3Com corebuilder 3500 Implementation Manual page 374

374 C 14: O
HAPTER PEN
Segment 2
Router 1
Segment 3
Router 2
S P F (OSPF)
HORTEST ATH IRST
Figure 70 Sample OSPF Routing Application
Area 2
(stub)
Area
border
router 1
Area 0 (backbone)
Segment 1
Segment 4
Router 3
Point-
Segment 5
to-point
link
Area
border
router 3
Area
border
router 2
Router 4
Segment 6
Virtual link
Autonomous system A
Area 1
Segment 7 Segment 8
Router 5 Router 6
Segment 9
Autonomous
system
boundary
Area
router 1
border
router 4
Area 3
Autonomous
system
boundary
router 2
Autonomous system B