Example Concept: In a hybrid OSPF–BGP environment, routing loops can occur when a route learned from OSPF is redistributed into BGP and then inadvertently reintroduced into OSPF. This happens if the redistributed route lacks proper tagging or filtering, causing OSPF to see it as a new route and potentially prefer it over the original path. To prevent this, route tagging, careful metric manipulation, and route maps or prefix lists should be used to ensure that routes do not re-enter their originating protocol without proper checks.