[Samba] Failover DC did not work when Main DC failed

Paul Littlefield info at paully.co.uk
Mon Feb 3 12:25:20 UTC 2020

On 03/02/2020 07:15, Kris Lou via samba wrote:
> Unless it's_not_  a global catalog.  Check your SRV records again, there
> should be corresponding "_gc" records (similar to "_ldap") for each DC.
> So, based upon the link/graphic I posted earlier:
> * either your 2nd DC isn't being returned as a part of DNS lookups
> * or that 2nd DC isn't responding to queries for authentication
> * or the client isn't storing/retrieving the 2nd DC's availability for
> future lookups
> ** could be related to DNS? storage via registry-equivalents? no idea here,
> but putting it as "client side"
> FWIW, I checked my file server (winbind, not sssd):
> * checked the logonserver (which DC it was authenticating against)
> * stopped samba on that DC
> * checked logonserver again -- and it had switched to a different one.  So
> 4.10 Louis winbind works (for me).
> Kris Lou
> klou at themusiclink.net

Thanks Kris for your helpful and full information (yay).

I shall check, test and debug!



Paul Littlefield

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