RACRESET causes iDRAC and Chassis Management Controller (CMC) IP Address to change or re-order when using DHCP.

When executing a RACRESET command (RACADM RACRESET), the IP Address of the iDRAC and/or CMC may change when configured to use Dynamic Host Control Protocal (DHCP).  Integrated Dell™ Remote Access Controller (iDRAC) accepts whatever Ip Address is provided by the DHCP server.  It does not remember the old IP Address that was configured. 

This normal behavior for the standard DHCP protocol.  Similar behavior would occur for NICs configured with DHCP within Linux or Windows operating systems.