EC2 > Structures > Phase1DHGroupNumbersRequestListValue Phase1DHGroupNumbersRequestListValue¶ Structure Class¶ Phase1DHGroupNumbersRequestListValue dataclass ¶ Bases: _SerdeShape Specifies a Diffie-Hellman group number for the VPN tunnel for phase 1 IKE negotiations. Attributes¶ value class-attribute instance-attribute ¶ value: int | None = ... The Diffie-Hellmann group number.