On the Internet, routers forward data packets between computer networks.
[1][2] In order for a router to determine where to forward each packet, it may use: In a small network such as a home or home office, a default route is often used to send all traffic to the user's Internet service provider.
Likewise, medium-sized networks such as branch offices or small Internet service providers may use default routes for traffic intended for the public Internet.
But the portion of the network whose routes are learned by redistribution are not "mapped" in the same way.
The chance of loops is increased if there are more than one router that performs redistribution in the same network, and if redistribution occurs in both directions (for example, both from EIGRP into OSPF and from OSPF into EIGRP).