TLS with multiple LDAP servers

Hi, I have two LDAP servers in master-slave ldap1.domain.com - master ldap2.domain.com - slave These servers got different ip addresses and are hosted on different servers But I want to enable TLS connection with clients. So can I create a unique certificate that I put on both servers and the client will use one unique certificate to connect to server "ldap1" or "ldap2" if the first one is down.

If not, how should I do? I did a search and I found that I can use subjectAltNames or wildcard certificat.

Thanks

Julien Courtès