Dell PowerSwitch S4112F-ON OS10 Enterprise Edition User Guide Release 10.4.1.0 - Page 97

Energy-efficient Ethernet Energy-efficient 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 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 reconnection. 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 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 for extended system wake-up times from the transmitting link partner. Enable energy-efficient 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 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 Clear counters for specific interface OS10# clear counters interface 1/1/48 eee Clear eee counters on ethernet1/1/48 [confirm yes/no]:yes Interfaces 97