In addition to the Designated Router and the Backup Designated Router on Multi-Access segments, OSPF routers are also described based on their location and function within the OSPF network. The additional router types that are commonly found within the OSPF network include the following:
- Area Border Routers
- Autonomous System Boundary Routers
- Internal routers
- Backbone routers
Figure 39.5 below illustrates a basic OSPF network comprised of two areas, the OSPF backbone area (Area 0) and an additional normal OSPF area (Area 2). R2 has an external BGP neighbour relationship . . .
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