Power Management Modes For The Catalyst 4500 Switch - Cisco Catalyst 4500 Series Software Configuration Manual

Chapter 14 Environmental Monitoring and Power Management
When you insert power supplies in your switch, use power supplies that are of the same wattage.
Multi-input power supplies such as 1400 W DC triple-input, 4200 W AC, 6000 W AC, and 9000W AC
have additional restrictions. Read the sections on special considerations for these power supplies. If
you mix power supplies, the switch uses the one with the higher wattage and ignores the other power
supply. The power supply status displays as err-disable and the summary displays as all zeros (0) for
wattage values in the output for the show power command.
The following example shows the output for the show power command for mixed power supplies:
Switch# show power
Power
Supply
------
PS1
PS2
*** Power Supplies of different type have been detected***
Power supplies needed by system
Power supplies currently available :1
Power Summary
(in Watts)
----------------------
System Power (12V)
Inline Power (-50V)
Backplane Power (3.3V)
----------------------
Total Used
Switch#

Power Management Modes for the Catalyst 4500 Switch

The Catalyst 4500 series switches support two power management modes:
•
•
Note
Note
Model No Type
---------------- ---------
PWR-C45-2800AC AC 2800W
PWR-C45-1000AC AC 1000W
Used
----
328
----
338 (not to exceed Total Maximum Available = 750)
Redundant mode—Redundant mode uses one power supply as a primary power supply and the
second power supply as a back-up. If the primary power supply fails, the second power supply
immediately supports the switch without any disruption in the network. Both power supplies must
be the same wattage. A single power supply must have enough power to support the switch
configuration.
Combined mode—Combined mode uses the power from all installed power supplies to support the
switch configuration power requirements. However, combined mode has no power redundancy. If a
power supply fails, one or more modules might shut down.
On the Catalyst 4510R switch, the 1000 W AC power supply is not enough to support redundant
mode for all possible configurations. It is able to support redundant mode for limited
configurations that require less than 1050 W.
The 1400 W DC power supply supports combined mode for data power. It does not support
combined mode for PoE power.
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Status
-----------
good
err-disable
:1
Maximum
Available
---------
1360
0 1400
10 40
Fan Inline
Sensor Status
------ ------
good good
good n.a.
Power Management
14-9