In one embodiment, a computer system has a plurality of chassis interconnected by cables. Each cable initially connects a unique port pair consisting of a port of one chassis and a port of another chassis. The disconnection of cables is monitored, including electronically recording a disconnection sequence in which the port pairs are disconnected by removing each cable from at least one port of the respective port pair. Visual guidance is provided for re-cabling the computer system by sequentially identifying the port pairs in a reversal of the disconnection sequence, wherein identifying each port pair includes illuminating visual indicators associated with the ports of each port pair with a matching illumination pattern.