Figure 11-6 shows a network with three routers. R3 has a network attached that is being advertised in EIGRP 100 by way of the redistribute connected command (50.50.50.0/24). R1 is redistributing from OSPF into EIGRP (from left to right in the figure), and R2 is redistributing from EIGRP to OSPF (from right to left in the figure). Redistribute connected OSPF 100 Area 0 EIGRP 100 Figure 11-6. Redistribution loop The network 50.50.50.0/24 will be advertised from R3 to R1 and R2 through EIGRP. R2 will in turn redistribute the route 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 route to R1 via OSPF, which has an administrative 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. Redistribution Loops 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 O