Avaya Configuring IP Services Bedienungsanleitung Seite 148

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Configuring IP Services
4-10
Configuring a Border Router
Each area is connected to the backbone by one or more border routers. In
Figure 4-2, for example, R3 is a border router connecting Area A to the backbone.
A border router can have connections to multiple areas. In Figure 4-4, for
example, BR 2 has an interface to a network in Area B and an interface to a
network in Area C.
Figure 4-4. Area Border Router
Each border router in an AS
Receives routing information from its attached areas, creates summaries of
this information, and forwards the summaries to the backbone and to any
other attached area. In Figure 4-4, for example, BR2 floods summaries from
Area B to the backbone and Area C. Through the backbone, the summaries
are forwarded to all other areas in the AS.
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