27
Table of Contents
Linksys
27
Table of Contents
Linksys
•
LACP—Select to enable LACP on the selected LAG This makes it a
dynamic LAG This field can only be enabled after moving a port to the
LAG in the next field
•
Protected LAG—Select to make the LAG a protected port for Layer 2
isolation See the Port Configuration description in Setting Basic Port
Configuration for details regarding protected ports and LAGs
•
Auto Negotiation—Select to enable auto-negotiation on the LAG Auto-
negotiation is a protocol between two link partners that enables a LAG to
advertise its transmission speed and flow control to its partner (the Flow
Control default is disabled) It is recommended to keep auto-negotiation
enabled on both sides of an aggregate link, or disabled on both sides,
while ensuring that link speeds are identical
•
Port Speed—Configure the speed of the LAG The port types determine
the available speeds You can designate this field only when port auto-
negotiation is disabled
•
Auto Advertisement—Select the capabilities to be advertised by the LAG
The options are as follows:
•
Max Capability—All LAG speeds and both duplex modes are available
•
10 Full Duplex—The LAG advertises a 10 Mbps speed and the mode
is full duplex
•
100 Full Duplex—The LAG advertises a 100 Mbps speed and the
mode is full duplex
•
1000 Full Duplex—The LAG advertises a 1000 Mbps speed and the
mode is full duplex
•
Flow Control—Set Flow Control to either Enable or Disable or Auto-
Negotiation
•
Description—Enter the LAG name or a comment
STEP 5 Click Apply LAG membership is saved to the Running Configuration file
Green Ethernet
This section describes the Green Ethernet feature that is designed to save
power on the device
Green Ethernet is a common name for a set of features that is designed to be
environmentally friendly, and to reduce the power consumption of a device
Green Ethernet is different from EEE in that Green Ethernet energy-detect is
enabled on all devices where only the gigabyte ports are enable with EEE
The Green Ethernet feature can reduce overall power usage in the
following ways:
•
Energy-Detect Mode—In this mode, the switch conserves power
when the operational status of a port is down Energy-Detect Mode is
supported on all ports
•
Short-Reach Mode—This feature provides for power savings on a short
length of cable After cable length is analyzed, the power usage is adjusted
for various cable lengths If the cable is shorter than 50 meters, the device
uses less power to send frames over the cable, thus saving energy This
mode is only supported on RJ45 GE ports; it does not apply to Combo ports
This mode is globally disabled by default It cannot be enabled if EEE mode
is enabled (see below)
802 3 Energy Efficient Ethernet (EEE)—EEE reduces power consumption
when there is no traffic on the port See Energy Efficient Ethernet Feature
for more information
EEE is enabled globally by default On a given port, if EEE is enabled, short
reach mode will be disabled If Short Reach Mode is enabled, EEE is grayed
out
These modes are configured per port, without taking into account the LAG
membership of the ports
Power savings, current power consumption and cumulative energy saved
can be monitored The total amount of saved energy can be viewed as a
percentage of the power that would have been consumed by the physical
interfaces had they not been running in Green Ethernet mode
The saved energy displayed is only related to Green Ethernet The amount of
energy saved by EEE is not displayed
Energy Efficient Ethernet Feature
EEE is designed to save power when there is no traffic on the link In Green
Ethernet, power is reduced when the port is down With EEE, power is reduced
when the port is up, but there is no traffic on it
When using 802 3 EEE, systems on both sides of the link can disable portions
of their functionality and save power during periods of no traffic
802 3 EEE supports IEEE 802 3 MAC operation at 100 Mbps and 1000 Mbps:
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