Chassis groups are defined in OME-M. Before a chassis group can be created, the chassis PowerEdge MX9002m modules must be cabled together.
For details on cabling the management modules for multi-chassis deployments, see the Managing chassis section in the Dell EMC OpenManage Enterprise-Modular Edition for PowerEdge MX7000 Chassis User Guide. Cabling diagrams can also be referenced in the Dell EMC PowerEdge MX Networking Deployment Guide.
For details on creating chassis groups, see the Chassis groups section in the Dell EMC OpenManage Enterprise-Modular Edition for PowerEdge MX7000 Chassis User Guide.