EC2 > Structures > Phase1DHGroupNumbersListValue Phase1DHGroupNumbersListValue¶ Structure Class¶ Phase1DHGroupNumbersListValue dataclass ¶ Bases: _SerdeShape The Diffie-Hellmann group number for phase 1 IKE negotiations. Attributes¶ value class-attribute instance-attribute ¶ value: int | None = ... The Diffie-Hellmann group number.