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DES-3010F/DES-3010FL/DES-3010G/DES-3016/DES-3018/DES-3026 Fast Ethernet Switch Manual
38
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 Administration > Port Mirroring
Figure 6- 12. Port Mirroring window
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.
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.