Overview Of Power Modes - Cisco Nexus 9504 Hardware Installation Manual

Managing the Switch
Quantity of Fabric Modules Installed
4
5
6

Overview of Power Modes

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 for when there is a power
loss:
Combined mode
Power-supply (n+1) redundancy mode
Input-source (grid n+n ) redundancy mode
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.
For example, if a switch requires 2.0 kW of available power and the switch has two power supplies
that each output 3 kW, then one of the power supplies provides 3.0 kW of available power and one
power supply provides 3.0 kW of reserve power in case the other power supply fails.
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.
For example, if the switch requires 4.0 kW of power, the switch has four power supplies that each
output 3 kW. If you have two power grids, you use grid A to power two 3-kW power supplies that
provide the available power for the switch and you use grid B to power the other two 3-kW power
supplies that provide the reserve power in case grid A fails.
Slots filled with fabric modules
22, 23, 24, and 26 (labeled as FM 2, FM 3, FM 4, and FM6)
21, 22, 23, 24, and 26 (labeled as FM 1, FM 2, FM 3, FM 4, and
FM 6)
or
22, 23, 24, 25, and 26 (labeled as FM 2, FM 3, FM 4. FM 5, and
FM 6)
21, 22, 23, 24, 25, and 26 (labeled as FM 1, FM 2, FM 3, FM 4,
FM 5, and FM 6)
Cisco Nexus 9504 NX-OS Mode Switch Hardware Installation Guide

Overview of Power Modes

53