Cisco Catalyst 4500 Series Command Reference Guide

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Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
power efficient-ethernet auto
power efficient-ethernet auto
To enable EEE, use the power efficient-ethernet auto command. To disable EEE, use the no form of
this command.
power efficient-ethernet auto
no power efficient-ethernet auto
Syntax Description This command has no arguments or keywords.
Defaults EEE is disabled
Command Modes Global configuration mode
Command History
Usage Guidelines EEE is supported on WS-X4748-UPOE+E and WS-X4748-RJ45-E.
EEE defines support for physical layer devices (PHYs) to operate in Low Power Idle (LPI) mode. When
enabled, EEE supports QUIET times during low link utilization allowing both sides of a link to disable
portions of each PHY's operating circuitry and save power. This functionality is provided per port and
is not enabled by default. To avoid issues with EEE functionality on any port during run-time, Cisco
provides the power efficient-ethernet auto command to enable or disable EEE.
Because EEE relies on Auto Negotiation pulse to determine whether to activate EEE, the port must
initially enable auto negotiation. Furthermore, EEE is the correct action provided the speed is auto
100M, auto 1000M, or auto 100M and 1000M. 10M (either auto or forced mode) does not require EEE
for power saving.
Examples This example shows how to enable EEE:
Switch# config t
Switch(config)# interface gigabitethernet 1/1
Switch(config-if)# power efficient-ethernet auto
Switch(config-if)# exit
Release Modification
Release IOS XE
3.4.0SG and IOS
15.1(2)SG
Support for this command was introduced on the Catalyst 4500 series 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