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Vendor Rev (Revision):
Display the module revision.
Vendor SN (Serial Number):
Show the serial number assigned by the manufacturer.
Date Code:
Show the date this SFP module was made.
Temperature:
Show the current temperature of SFP module.
Vcc:
Show the working DC voltage of SFP module.
Mon1(Bias) mA:
Show the Bias current of SFP module.
Mon2(TX PWR):
Show the transmit power of SFP module.
Mon3(RX PWR):
Show the receiver power of SFP module.
3-1.7 EEE
The section describes how the user can inspect and configure the current EEE port settings.
EEE is a power saving option that reduces the power usage when there is very low traffic use
(or no traffic).
EEE works by powering down circuits when there is no traffic. When a port has data to be
transmitted, all circuits are powered up. The time it takes to power up the circuits is named
wakeup time. The default wakeup time is 17 µs for 1Gbit links and 30 µs for other link speeds.
EEE devices must agree upon the value of the wakeup time in order to make sure that both
the receiving and transmitting device has all circuits powered up when traffic is transmitted.
The devices can exchange information about the devices wakeup time using the LLDP
protocol.
To maximize power saving, the circuit isn't started when transmit data are ready for a port, but
is instead queued until 3000 bytes of data are ready to be transmitted. This does not
introduce a large delay if data less then 3000 bytes shall be transmitted, and data are always
transmitted after 48 us, giving a maximum latency of 48 us + the wakeup time.
If desired, you can minimize the latency for specific frames, by mapping the frames to a
specific queue (done with QOS), and then mark the queue as an urgent queue. When an
urgent queue has data to be transmitted, the circuits will be powered up at once and the
latency will be reduced to the wakeup time.
Web Interface
To configure the EEE Configuration in the Web interface:
1. Click Configuration, Port, then EEE.
2. Choose the port that wants to enable the EEE function.
3. EEE Urgent Queues level and the range from 1 to 8. The queue will
postpone the transmsion until 3000 bytes are ready to be transmitted.
4. Click the Save button to save the setting
5. If you want to cancel the setting, then you need to click the Reset button.
It will revert to previously saved values.