The available power is 6.0 kW (output from two 3-kW power supplies on grid A) and the reserve
power is 6.0 kW (output from the other two power supplies on grid B). The available power (6.0
kW) exceeds the power requirement of the switch (5.2 kW), so the entire switch can power up.
The following table shows the results for each scenario.
Result
Reserve
Power
Available
Power
Output for Power Supplies
Power
Requirement
Scenario
4
3
2
1
Available
power
(3.0 kW)
is less
than the
power
requirement
for the
switch
(5.2
kW)—switch
powers up
but some
of the line
cards
cannot
power up.
3.0 kW
3.0 kW
—
—
3.0 kW
3.0 kW
5.2 kW
1
Available
power
(6.0 kW)
exceeds
the power
requirement
for the
switch
(5.2
kW)—entire
switch
powers
up.
6.0 kW
6.0 kW
3.0 kW
3.0 kW
3.0 kW
3.0 kW
5.2 kW
2
For grid redundancy mode, the power supplies must be divided into two equal sets and installed as
follows:
• Slots PS 1 to PS 5 must be connected to one grid (Grid A)
• Slots PS 6 to PS 10 must be connected to another grid (Grid B)
Setting the Power Mode
You can configure the power supply mode by using the
power redundancy-mode
command.
Cisco Nexus 9516 NX-OS Mode Switch Hardware Installation Guide
57
Managing the Switch
Setting the Power Mode