This puts the focus in the wrong place.<p>When wiring a rack, you've got to start with an understanding of what you want each piece to do. If you have a switch where all the ports are untagged or on a common VLAN, the only thing which matters about cable placement in the switch is how easy it is to trace later on. If you have multiple VLANs, you need to have a map right there in front of you saying how the ports are assigned.<p>On the physical level, dealing with intermittent connectivity issues (cable not plugged in properly, cable damaged by mechanical stress) and difficulty extracting cables (RJ45 lock lever too small or stuck) are relatively common issues that won't be adequately simulated in VR anytime soon.