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Energy efficient Ethernet switches can provide significant global savings in electricity consumption. The IEEE 802.3az task force (Energy Efficient Ethernet) is exploring methods for scaling Ethernet link rate as a function of utilization to save energy. IEEE 802.3az is studying methods that require both end points of an Ethernet link to implement new mechanisms and policies, thus these methods cannot achieve energy savings with existing Ethernet devices. In this white paper, a new backwards compatible method for achieving energy savings in Ethernet switches is designed, emulated, and evaluated. This new method is called PAUSE Power Cycle (PPC). PPC uses 802.3 PAUSE flow control to cycle Ethernet links between ON and OFF (PAUSEd) states.

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Format:PDFSize:374 KB
Date:Apr 2008
Pages:15

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