Route Redistribution
365
F I G U R E 1 0 . 1
Company A's EIGRP configuration
Company B ran RIP as its interior routing protocol, as shown in Figure 10.2,
because Company B's network had mixture of routing vendors. One day,
Company A and Company B merged.
F I G U R E 1 0 . 2
Company B's RIP configuration
When the backbone routers of each company were interconnected, as
illustrated in Figure 10.3, the Company A routers did not automatically
learn the routes from the Company B routers, nor vice versa. A common mis-
conception is that if the router joining two networks runs both routing pro-
tocols, then route redistribution will just happen--this is not so.
Network A
EIGRP - Process ID 10
Router eigrp 10
network 1.0.0.0
network 2.0.0.0
network 3.0.0.0
network 4.0.0.0
Internet
3.3.3.0/24
1.1.1.0/24
2.2.2.0/24
4.4.4.0/24
Network B
RIP
Router rip
network 5.0.0.0
network 6.0.0.0
network 7.0.0.0
network 8.0.0.0
Internet
6.6.6.0/24
8.8.8.0/24
5.5.5.0/24
7.7.7.0/24
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