Green Ethernet - OTS ET42202M-S-PD User Manual

ET42202M-S-PD
L2+ Managed 20-port 100Base-FX/1000Base-X SFP + 4-port 10/100/1000Base-T or
100/1000Base-FX SFP Combo Optical Ethernet Switch with AC + DC inputs
Figure2-1.10: The System Log configuration
Parameter description:
Server Mode :
Indicate the server mode operation. When the mode operation is enabled, the
syslog message will send out to syslog server. The syslog protocol is based on
UDP communication and received on UDP port 514 and the syslog server will not
send acknowledgments back sender since UDP is a connectionless protocol and it
does not provide acknowledgments. The syslog packet will always send out even
if the syslog server does not exist. Possible modes are:
Enabled: Enable server mode operation.
Disabled: Disable server mode operation.
Server Address :
Indicates the IPv4 hosts address of syslog server. If the switch provide DNS
feature, it also can be a host name.
Syslog Level :
Indicates what kind of message will send to syslog server. Possible modes are:
Info: Send information, warnings and errors.
Warning: Send warnings and errors.
Error: Send errors.
Buttons
These buttons are displayed on the NTP page:
Apply – Click to save changes.
Reset - Click to undo any changes made locally and revert to previously saved
values.

2-2 Green Ethernet

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
www.ot-systems.com
14
Ver.1.0