Scenario 5-3: EIGRP and VLSM
This scenario demonstrates the capability of EIGRP to handle VLSM with a simple four-router topology.
Figure 5-4 displays the four-router topology along with the IP addressing scheme.
Figure 5-4. VLSM and EIGRP Topology
Four routers in Figure 5-4 reside in the same AS, so you do not need to configure any redistribution. Also, the Class A addresses, 10.1.1.0/25 and 10.1.1.128/25, are configured on the Ethernet interfaces on R3 and R4, respectively. VLSM is used on all four routers.
The Class A address, 10.0.0.0/8, is reserved for private use and not routable in the Internet.
Enable EIGRP in AS 1 on all four routers. ...
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