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3-3
Cisco Nexus 7000 System Site Preparation Guide
OL-15846-01
Chapter 3 Technical Specifications
Power Specifications for the Nexus 7010 System
Power Requirements
To determine the power requirements of the Nexus 7000 System, add the power requirements of each of
its components.
The quantity of each type of module in your system depends on how you configure your system. You
can configure your system according to the following minimum and maximum guidelines:
• (Minimum) 1 supervisor module, 1 I/O module, 3 fabric modules, 2 power supplies
• (Maximum) 2 supervisor modules, 8 I/O modules, 5 fabric modules, 3 power supplies
Table 3-4 lists the power requirements for each type of module that can be included with the the Nexus
7010 system.
Power Supply Configuration Modes
You can configure one of the following power modes to eith er utilize all of the availab le power p rovided
by the installed power supplies or to provide power redundancy when there is a power loss:
• Combined mode—This mode provides the maximum amount of available power by utilizing the
combined power output from all installed power supplies for system operations. This mode does not
provide a redundancy.
• Power-supply redundancy mode—This mode lets you replace a power su pply dur ing syste m
operations. All power supplies are active but the available power is calculated as the least amount
of power available from all but one of the power suppli es (N+1) and 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 3.0 kW, 6.0 kW, and 6.0 kW, the available power is 9.0 kW (3.0 kW + 6.0 kW) and
the reserve power is 6.0 kW.
• Input source redundancy mode—This mode takes power from two electrical grids so that if one grid
goes down, the other grid can provide the power needed by the system. Each grid powers half of
each power supply (grid A is connected to the Input 1 rece ptac le on eac h p ower su pply an d g rid B
is connected to the Input 2 receptacle on each pow er suppl y) . Th e av ai la ble powe r is c a lcul at ed a s
the amount of power output by the portions of power supplies conn ec ted t o the sa me gri d. Fo r
example, if three power supplies are connected to a 110V grid and a 220V grid, each power supply
outputs 1.2 kW for the 110V grid and 3.0 kW for the 220V 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).
Tab l e 3-4 Power requirements for the Nexus 7010 system
Component Maximum Typical
Supervisor module 200 watts 190 watts
48-port I/O module 400 watts 358 watts
32-port I/O module 750 watts 611 watts
Fabric module 60 watts 55 watts
All fan trays (total) 2184 wa tts 300 watts
Power supply 300 watts 200 watts