Falcon
M-Class
| User Guide
289
4.20.3.3
LLDP Neighbours EEE Information
By using EEE power savings can be achieved at the expense of traffic latency. This latency occurs
due to that the circuits EEE turn off to save power, need 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.
EEE is an abbreviation for Energy Efficient Ethernet defined in IEEE 802.3az.
This page provides an overview of EEE information exchanged by LLDP
Figure 4-160: LLDP Neighbors EEE Information
Table 4-153: LLDP Neighbors EEE Parameters
LLDP Neighbors EEE Information
The displayed table contains a row for each interface.
If the interface does not supports EEE, then it displays as "EEE not supported for this interface".
If EEE is not enabled on particular interface, then it displays as "EEE not enabled for this
interface".
If the link partner doesn't supports EEE, then it displays as "Link partner is not EEE capable.
The columns hold the following information:
Local Interface
The interface at which LLDP frames are received or transmitted
Tx Tw
The link partner's maximum time that transmit path can hold-off sending
data after deassertion of LPI.
Rx Tw
The link partner's time that receiver would like the transmitter to hold-off
to allow time for the receiver to wake from sleep.
Fallback Receive
Tw
The link partner's fallbacks 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 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.
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