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Frame Relay Applications: TCP/IP Suite - Page 5

 By Cisco Press
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Inverse ARP and Routing Tables
The information learned via Inverse ARP is of significant use to IP routers. Using the network represented by Figure 15-21, suppose that Router D has message traffic to forward to Router A.

Figure 15-21: Four-Node Frame Relay WAN with IP Address and DLCI Assignments
Click image for larger view in a new window
(Click image for larger view in a new window)

Router D's routing table would look something like Table 15-11.

Table 15-11: Router D's Routing Table

Destination IP Address Forwarding IP AddressVia DLCI
172.16.24.100 194.213.14.215 105
172.16.24.102 194.213.14.215 105
172.16.24.101 194.213.14.215 105

Router B's routing table would look something like Table 15-12.

Table 15-12: Router B's Routing Table

Destination IP Address Forwarding IP AddressVia DLCI
194.213.14.215194.213.14.214* 17
172.16.24.100172.16.24.100* 25
172.16.24.102172.16.24.102* 37

Router C's routing table would look something like Table 15-13.

Table 15-13: Router C's Routing Table

Destination IP Address Forwarding IP AddressVia DLCI
172.16.24.100172.16.24.100*317
194.213.14.214172.16.24.101348
172.16.24.101172.16.24.101*348

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Our next segment from Cisco Press' Network Consultants Handbook will continue looking at Frame Relay applications and the Novell IPX Suite.

This article was originally published on Jan 30, 2002
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