Interlogix NS3500-28T-4S User Manual - Manual (Page 94)

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The page includes the following fields:
Object Description
 Protected Ports Display the current protected ports.
 Unprotected Ports Display the current unprotected ports.
4.3.10 EEE
What is EEE?
EEE is a power saving option that reduces the power usage when there is low or no traffic utilization. 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
wakeup time information using the LLDP protocol. EEE works for ports in auto-negotiation mode, where the port is
negotiated to either 1G or 100 Mbit full duplex mode. For ports that are not EEE-capable the corresponding EEE
checkboxes are grayed out and thus impossible to enable EEE for. The EEE port settings relate to the currently unit,
as reflected by the page header.
When a port is powered down for saving power, outgoing traffic is stored in a buffer until the port is powered up again.
Because there are some overhead in turning the port down and up, more power can be saved if the traffic can be
buffered up until a large burst of traffic can be transmitted. Buffering traffic will give some latency in the traffic.
The EEE Port Setings screen in Figure 4-3-18 & Figure 4-3-19 appears.
Figure 4-3-18 Port Isolation Status Page Screenshot