You have configured your settings file to download from the non-existent "xxx.com" domain.
Good news is that you don't need a settings file at all, by default ivy will download from the Maven Central repository.
Bad news is that there is no 1.3.2.RELEASE version of the spring-ldap artifact:
The following ivy file works:
<dependency org="org.springframework.ldap" name="spring-ldap-core" rev="1.3.2.RELEASE" conf="compile->default"/>
<dependency org="org.springframework.ldap" name="spring-ldap" rev="1.3.1.RELEASE" conf="compile->default"/>