Reference Guide

Energy-ecient Ethernet
Energy-ecient Ethernet (EEE) reduces power the consumption of physical layer devices (PHYs) during idle periods. EEE allows Dell
Networking devices to conform to green computing standards.
An Ethernet link consumes power when a link is idle. EEE allows for Ethernet links to use the regular power mode only during data
transmission. EEE is enabled on devices that support LOW POWER IDLE (LPI) mode. Such devices can save power by entering LPI mode
during periods when no data is transmitted.
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 congures 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, the EEE function is used independently in either direction.
Changing the EEE conguration 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 for extended system wake-up times from the transmitting link partner.
Enable energy-ecient Ethernet
To reduce power consumption, enable EEE. EEE is disabled by default.
1 Enter the physical Ethernet interface information in CONFIGURATION mode.
interface ethernet node/slot/port[:subport]
2 Enable EEE in INTERFACE mode.
eee
3 Save the conguration.
do commit
Enable EEE
OS10(config)# interface ethernet 1/1/1
OS10(conf-if-eth1/1/1)# eee
OS10(conf-if-eth1/1/1)# do commit
Disable EEE
OS10(config)# interface ethernet 1/1/1
OS10(conf-if-eth1/1/1)# no eee
OS10(conf-if-eth1/1/1)# do commit
Clear interface counters
You can clear EEE counters for physical Ethernet interfaces globally or per interface.
Clear all EEE counters
OS10# clear counters interface eee
Clear all eee counters [confirm yes/no]:yes
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System management