Port - Eee - Draytek VigorSwitch P2261 User Manual

Poe 24+2 giga port l2 managed switch
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Mon1(Bias)
Mon2(TX PWR)
Mon3(RX PWR)
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EEE is a power saving option that reduces the power usage when there is very low traffic
utilization (or no traffic). EEE works by powering down circuits when there is no traffic.
When a port gets 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 us for 1Gbit
links and 30 us 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.
For maximizing the power saving, the circuit isn't started at once transmit data are ready for
a port, but is instead queued until 3000 bytes of data are ready to be transmitted. For not
introducing a large delay in case that data less then 3000 bytes shall be transmitted, data are
always transmitted after 48 us, giving a maximum latency of 48 us + the wakeup time.
If desired it is possible to 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 gets data to be transmitted, the circuits will be powered up at once and the
latency will be reduced to the wakeup time.
Function name:
EEE
Function description:
The section allows the user to inspect and configure the current EEE port settings.
Parameter description:
Port
EEE Enabled
VigorSwitch P2261 User's Guide
Show the Bias current of SFP module.
Show the transmit power of SFP module.
Show the receiver power of SFP module.
E
E
E
E
The switch port number of the logical EEE port.
Controls whether EEE is enabled for this switch port.
39

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