Determining Criteria for RLUs
Before discussing how RLUs are determined and used, we should examine the six criteria used in the determinations. These are power, cooling, physical space, network connectivity, rack weight, and logical capacity. The following figure shows in-feeds from power, HVAC, and network connectivity. It also shows that the other three criteria, physical space, weight specifications, and functional capacity, are aspects of the rack. Keep in mind that the specifications for these criteria should be listed for the rack or the rack's individual devices. If they are not on hand, you should get them from the equipment manufacturers.
Figure 4-2. RLU Criteria
Power
The amount of power, number of breakers, and how the center is wired ...
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