To add a converged node to an existing Cisco HyperFlex standard cluster, the Cisco HyperFlex Installer is used. The Cisco HyperFlex Installer automates the deployment and expansion of HyperFlex clusters, including adding new converged nodes. It simplifies the provisioning of compute, storage, and networking resources in the HyperFlex environment. The installer ensures the new node is properly integrated into the cluster with the correct configuration and policies.