Fix DLPAR Issues After IP Address Change on AIX

To fix DLPAR (Dynamic LPAR) operation issues after changing IP addresses on HMC/LPAR systems by resetting the RMC (Resource Monitoring and Control) subsystem:

Fix DLPAR Issues After IP Address Change on AIX:

1: Check RMC daemon status
# lssrc -s ctrmc
Make sure the ctrmc daemon is running.
If not running or hung, proceed to restart the daemons.

2: Restart RMC daemons
# /usr/sbin/rsct/bin/rmcctrl -z # Stop all RMC daemons
# /usr/sbin/rsct/bin/rmcctrl -A # Start all RMC daemons
# /usr/sbin/rsct/bin/rmcctrl -p # Enable RMC daemons for remote client connections

3: Test DLPAR operations again
Try performing your DLPAR operation.
If still failing, proceed to next step.

4: Recreate RMC configuration database
# /usr/sbin/rsct/install/bin/recfgct
This deletes and rebuilds the RMC database and config.
It may briefly disrupt cluster and monitoring services; use with caution.

5: Verify RMC status and DLPAR operation again
# lssrc -s ctrmc
Confirm ctrmc is running.

Test DLPAR operation once more......................