WHM error while adding IP address – Skipping xxx.xxx.xxx.xxx already added

Recently, I faced a problem to add an IP address from WHM. I received the following error while adding an IP address:

All Requested Ips were already active
System has 0 free ips.
Skipping xxx.xxx.xxx.xxx .. already added
But when I checked in IP Functions -> Show/Edit Reserved IPs, it was not listed in it. To resolve this I followed the below steps:

[1] Checked chkconfig for ipaliases:
I checked chkconfig for ipaliases and it was on for 2, 3, 4, 5.

chkconfig --list ipaliases

[2] Restarted ipaliases service:
After checking chkconfig, I restarted ipaliases service using following command:

/etc/init.d/ipaliases restart

This did the trick and all IP addresses were displaying again on Show/Edit Reserved IPs page.

– Kailash Aghera