EIGRP has no command to inject a default route into the routing table so there are only two methods by which you can install one into EIGRP:
- Redistribute the default route from another routing source
- Manually summarize a default route to all neighbors
If a static default route is configured without a next hop interface and you configure a network command with 0.0.0.0 IOS will think the route is directly connected and advertise it out to neighbors. Â However, this will also cause EIGRP to advertise out all directly connected interfaces, this could be a non desirable behavior and as such is never a good idea to advertise the default route in such a way.