Cisco Catalyst 4500 Series Configuration Guide

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Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
OL-25340-01
Chapter 12 Environmental Monitoring and Power Management
Power Management
Caution If you have power supplies with different types or different wattages installed in your switch, the switch
does not recognize one of the power supplies and does not have power redundancy.
• For fixed power supplies, choose a power supply that 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 Table 12-5
on page 12-14.
To configure redundant mode on your Catalyst 4500 series switch, perform this task:
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#
An option in the combined mode provides a form of redundancy available with only the 4200 W AC and
6000 W AC power supplies. Refer to the section “Combined Mode Power Resiliency” on page 16.
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 has no power redundancy.
To effectively use combined mode, follow these guidelines:
• 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 utilizes only one of the power
supplies.
Command Purpose
Step 1
Switch# configure terminal
Enters configuration mode.
Step 2
Switch(config)# power redundancy-mode redundant
Sets the power management mode to
redundant mode.
Step 3
Switch(config)# end
Exits configuration mode.
Step 4
Switch# show power supplies
Verifies the power redundancy mode for
the switch.

Cisco Catalyst 4500 Series Specifications

General

Series	Catalyst 4500 Series
Category	Switch
Layer Support	Layer 2, Layer 3
Form Factor	Modular chassis
Stackable	No
Chassis Slots	3, 6, 7, 10
Power Supply Options	AC, DC
Redundancy	Power supply, Supervisor engine
Network Management	Cisco IOS Software CLI, SNMP, Cisco Prime Infrastructure
Features	Security, QoS
Port Density	Up to 384 ports per chassis
Security Features	802.1X, ACLs, DHCP Snooping, Dynamic ARP Inspection, IP Source Guard
Supervisor Engine	8-E