3Com CoreBuilder 2500 - Page 86

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