3Com 4007 Implementation Manual page 463

Figure 54 Sample OSPF Routing Application
Area 2
Segment 2
Router 1
Segment 3
Point-
to-point
link
Router 2
(stub)
Area
border
router 1
Area 0 (backbone)
Segment 1
Segment 4
Router 3
Segment 5
Area
border
router 3
Virtual link
Area
border
router 2
Router 4
Segment 6
router 4
Area 3
Areas
Autonomous system A
Area 1
Segment 7 Segment 8
Router 5 Router 6
Segment 9
Autonomous
system
boundary
Area
router 1
border
Autonomous
system
boundary
router 2
Autonomous system B
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