Port Mirroring - D-Link DGS-3224TG User Manual

capabilities of the device at the other end. The other selections allow you to force the port to
operate in the specified manner. Select 1000M/Full for port operation at 1000 Mbps and full
duplex. Select 100M/Half for port operation at 100 Mbps and half duplex Select 100M/Full for
port operation at 100 Mbps and full duplex. Select 100M/Half for port operation at 100 Mbps
and half duplex. Select 10M/Full for port operation at 10 Mbps and full duplex. Select
10M/Half for port operation at 10 Mbps and half duplex. The four GBIC ports are 1000M/Full
only.
3. Configure the Flow Control setting for the port. Selecting Enabled in full-duplex mode will
implement IEEE 802.3x flow control. Select Disabled for no flow control. Also, if the port is set
for Auto (NWay) in the speed/duplex field above and flow control is enabled, flow control
(whether full- or half-duplex) will only be implemented if the other device can auto-negotiate
flow control.
4. Click Apply to let your changes take effect.

Port Mirroring

The switch allows you to copy frames transmitted and received on a port and redirect the copies to
another port. You can attach a monitoring device to the mirrored port, such as a sniffer or an RMON
probe, to view details about the packets passing through the first port.
To configure a mirror port, first select the Source Port—from where you want to copy frames—and the
Ingress Target Port or Egress Target Port—which receives the copies from the source port. This is the
port where you will connect a monitoring/troubleshooting device such as a sniffer or an RMON probe.
Next, select the Source Direction, Ingress, Egress, or Ingress & Egress , and None from the Status pull-
down menu. Finally, click Apply to let the changes take effect.
Note: You cannot mirror a fast port onto a slower port. For example, if you try to mirror the traffic
from a 100 Mbps port onto a 10 Mbps port, this can cause throughput problems. The port
you are copying frames from should always support an equal or lower speed than the port
to which you are sending the copies. Also, the target port for the mirroring cannot be a
member of a trunk group. Please note a target port and a source port cannot be the same
port.
Figure 7-5. Port Mirroring window
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DGS-3224TG Gigabit Ethernet Switch User's Guide