When you install and configure a dual Chassis deployment in high availability, make sure that all CMMs on each Chassis have the same Chassis ID.
The CMMs on Chassis 1 must include chassis_id 1 (SHMM_CHASSID=’1’).
The CMMs on Chassis 2 must include chassis_id 2 (SHMM_CHASSID=’2’).
Note - When you add a new CMM to a Chassis, you must validate the Chassis ID. Make sure that the Chassis is in the Standby mode when you do this.