D-Link DES-1228 - Manual (Page 58)

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The Static Mac Address Setting table displays the static Mac
addresses connected, as well as the VID. Press Delete to remove a
device. To add a new Mac address assignment, press Add Mac, then
select the assigned Port number, enter both the Mac Address and VID
and press Apply.
Security > Mac Address Table > Dynamic Forwarding Table
For each port, this table displays the Mac address of each packet
passing through the Switch. To add a Mac address to the Static Mac
Address List, click the Add checkbox associated with the identified
packet.
Figure 403 – Security > Dynamic Forwarding Table