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3-8.5 EEE
Parameter
Description
By using EEE, power savings can be achieved at the expense of traffic latency. This
latency occurs because the circuits EEE turnd off to save power and needs time to
boot up before sending traffic over the link. This time is called "Wakeup Time". To
achieve minimal latency, devices can use 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.
Web Interface
To show LLDP EEE neighbors:
1.
Click LLDP, then click EEE to show discover EEE devices.
2.
Click “Refresh” for manual update web screen.
3.
Click “Auto-refresh” for auto-update web screen.
Figure 3-8.5: The LLDP Neighbors EEE information
Local Port:
The port on which LLDP frames are received or transmitted.
Tx Tw:
The link partner’s maximum time that transmit path can hold off sending
data after reassertion of LPI.
Rx Tw:
The link partner’s time that receiver would like the transmitter to hold off
allowing time for the receiver to wake from sleep.
Fallback Receive Tw:
The link partner’s fallback received 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 for a more
efficient allocation. Systems that do not implement this option default the value to
be the same as that of the Receive Tw_sys_tx.
Echo Tx Tw:
The link partner's Echo Tx Tw value.
The respective echo values shall be defined as the local link partner’s reflection
(echo) of the remote link partners respective values. When a local link partner
receives its echoed values from the remote link partner, it can determine whether
or not the remote link partner has received, registered, and processed its most
recent values. For example, if the local link partner receives echoed parameters that
do not match the values in its local MIB, then the local link partner infers that the
remote link partners request was based on stale information.
Echo Rx Tw:
The link partner's Echo Rx Tw value.
NOTE:
If your network without any devices which enables EEE function
then the table will show “No LLDP EEE Information Found”.