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2. Calculate the maximum internal power consumption of the entire router by adding in the power
requirements of each line card. See
Table 32: Line Card Power Consumption
Number of Line Cards
1
2
3
4
For example, for a PTX10004 with three PTX10K-LC1201-36CD line cards, the maximum power
consumption is:
= 3 (power consumed by PTX10K-LC1201-36CD in watts)
= 3 (1775 W)
= 5325 W
3. Add the power consumption from Step
To continue from the previous example, add the wattage from two PTX10K-LC1201-36CD line cards
to a PREM2 configuration.
(5325 W) + (3000 W)
= 8325 W required
How to Calculate the Number of Power Supplies Required for Your PTX10004 Configuration
The minimum power configuration for PTX10004 routers is three power supplies. However, using the
calculated minimum power configuration doesn't prevent the system from raising a power alarm. To ensure
you don't log power alarms with a fully loaded chassis, you must configure your router for dual feed and
high-power settings.
To calculate the number of power supplies required for your minimum router configuration:
1. Determine the power available from the power supplies. The power supplies have s a set of three DIP
switches on the faceplate that allows you to configure the power supply for either the high power (30
Table 32 on page 92
for a chart of the power needed for line cards.
PTX10K-LC1201-36CD
1775 W
3550 W
5325 W
7100 W
1
and the total line card consumption from Step 2.
92
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