Power Modes Overview; Guidelines For Configuring Power Redundancy Modes - Cisco Nexus 7702 Hardware Installation Manual

Power Modes Overview

Before You Begin
Verify that either the I/O slot is empty or the I/O module installed in the slot is powered down.
Clear the running configuration by using the purge module slot_number running-config command.
Example:
switch# purge module 1 running-config
Power Modes Overview
You can configure one of the following power modes to either use the combined power provided by the
installed power supply units (no power redundancy) or to provide power redundancy when there is a power
loss:
Combined mode
Power-supply (n+1) redundancy mode
Input-source (grid) redundancy mode
Full redundancy mode

Guidelines for Configuring Power Redundancy Modes

The amounts of available and reserve power depend on the power redundancy mode that you specify and the
number of power supplies installed in the switch. For each redundancy mode, consider the following:
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This mode allocates the combined power of all power supplies to active power for switch operations.
This mode does not allocate reserve power for power redundancy in case of power outages or power
supply failures.
This mode allocates one power supply as a reserve power supply in case an available power supply
fails. The remaining power supplies are allocated for available power. The reserve power supply must
be at least as powerful as each power supply used for the available power.
This mode allocates half of the power to available power and the other half to reserve power. You must
use a different power source for the active and reserve power sources so that if the power source used
for active power fails, the other power source used for the reserve power can provide power for the
switch.
This mode provides both power-supply (n+1) and input-source (grid) redundancies. As happens with
the input-source redundancy mode, this mode allocates half of the power supplies to provide available
power and the other half of the power supplies to provide the reserve power. One of the reserve power
supplies can alternatively be used to provide power if a power supply supplying the available power
fails.
Managing the Switch