Your software release
may not support all the features documented in this module. For the latest
caveats and feature information, see Bug Search Tool and the release notes for
your platform and software release. To find information about the features
documented in this module, and to see a list of the releases in which each
feature is supported, see the feature information table at the end of this
Use Cisco Feature
Navigator to find information about platform support and Cisco software image
support. To access Cisco Feature Navigator, go to
An account on Cisco.com is not required.
Information About EEE
Energy Efficient Ethernet (EEE) is an IEEE 802.3az standard that is designed to reduce power consumption in Ethernet networks during idle periods.
EEE can be enabled on devices that support low power idle (LPI) mode. Such devices can save power by entering LPI mode during periods of low utilization. In LPI mode, systems on both ends of the link can save power by shutting down certain services. EEE provides the protocol needed to transition into and out of LPI mode in a way that is transparent to upper layer protocols and applications.
EEE is disabled by default.
Restrictions for EEE
EEE has the following restrictions:
Changing the EEE configuration resets the
interface because the device has to restart Layer 1
You might want to enable the Link Layer
Discovery Protocol (LLDP) for devices that require longer wakeup
times before they are able to accept data on their receive paths.
Doing so enables the device to negotiate for extended system wakeup
times from the transmitting link partner.
How to Configure EEE
You can enable or disable EEE on an interface that is connected to an EEE-capable link partner.
Support website provides extensive online resources, including documentation
and tools for troubleshooting and resolving technical issues with Cisco
products and technologies.
security and technical information about your products, you can subscribe to
various services, such as the Product Alert Tool (accessed from Field Notices),
the Cisco Technical Services Newsletter, and Really Simple Syndication (RSS)
most tools on the Cisco Support website requires a Cisco.com user ID and