Cisco Sg3008 Manual

Port Management
Link Aggregation
136 Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version) 
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However, there are cases when one link partner is temporarily not configured for 
LACP. One example for such case is when the link partner is on a device, which is 
in the process of receiving its configuration using the auto-config protocol. This 
devices ports are not yet configured to LACP. If the LAG link cannot come up, the 
device cannot ever become configured....

Port Management
UDLD
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STEP  5Click Apply. The Running Configuration file is updated.
UDLD
See Port Management: Unidirectional Link Detection.
PoE
See Port Management: PoE.
Configuring Green Ethernet
This section describes the Green Ethernet feature that is designed to save power 
on the device. 
It contains the following sections:
•Green Ethernet Overview
•Setting Global Green Ethernet Properties...

Port Management
Configuring Green Ethernet
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Recovery from this mode to full operational mode is fast, transparent, and no 
frames are lost. This mode is supported on both GE and FE 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,...

Port Management
Configuring Green Ethernet
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Power Saving by Disabling Port LEDs
The Disable Port LEDs feature allows the user to save extra power consumed by 
device LEDs. Since most of the time the devices are in an unoccupied room, 
having these LEDs lit is a waste of energy. The Green Ethernet feature enables you 
to disable the port LEDs (for link, speed, and PoE) when they are not required,...

Port Management
Configuring Green Ethernet
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LLDP is used to select the optimal set of parameters for both devices. If LLDP is 
not supported by the link partner, or is disabled, 802.3az EEE still be operational, 
but it might not be in the optimal operational mode.
The 802.3az EEE feature is implemented using a port mode called Low Power Idle 
(LPI) mode. When there is no traffic and this feature is...

Port Management
Configuring Green Ethernet
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Default Configuration
By default, 802.3az EEE and EEE LLDP are enabled globally and per port.
Interactions Between Features
The following describe 802.3az EEE interactions with other features:
•If auto-negotiation is not enabled on the port, the 802.3az EEE operational 
status is disabled. The exception to this rule is that if the link speed is...

Port Management
Configuring Green Ethernet
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STEP  4To see 802.3 EEE-related information on the local device, open the 
Administration > Discovery LLDP >LLDP Local Information page, and view the 
information in the 802.3 Energy Efficient Ethernet (EEE) block. 
STEP  5To display 802.3az EEE information on the remote device, open the Administration 
> Discovery LLDP > LLDP Neighbor Information pages,...

Port Management
Configuring Green Ethernet
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STEP  3Click Apply. The Green Ethernet Properties are written to the Running 
Configuration file.
Setting Green Ethernet Properties for Ports 
The Port Settings page displays the current Green Ethernet and EEE modes per 
port, and enables configuring Green Ethernet on a port using the Edit Port Setting 
page. For the Green Ethernet modes to operate on a...

Port Management
Configuring Green Ethernet
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NOTEShort-reach mode is only supported on RJ45 GE ports; it does not 
apply to Combo ports.
•802.3 Energy Efficient Ethernet (EEE)—State of the port regarding the EEE 
feature :
-Administrative—Displays whether EEE was enabled.
-Operational—Displays whether EEE is currently operating on the local 
port. This is a function of whether it has been enabled...

Port Management
Configuring Green Ethernet
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