Reference Guide

358 | Open Shortest Path First (OSPFv2)
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Figure 20-2 shows some examples of the different router designations.
Figure 20-2. OSPF Routing Examples
Router A
Router D
Router B
Router C
Router E
Router F
Router G
Router H
Router I
Router J
Router L
Router K
Router M
Area 100
Area 200
Area 300
Area 0
Stub Area
Area Border Router
Interior Router
Interior Router
Not So Stubby Area
Backbone Area
OSPF AS 9999
OSPF AS 8888
Router K
Router 8000
Autonomous System
Boundary Router
Router 81
Router 82
Autonomous System
Boundary Router
Backbone Router
Interior Router
Interior Router
Interior Router