ACS aaa client can have a single hostname with more than one ip addresses, in this case, the first ip address will be imported for the hostname. viz. in acs if we have a host with name TESTDEVICE and ip addresses 10.10.10.1 and 10.10.10.2, while importing to DCA, we will import TESTDEVICE with ip 10.10.10.1 as DCA allows only one ip address for a given host.