Compatible Systems 5.4 - Manual (Page 264)

258 Chapter 15 - OSPF
collection of networks under a common administration sharing a common
routing strategy.
All routers within an area have the same link-state database. An interface can
only belong to one area, although different interfaces on a router can belong
to different areas, making the router an Area Border Router. Area Border
Routers disseminate routing information or routing changes between areas.
OSPF Area Dialog Box
You can access the OSPF Area Dialog Box by selecting OSPF/OSPF Area
from the device view.
To add or modify the entries, select the appropriate button to access the Add
OSPF Area Dialog Box.
Add OSPF Area Dialog Box