[skuhn]

Sorry for any confusion with the fiber optic cabling; that connects to the uplinks on our production top of rack switches. The copper cabling is used to uplink our management switches and for serial consoles on the switches and CDUs.

The excess unlit fiber capacity lets us install more switches or bring up more uplink ports for a particular rack, as necessary.

One thing that we had to cut for length is how our cabinets are built: we work closely with our systems integrator on a few rack designs that we re-use often, and they build, test and cable (with cat6) every server in the rack according to that design. Once a rack rolls onto the datacenter floor, we bolt it down, connect ground and power leads, and run short patch cables from the switch uplinks to the patch panels suspended from the ladder rack above each cabinet position.