5.31
LLDP – EEE
By using Energy Efficient Ethernet (EEE) power savings can be achieved at the expense of traffic latency. This latency results from the time required to boot up circuits that were turned off by EEE to save power. This time is called “wakeup time”. To achieve minimal latency, devices can use Link Layer Discovery Protocol (LLDP) to exchange information about their respective Tx and Rx “wakeup time”, as a way to agree upon the minimum wakeup time they need. This page provides an overview of EEE information exchanged by LLDP.
5.31.1
LLDP Neighbors EEE Information The displayed table contains a row for each port. The columns display the following information: Local Port This column displays the port on which LLDP frames are received or transmitted. Tx Tw This column displays the maximum time that link partner’s transmit path can hold-off sending data after de-assertion of LPI. Rx Tw This column displays the time that link partner’s receiver would like the transmitter to hold-off to allow time for the receiver to wake from sleep. Fallback Receive Tw This column displays the link partner’s fallback receive Tw. A receiving link partner may inform the transmitter of an alternate desired Tw_sys_tx. Since a receiving link partner is likely to have discrete levels for savings, this provides the transmitter with additional information that it may use
SMB - CLI UM
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