Cisco 4500M Software Manual page 122

Power Management
If you have power supplies with different types or different wattages installed in your switch, the switch
Caution
will not recognize one of the power supplies and will not have power redundancy.
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To configure redundant mode on your Catalyst 4500 series switch, perform this task:
Command
Step 1
Switch# configure terminal
Step 2
Switch(config)# power redundancy-mode redundant
Step 3
Switch(config)# end
Step 4
Switch# show power supplies
The power redundancy-mode redundant command is not supported on a Catalyst 4006 switch.
Note
The following example shows how to set the power management mode to redundant mode.
Switch (config)# power redundancy-mode redundant
Switch (config)# end
Switch#
The following example shows how to display the current power redundancy mode. The power supplies
needed by system: 1 indicates that the switch is in redundant mode.
Switch# show power supplies
Power supplies needed by system :1
Switch#
Configuring Combined Mode on a Catalyst 4500 Series Switch
If your switch configuration requires more power than a single power supply can provide, set the power
management mode to combined mode. Combined mode utilizes the available power for both power
supplies; however, your switch will have no power redundancy.
To effectively use combined mode, follow these guidelines:
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Software Configuration Guide—Release 12.2(25)EW
7-8
For fixed power supplies, choose a power supply that by itself is powerful enough to support the
switch configuration.
For variable power supplies, choose a power supply that provides enough power so that the chassis
and PoE requirements are less than the maximum available power. Variable power supplies
automatically adjust the power resources at startup to accommodate the chassis and PoE
requirements. Modules are brought up first, followed by IP phones.
The maximum available power for chassis and PoE for each power supply are listed in
page 7-10.
Use power supplies of the same type and wattage (fixed or variable and AC or DC).
If you use power supplies with different types or wattages, the switch will utilize only one of the
power supplies.
Chapter 7 Environmental Monitoring and Power Management
Purpose
Enters configuration mode.
Sets the power management mode to
redundant mode.
Exits configuration mode.
Verifies the power redundancy mode for
the switch.
Table 7-3 on
OL-6696-01