This issue occurs, if we do initial configuration of the ACS SE without connecting the ACS SE in the active network i.e. without connecting the NIC of the ACS SE. We also need to ensure that we use the bottom NIC of the ACS SE for configuration of the device.
If you have not done much of the configuration on the Primary ACS SE, I would request you to re-image the Primary ACS SE using the recovery CD.
NOTE: This is a known issue and we are aware of it.
Please try setting the original ip address by using "Set ip" Command from the console connection of the ACS Solution engine. Once you successfully changed the ip address, you can apply the patch 11 or above (latest is patch 16) on the ACS SE (This will fix the problem).
In majority of cases set ip command fails but sometime works too.
In case it doesn't help then we have 2 options:
1.] Open a TAC case, send the database file to delete the entry.
2.] If you are not intrested sending your database then try the below listed steps:
In order to remove the loopback entry from the Database, we need to follow following steps,
Please download ACS 4.2 trial from following link, if you do not have ACS Full version for Windows purchased.
 Install eval version on Windows 2000/2003 server. Please also ensure that JAVA is installed on that server.
 Take a backup from ACS SE from, System Configuration > ACS Backup >Backup Now.
 Restore the database backup on ACS eval.
 On eval ACS , go to Network Configuration > find the AAA Server entry with 127.0.0.1 entry. Edit it and give it some other IP for
example, 188.8.131.52. Submit + Apply.
 On eval, Restart CSAdmin service.
 On eval, go back to Network Configuration and search for the changed IP address and delete that entry, Delete + Apply.
 Take a backup from eval ACS, System Configuration > ACS Backup > Backup Now.
 Restore the database backup from eval ACS into ACS SE from option, System Configuration > ACS Restore, choose the database backup. Check Check option "User and Group Database" and "CiscoSecure ACS System Configuration", then press Restore Now.
 On ACS SE, go to Network Configuration, make sure that 127.0.0.1 entry is not there and for ACS SE's hostname we have the correct IP address. Go to Proxy Distribution Table > (Default). Move the server’s hostname entry that has correct IP for this ACS SE into "Forward To" column, if not already. Then press "Submit + Restart".
CSCso36620 - Toggle nic command changes AAA server ip address to "127.0.0.1" in GUI.
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