Available Power For Catalyst 4500 Series Switches Power Supplies - Cisco Catalyst 4500 Series Software Configuration Manual

Power Management
Command
Step 1
Switch# configure terminal
Step 2
Switch(config)# power redundancy-mode combined
Step 3
Switch(config)# end
Step 4
Switch# show power supplies
The following example shows how to set the power management mode to combined mode:
Switch(config)# power redundancy-mode combined
Switch(config)# end
Switch#
The following example shows how to display the current power redundancy mode. The power supplies
needed by system: 2 indicates that the switch is in combined mode.
Switch# show power supplies
Power supplies needed by system:2
Switch#

Available Power for Catalyst 4500 Series Switches Power Supplies

Table 14-5
When your switch is configured to combined mode, the total available power in not the mathematical
sum of the individual power supplies. The power supplies have a sharing ratio predetermined by the
hardware. In combined mode, the total power available is P + (P * sharing-ratio), where P is the amount
of power in the power supply.
Table 14-5
Power Supply
1000 W AC
1300 W AC
1400 W DC
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
14-14
lists the power available for use in the various Catalyst 4500 series switches power supplies.
Available Power for Switch Power Supplies
Redundant Mode (W)
1
Chassis = 1050
PoE = 0
Chassis (max) = 1050
PoE (max) = 800
Chassis + PoE + Backplane <
1300
Chassis (min) = 200
Chassis (max) = 1360
2
PoE (max) = (DC Input
[Chassis (min) + Backplane] /
0.75) * 0.96
Chapter 14 Environmental Monitoring and Power Management
Purpose
Enters configuration mode.
Sets the power management mode to
combined mode.
Exits configuration mode.
Verifies the power redundancy mode for
the switch.
Combined Mode (W)
Chassis = 1667
PoE = 0
Chassis (min) = 767
PoE (max) = 1333
Chassis (max) = 1667
PoE (min) = 533
Chassis + PoE +
Backplane < 2200
4
Chassis = 2267
5
PoE
3
-
Sharing Ratio
2/3
2/3
Chassis—2/3
PoE—0