Is performing ghusl for ihram sufficient for ghusl from janabah, even if the intention for janabah was not made?

The ritual bath of ihram (consecration for pilgrimage) is sufficient for the ghusl (ritual bath) of janabah (major ritual impurity), because it is a prescribed ghusl, especially in cases of forgetfulness. So, if one intends a supererogatory bath, it suffices for an obligatory one.