Hi,
We have a customer with 2 DC`s running Windows Server 2012 R2.
They said that if they shutdown DC1 then no one is able to login.
Then I tried it, but I seem to be able to login, one client did take some time, but was able to login at the end.
Since the customer is running VMware, I had a look into vCenter while the DC1 was shutdown, and there something strange happens. Several ESXi hosts suddenly appears as "Not responding", and then offcourse the VM`s running on these ESXi hosts gets disconnected. I was able to boot up the DC1 again, and the ESXi hosts where ok again.
To me this seems like a DNS issue or something else related to AD and not the configuration of the ESXi host?
I have looked into DNS on both servers, and could not find anything wrong except the subdomain called _msdsc within this directory only DC1 is recorded on both DC`s. My question then is should I add DC2 here also on both servers, what happens if this record is not there... could this be related ?
I have also check repadmin and dcdiag and both seem fine.
Thanks for reply
/Regards Andreas