After you have configured a new IPA replica, you should update your DNS entries so that IPA clients can discover the new server. For example, for an IPA replica with a server name of $HOST, you should add the following entries to your zone file:

_ldap._tcp             IN SRV 0 100 389	$HOST
_kerberos._tcp         IN SRV 0 100 88 $HOST
_kerberos._udp         IN SRV 0 100 88 $HOST
_kerberos-master._tcp  IN SRV 0 100 88 $HOST
_kerberos-master._udp  IN SRV 0 100 88 $HOST
_kpasswd._tcp          IN SRV 0 100 464 $HOST
_kpasswd._udp          IN SRV 0 100 464 $HOST
_ntp._udp              IN SRV 0 100 123 $HOST