Juniper QFX10016, Hardware Manual

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your switch will be less than the calculated results shown here and will vary based on the
hardware and software configuration of your switch, the amount of traffic passing through the
line cards, and environmental variables such as room temperature.
Before you begin these calculations:
• Ensure you understand the different switch configurations. See "QFX10016 Components and
Configurations" on page 18 .
• Ensure that you know the power requirements of different switch components. See "Power
Requirements for QFX10000 Components" on page 170 .
This topic describes these tasks:
How to Calculate the Power Consumption of Your QFX10016
Use the following procedure to determine the maximum power you need to supply to the switch. To
calculate system power consumption, you first determine the combined internal power requirements of
all the switch components and then divide this result by the power supply output power.
To calculate maximum system power consumption:
1. Determine the maximum power consumption of the base chassis components (that is, the
components other than the line cards). Use Table 2 if your switch is configured as either the standard
base, or redundant configuration.
Table 65: Chassis Power Consumption for Standard Configurations
Chassis Component Base Configuration Redundant Configuration
QFX10016-FAN (Fan tray) 1950 W 1950 W
QFX10000-RE (Routing and Control Board) 125 W 250 W
QFX10016-SF (SIB) 3375 W 4050 W
Total 5450 W 6250 W
2. Calculate the maximum internal power consumption of the entire switch by adding in the power
requirements of each line card. See Table 3 for a chart of the power needed for line cards.
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