D-Link DES-3326S User Manual page 252

The following fields can be set:
Parameter
Source Port
Direction <Ingress>
252
DES-3326S Layer 3 Fast Ethernet Switch User's Guide
Description
Allows the entry of the port number
of the port to be mirrored. This port
is the source of the packets to be
duplicated and forwarded to the
Target port.
This field can be toggled between
Either, Ingress and Egress. Ingress
mirrors only received packets, while
Egress mirrors
packets.
only transmitted
Web-Based Switch Management