Evidence Cross-8/HPoE-10G, Руководство пользователя

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2-4.6 LLDP Neighbour 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 .
Web Interface
To show LLDP neighbor EEE:
1.
Click System, LLDP and LLDP Neighbour EEE.
2. Click Refresh for manual update web screen.
3. Click Auto-refresh for auto-update web screen.
Figure 2-4.6: The LLDP Neighbour EEE information
Parameter description

Local Port :
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 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 partners reflection (echo) of the