D-Link DES-3326 User Manual page 218

24-port NWay Ethernet Switch User's Guide
The target port is the port where information will be duplicated
and sent for capture and network analysis. This is the port
where a network analyzer would be attached to capture packets
duplicated from the source port.
To select the source port(s) for mirroring:
Highlight Setup Port Mirroring and press enter.
Figure 6-52. Setup Port Mirroring
The Action:< > field can be toggled between Add/Modify and
Delete using the space bar. Entries can be added, modified or
deleted based upon the port number entered in the Source Port
[ ] field.
The Direction:< > field can be toggled between Either,
Ingress and Egress. Either mirrors both received and
transmitted packets at the given port. Ingress mirrors only
received packets, while Egress mirrors only transmitted packets.
202 Configuring the Switch Using the Console Interface