OPTICAL SYSTEMS DESIGN
DOC ID: 10118101
OSD2512 OPERATOR MANUAL
PAGE 365
LLDP NEIGHBOURS EEE INFORMATION
Monitor
LLDP
EEE
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.
This page provides an overview of EEE information exchanged by LLDP.
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 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
