According to William of Jumièges he had to quell dual rebellions in 996, of peasants and nobility; against the former he cut off feet and hands.. He arrested the chief aristocratic rebel Guillaume, comte d'Exmes.
The counts of the duchy of Normandy were in place from around the year 1000; Rodulf is the first whose title can be attested by a document (of 1011). Pierre Bauduin following David Bates states that territorial designations for these titles came in only in the 1040s.. Contemporary sources, and Dudon de Saint-Quentin , speak only of Rodulf as "count", never "of Ivry"; this is found only in later writers. Ordericus Vitalis, for example, calls him count of Bayeux. Historians now consider this erroneous, following the later Robert de Torigni, who makes Rodulf count of Ivry.
In strategic terms, Ivry was on the boundary of the duchy of Normandy, by an important crossroads on a roman Road, by the valley of the River Eure. Over some decades the Normans had struggled there against the forces of the county of Blois, after its control had reached Dreux. This position mattered for the assertion of domination of the south-east of the Évrecin.
He married Eremberga, who died before 1011, then Aubrée de Canville. His children were