Descendents of UMich LDAP libraries generally take (where one LDAP server's DNS name is required) optional additional LDAP servers, if they're separated by spaces.
http://www.openldap.org/its/
--Quanah
-- Quanah Gibson-Mount Principal Software Developer ITSS/Shared Services Stanford University GnuPG Public Key: http://www.stanford.edu/~quanah/pgp.html