D-Link DES-3326SR User Manual page 238

DES-3326SR Layer 3 Fast Ethernet Switch User's Guide
To configure OSPF Area Aggregation on the switch, click
the Area Aggregation Configuration link under the OSPF
folder:
Figure 6 - 59. OSPF Aggregation Configuration
To add an OSPF Area Aggregation entry on the switch,
click the New button:
Figure 6 - 60. OSPF Aggregation Configuration − Add
226