TLS with multiple LDAP servers

[Julien Courtès <julien.courtes@yooda.com>]

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