 Also in 862, Cerball is reported to have defeated a Norwegian fleet under one Rodolb, although it is not clear that this is the same Rodolb who was defeated in 855.In 864 the "Fragmentary Annals of Ireland" report that the men of Leinster and their Norse allies raided Osraige in revenge for Cerball's raid, and that Eóganachta of Munster took advantage of this to attack him, so that Cerball raided both his neighbours and caused much destruction.The same year he is said to have attacked the neighbouring Déisi.