Power Supply Configuration Guidelines - Cisco AP775A - Nexus Converged Network Switch 5010 Configuration Manual

Chapter 18 Managing System Hardware
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
Figure 18-4
Configure the power attributes for the power supply.
Step 3
Click Apply in Device Manager or click the Apply Changes icon in Fabric Manager.
Step 4
See the
Note
configuration.

Power Supply Configuration Guidelines

Follow these guidelines when configuring power supplies:
1.
Table 18-1
Scenario
1
OL-17256-03, Cisco MDS NX-OS Release 4.x
Power Supply Information in Device Manager
"Displaying Power Usage Information" section on page 18-3
When power supplies with different capacities are installed in the switch, the total power available
differs based on the configured mode, either redundant or combined:
Redundant mode—The total power is the lesser of the two power supply capacities.
a.
For example, suppose you have the following usage figures configured:
Power supply 1 = 2500 W
Additional power supply 2 = not used
Current usage = 2000 W
Current capacity = 2500 W
Then the following three scenarios will differ as specified (see
Scenario 1: If 1800 W is added as power supply 2, then power supply 2 is shut down.
Reason: 1800 W is less than the usage of 2000 W.
Scenario 2: If 2200 W is added as power supply 2, then the current capacity decreases to 2200
W.
Reason: 2200 W is the lesser of the two power supplies.
Scenario 3: If 3000 W is added as power supply 2, then the current capacity value remains at
2500 W.
Reason: 2500 W is the lesser of the two power supplies.
Redundant Mode Power Supply Scenarios
Power Current
Supply 1 Usage
1
(W) (W)
2500 2000
Insertion of New
Power Capacity
Supply 2 (W) (W)
1800 2500
Cisco MDS 9000 Family Fabric Manager Configuration Guide
Power Supply Configuration Modes
to view the current power supply
Table 18-1):
Action Taken by Switch
Power supply 2 is shut down.
18-5