheet like a deer in headlights unsure where to even begin with something like that. I'm not sure that drawing a penis in the spreadsheet cells and sending it backed labelled "my answer makes as much sense as your question" is going to get me what I need."
Just enter "The router YOU supplied me, you wonks!" and send the sheet back.
Anything behind the router is NONE of their business.