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Instruction Manual
157
Auto-negotiation
status
Auto-negotiation status identifies if auto-negotiation is
currently enabled at the link partner. If Auto-negotiation is
supported and Auto-negotiation status is disabled, the 802.3
PMD operating mode will be determined by the operational
MAU type field value rather than by auto-negotiation.
Auto-negotiation
Capabilities
Auto-negotiation Capabilities show the link partners MAC/
PHY capabilities.
1. To view information about the LLDP-MED neigbors, on the main screen of the Web
management UI, click
Monitor
>
LLDP
>
LLED-MED
.
Change the EEE settings
EEE power savings can be achieved at the expense of traffic latency. This latency
occurs because the circuits EEE turns 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 wake up time they need.
You can access the screen by clicking
Monitor
>
LLDP
>
EEE
.
Menu option
Description
Local Port
Indicates the port on which the LLDP frame was received.
Tx Tw
Indicates the link partner’s maximum time that the transmit
path can hold-off sending data after deassertion of LPI.
Rx Tw
Indicates the link partner’s time that the receiver would like
the transmitter to hold-off to allow time for the receiver to
wake from sleep.
Fallback Receive
TW
Indicates 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.