HP 11i Manual de usuario descargar pdf (Pagina 61)

Conﬁguring gated

Conﬁguring the OSPF Protocol

Chapter 3 61

Figure 3-3 Areas Deﬁned in an Autonomous System

Internal routers have all their directly connected networks in the same

area. In Figure 3-3, routers A, B, and H are internal routers.

Routers that are connected to multiple areas are called area border

routers. In Figure 3-3, routers F and G are area border routers.

Routers that connect one AS to another are called AS boundary

routers. In Figure 3-3, router D is an AS boundary router.

Neighbor routers are routers that interface to a common network.

OSPF uses its own Hello subprotocol to determine which routers are

neighbors. In Figure 3-3, routers A, B, and C are a set of neighbor routers

that interface to network 1, while routers A and F are another set of

neighbor routers that interface to network 2.

NOTE The Hello subprotocol used with OSPF is not the same as the gated

HELLO protocol. The Hello subprotocol is still supported.

Area 1

Other AS

Area 2 Area 3

Legend:

Network

Router

Area

Backbone

1 2 ... 56 57 58 59 60 61 62 63 64 65 66 ... 112 113

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HP 11i Manual de usuario Pagina 61