Allied Telesis AT-S63 - Manual (Page 116)

Chapter 8: Port Mirroring
116 Section I: Basic Features
Figure 32 shows an example of the Modify Mirror page configured for a
port mirror. The ingress and egress traffic on ports 1, 2, and 7 to 10 is
being mirrored to the destination port 11.
Figure 32. Example of a Modify Mirror Page
6. After selecting the destination and source ports, click the Enable
Mirror check box.
7. Click Apply.
The port mirror is now active on the switch. You can connect a data
analyzer to the destination port to monitor the traffic on the source
ports.
8. To permanently save your changes, select the Save Config option in
the Configuration menu.