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low power idle (802.1az) (LPI)

The IEEE 802.3azworking group is concerned with reducing energy consumption in Ethernet networks. The project developed and standardized by 802.3az is called Energy Efficient Ethernet( EEE). In this process, the transmission links are switched off briefly during periods of low network utilization.

Energy saving with 802.3az, triggered by Low Power Idle (LPI).

Energy saving with 802.3az, triggered by Low Power Idle (LPI).

This function is performed by the control signal called Low Power Idle( LPI), which is used to temporarily switch off the transmitters. If a transmitter sends an LPI signal, this indicates that the link can be switched to idle. To update the state, the LPI signal is retransmitted periodically. As soon as the transmitter wants to return to the normal transmission state, it sends an idle signal, which switches the transmitters to wake mode. After a predetermined time, normal traffic can be handled again via the link.

Informations:
Englisch: low power idle (802.1az) - LPI
Updated at: 04.11.2011
#Words: 139
Links: IEEE 802, Ethernet, project, energy efficient Ethernet (802.3az) (EEE), indium (In)
Translations: DE
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