D-Link DGS-3024, Manual

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DGS-3024 Gigabit Ethernet Switch Manual
Port Mirroring
The Switch allows the user to copy frames transmitted and received on a port and redirect the copies to another port. The user 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.
Figure 7- 6. Setup Port Mirroring window
To configure a mirror port:
1. Select the Source Port from where you want to copy frames and the Target Port, which receives the copies from the
source port.
2. Select Ingress, Egress, or None and change the Statu s drop-down menu to Enabled .
3. Click Apply to let the changes take effect.
NOTE: A fast port cannot be mirrored onto a slower port. For example, trying to mirror the
traffic from a 100 Mbps port onto a 10 Mbps port can cause throughput problems. The
port which frames are being copied from should always support an equal or lower speed
than the port to which copies are being sent. In addition, 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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