Allied Telesis AT-S63 - Manual (Page 116)

Chapter 8: Port Mirroring
116 Section I: Basic Features
Figure 35 shows an example of the Modify Mirror page configured for a
port mirror. The egress traffic on ports 11 and 12 is being mirrored to
the destination port 5.
Figure 35. 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. From the Configuration menu, select the Save Config option to
permanently save your changes. (This option is not displayed if there
are no changes to save.)