[Samba] Samba4 Secondary DC as Backup DC (redundancy)

[Daniel Carrasco Marín]

Hi,

I've sucessfull created a secondary DC using the wiki manual (
https://wiki.samba.org/index.php/Join_a_domain_as_a_DC), and is working
perfectly, user and groups are synced on both and I can use any of them for
login using clients like Owncloud, Prosody, python scripts...

Now my question is: ¿how I can use that secondary DC as backup when the
main fails?.

I've tried to disable the main AD daemon but clients don't try to connet to
secondary DC, then all fails...

Greetings and Thanks!!