Users Guide

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Energy-efficient Ethernet
Energy-efficient Ethernet (EEE) reduces power consumption of physical layer devices (PHYs) during idle periods. EEE allows
Dell EMC Networking devices to conform to green computing standards.
An Ethernet link consumes power when a link is idle. EEE allows Ethernet links to use Regular Power mode only during data
transmission. EEE is enabled on devices that support LOW POWER IDLE (LPI) mode. Such devices save power by entering LPI
mode during periods when no data is transmitting.
In LPI mode, systems on both ends of the link saves power by shutting down certain services. EEE transitions into and out of
LPI mode transparently to upper-layer protocols and applications.
EEE advertises during the auto-negotiation stage. Auto-negotiation detects abilities supported by the device at the other end of
the link, determines common abilities, and configures joint operation.
Auto-negotiation performs at power-up, on command from the LAN controller, on detection of a PHY error, or following
Ethernet cable re-connection. During the link establishment process, both link partners indicate their EEE capabilities. If EEE is
supported by both link partners for the negotiated PHY type, EEE functions independently in either direction.
Changing the EEE configuration resets the interface because the device restarts Layer 1 auto-negotiation. You may want to
enable Link Layer Discovery Protocol (LLDP) for devices that require longer wake-up times before they are able to accept data
on their receive paths. Doing so enables the device to negotiate extended system wake-up times from the transmitting link
partner.
NOTE: The EEE feature is applicable only for Base-T switches.
Enable energy-efficient Ethernet
EEE is disabled by default. To reduce power consumption, enable EEE.
1. Enter the physical Ethernet interface information in CONFIGURATION mode.
interface ethernet node/slot/port[:subport]
2. Enable EEE in INTERFACE mode.
eee
Enable EEE
OS10(config)# interface ethernet 1/1/1
OS10(conf-if-eth1/1/1)# eee
Disable EEE
OS10(config)# interface ethernet 1/1/1
OS10(conf-if-eth1/1/1)# no eee
Clear EEE counters
You can clear EEE counters on physical Ethernet interfaces globally or per interface.
Clear all EEE counters
OS10# clear counters interface eee
Clear all eee counters [confirm yes/no]:yes
Interfaces
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