Power Supply Configuration Modes - Cisco Nexus 7000 Series Hardware Installation And Reference Manual

Power Supply Configuration Modes

Component
24-port 40-Gigabit Ethernet I/O modules with XL
option(N7K-M324FQ-25L)
Fabric Modules
Fabric-1 module (N7K-C7018-FAB-1)
Fabric-2 module (N7K-C7018-FAB-2)
Fan Trays (N7K-C7018-FAN)
All fan trays (total)
Power Supply Configuration Modes
You can configure one of the following power modes to either use the combined power provided by the
installed power supplies or to provide power redundancy when there is a power loss:
• Combined mode—Provides the maximum amount of available power by utilizing the combined power
• Power-supply redundancy mode—Allows you to replace a power supply during switch operations. All
• Input source redundancy mode—Takes power from two electrical grids so that if one grid goes down,
• Full redundancy mode—Provides both power-supply redundancy and input-source redundancy. This
The amount of power available for use with your Cisco Nexus 7000 Series switch depends on the number of
power supplies, input voltage used, and the power mode used. To determine the amount of available power
for the power supplies, see the following tables:
• For the 3-kW AC power supplies, see
• For the 6-kW AC power supplies, see
• For the 7.5-kW AC power supplies, see
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output from all installed power supplies for switch operations. This mode does not provide redundancy.
power supplies are active. The available power is calculated as the least amount of power available from
all but one of the power supplies (N+1). The reserve power is the amount of power output by the power
supply that can output the most power. For example, if three power supplies output 3 kW, 6 kW, and 6
kW, the available power is 9 kW (3 kW + 6 kW) and the reserve power is 6 kW.
the other grid can provide the power needed by the switch. For the Cisco Nexus 7004 chassis, each grid
powers half of the power supplies. For the Cisco Nexus 7009, 7010, and 7018 chassis, each grid powers
half of each power supply (grid A is connected to the Input 1 receptacle on each power supply and grid
B is connected to the Input 2 receptacle on each power supply). The available power is the amount of
power output by the portions of the power supplies that are connected to the same grid. For example, if
three power supplies are connected to a 110-V grid and a 220-V grid, each power supply outputs 1.2 kW
for the 110-V grid and 3.0 kW for the 220-V grid. The available power would be 3.6 kW (1.2 kW + 1.2
kW + 1.2 kW) and the reserve power would be 9.0 kW (3.0 kW + 3.0 kW + 3.0 kW).
mode allows you to replace a power supply without interrupting switch operations or continue powering
the switch if one of two grids goes down. The available power is the lesser amount of output power for
power supply redundancy or input source redundancy.
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Quantity Maximum
750 W
3 to 5 (same type) —
100 W
150 W
2 —
1000 W
Table 19: Power Availability for 3-kW AC Power Supplies , on
Table 21: Power Availability for 6-kW AC Power Supply Units ,
Table 22: Power Availability for 7.5-kW AC Power Supplies,
Technical Specifications
Typical
600 W
—
90 W
110 W
—
569 W