Avaya Configuring IP Services Manuel d'utilisateur Page 30

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Configuring IP Services
2-2
Configuring IP Interfaces
An IP network interface consists of a physical circuit configured with the
appropriate data link and IP protocols. Each interface connects the router to one or
more IP networks.
For example, the router in Figure 2-1 is configured with three IP interfaces. One of
these interfaces is a point-to-point interface that connects the router to a single
long-haul medium terminated by a host or another router. The other two interfaces
are LAN interfaces that connect the router to an Ethernet or FDDI local area
medium.
An IP interface can provide access to multiple networks. For example, in Figure
2-1, LAN interface 1 provides a connection to both LAN B and LAN C.
Figure 2-1. IP Interface
LAN A
LAN B
Router
Host
D
Host
C
LAN C
LAN Interface 1
LAN Interface 2
WAN A
Point-to-Point Interface
Host
E
Host
B
Host
A
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