EIGRP - External routes from different ASes

When deploying EIGRP, if a router receives external routes from another EIGRP autonomous system (AS), then the route with the lowest Administrative Distance (AD) will be used. If the two EIGRP ASes have the same AD, then the route from the source with the lowest AS number is preferred.

For more information, take a look at how the routing table is populated.

Links:

https://forum.networklessons.com/t/eigrp-external-route-path-selection/1336/14?u=lagapidis

https://networklessons.com/eigrp/eigrp-external-route-path-selection