Does IPAM even belong in the holistic DCIM?

Yes, because IPAM is important for the entire data center operation because

• the network is the basis of all communication and processes in the data center / company
• IP addresses / hostnames needed for identification in a holistic troubleshooting process
• IP addresses for configuring active components include
• Reservation pools and an overview of address assignments are extremely helpful for planning and avoiding bottlenecks

Conversely, IPAM itself also requires sub-disciplines of DCIM, such as.

• Mass operations and work orders from Process Management
• Customer-based billing and relationships from Business Service Management (BSM)
• Standardized interfaces and ETL mechanisms for the integration of DDI tools
• Relationships with objects from other management areas for the organization of the new network structures