Port Mirroring - D-Link DGS-3324SRi User Manual

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. This is useful for network monitoring and troubleshooting purposes. To view the Port
Mirroring window, click Port Mirroring in the Configuration folder.
To configure a mirror port:
Select the Source Port from where you want to copy frames and the Target Port, which receives the copies
from the source port.
Select the Source Direction, Ingress, Egress, or Both and change the Status drop-down menu to Enabled.
Click Apply to let the changes take effect.
xStack Stackable Gigabit Layer 3 Switch Manual
Figure 6- 7. Port Mirroring window
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.
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