ute into OSPF 100. R2 now has an entry for 50.50. 50.0.24 in the OSPF database as well as the EIGRP topology table. Because the route was originally redistributed into EIGRP, it has an administrative distance of 170 when it gets to R2. R2 advertises the router to R1 via OSPF, which has an adminis- trative distance of 110. So, even though R1 has also learned of the route from R3, where it originated, it will prefer the route from R2 because of the more attractive administrative distance. Here are the IP routing tables from each router. Router R1 has learned the route for 50.50.50.0/24 from router R2 via OSPF: R1# sho ip route [text removed] Gateway of last resort is not set 50.0.0.0/24 is subnetted, 1 subnets 50.50.50.0 [110/10] via 10.10.10.2, 00:16:28, FastEtherneto/o 20.0.0.0/24 is subnetted, 1 subnets 20.20.20.0 is directly connected, FastEtherneto/1 10.0.0.0/24 is subnetted, 1 subnets 10.10.10.0 is directly connected, FastEtherneto/o R2 has learned the route from EIGRP as an external route from R3. The route is external because it was originally redistributed into EIGRP on R3: R2# sho ip route [text removed] Gateway of last resort is not set 50.0.0.0/24 is subnetted, 1 subnets 50.50.50.0 [170/156160] via 20.20.20.3, 00:17:30, FastEtherneto/1 20.0.0.0/24 is subnetted, 1 subnets 20.20.20.0 is directly connected, FastEtherneto/1 10.0.0.0/24 is subnetted, 1 subnets 10.10.10.0 is directly connected, FastEtherneto/o R3 shows only its two connected routes and the network from the OSPF side, as it was redistributed into EIGRP on R2: R3# sho ip route [text removed] Gateway of last resort is not set 50.0.0.0/24 is subnetted, 1 subnets 50.50.50.0 is directly connected, Loopback0 20.0.0.0/24 is subnetted, 1 subnets 20.20.20.0 is directly connected, Ethernet1/0 10.0.0.0/24 is subnetted, 1 subnets 10.10.10.0 [170/537600] via 20.20.20.2, 00:00:15, Ethernet1/0 Redistribution Loops The key to this example lies in the fact that EIGRP has a higher administrative dis- tance for external routes (170) than it does for internal rou