TRENDnet TI-PG541i User Manual page 28

TRENDnet User's Guide
Web Configuration
Basic Settings > Port Mirroring
Parameter Description
Select Enable to turn on port mirroring or select Disable to turn it
State
off.
Monitor to Port Select the port which connects to a network traffic analyzer.
Settings in this field apply to all ports.
Use this field only if you want to make some settings the same
All Ports for all ports.
Use this field first to set the common settings and then make
adjustments on a port-by-port basis.
Source Port This field displays the number of a port.
Select Ingress, Egress or Both to only copy the ingress (incoming),
egress (outgoing) or both (incoming and outgoing) traffic from the
Mirror Mode specified source ports to the monitor port. Select Disable to not
copy any traffic from the specified source ports to the monitor
port.
Apply Click Apply to take effect the settings.
Refresh Click Refresh to begin configuring this screen afresh.
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Port Settings

Duplex mode
A duplex communication system is a system composed of two connected parties or
devices that can communicate with one another in both directions.
Half Duplex:
A half-duplex system provides for communication in both directions, but only one
direction at a time (not simultaneously). Typically, once a party begins receiving a signal,
it must wait for the transmitter to stop transmitting, before replying.
Full Duplex:
A full-duplex, or sometimes double-duplex system, allows communication in both
directions, and, unlike half-duplex, allows this to happen simultaneously. Land-line
telephone networks are full-duplex, since they allow both callers to speak and be heard
at the same time.

Loopback Test
A loopback test is a test in which a signal in sent from a communications device and
returned (looped back) to it as a way to determine whether the device is working right or
as a way to pin down a failing node in a network. One type of loopback test is performed
using a special plug, called a wrap plug that is inserted in a port on a communications
device. The effect of a wrap plug is to cause transmitted (output) data to be returned as
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