Chapter 2 Installing the Cisco MDS 9216 Switch
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•Consider heat dissipation when sizing the
•Ensure the site power meets the power requirements listed in Appendix B, “Technical Specifications”. If available, you can use an uninterruptible power supply (UPS) to protect against power failures.
Caution Avoid UPS types that use ferroresonant technology. These UPS types can become unstable with systems like the Cisco MDS 9000 Family, which can have substantial current draw fluctuations because of fluctuating data traffic patterns.
•Ensure that circuits are sized according to local and national codes. For North America, the 845 Watt power supply requires a 15A or 20A circuit.
If you are using a 200/240 VAC power source in North America, the circuit must be protected by a
Caution To prevent loss of input power, ensure the total maximum loads on the circuits supplying power to the switch are within the current ratings for the wiring and breakers.
•If mounting the chassis in a rack or cabinet, ensure the rack or cabinet meets the following requirements:
–Standard 19” EIA rack or cabinet, with mounting rails that conform to English universal hole spacing per section 1 of
–Width between two front mounting rails: minimum of 17.75 inches (45.1 cm)
–Depth between front and rear mounting rails: minimum of 23.5 inches (59.7 cm)
–Minimum vertical rack space per chassis: 3 rack units (RU), equal to 5.25 inches (13.3 cm)
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