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Windows Server 2012 Thread, Backup domain controller not allowing stations to logon Server 2012 in Technical; Hi! I think I'm being dumb, I have a test setup of a DC 2012 and then created a second ...
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    itdirectorscut's Avatar
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    Question Backup domain controller not allowing stations to logon Server 2012

    Hi!

    I think I'm being dumb, I have a test setup of a DC 2012 and then created a second server (2012) and promoted it to become a replica domain controller (AD, DNS and DHCP) HOWEVER if I switch off the PDC workstations are unable to logon (no logon servers available) I have checked and they do get a IP from the SDC, am i missing something obvious??

    Thanks!!

    Steve

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    is dhcp dishing out the 2nd dcs ip as a dns server?

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    itdirectorscut's Avatar
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    Quote Originally Posted by sted View Post
    is dhcp dishing out the 2nd dcs ip as a dns server?
    Hi, ok after trying a windows 7 host it does logon but take a very long time, is this normal? I was testing it with server 2012 which showed up the 'no logon servers available'!

    thanks!!

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    Quote Originally Posted by itdirectorscut View Post
    Hi, ok after trying a windows 7 host it does logon but take a very long time, is this normal? I was testing it with server 2012 which showed up the 'no logon servers available'!

    thanks!!
    have you got verbose turned on so you can see where its hanging? I suspect its stuck trying to do folder redirection or profiles to a non existent server

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    RobBaxter's Avatar
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    You need to migrate the PDC roll ...

    Currently, the PDC Service Roll acts as a kinda "broker". If the PDC is "down" you can take this role forcibly from any other Server with AD on it.

    So ... in the event of a PDC Master problem, you would take control of this roll to another DC.

    Your 4 main service rolls allways have a "master", most don't require the master to be present, but the PDC does, this is integral to password replication.

    Move your PDC to the 2012 server before you shutdown the old server and it should work. Once you test is over, move it back.

    (at least, that was what i learnt doing my MCITP EA Cert for 2008 r2, it is possible it changed with 2012, just a head up, i very well could be wrong) ... note to self ... refresh my certs
    Last edited by RobBaxter; 16th October 2013 at 07:55 PM.

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    Quote Originally Posted by RobBaxter View Post
    You need to migrate the PDC roll ...

    Currently, the PDC Service Roll acts as a kinda "broker". If the PDC is "down" you can take this role forcibly from any other Server with AD on it.

    So ... in the event of a PDC Master problem, you would take control of this roll to another DC.

    Your 4 main service rolls allways have a "master", most don't require the master to be present, but the PDC does, this is integral to password replication.

    Move your PDC to the 2012 server before you shutdown the old server and it should work. Once you test is over, move it back.

    (at least, that was what i learnt doing my MCITP EA Cert for 2008 r2, it is possible it changed with 2012, just a head up, i very well could be wrong) ... note to self ... refresh my certs

    He is not doing a migration he is testing in the event he looses a DC. In theory things should carry on as normal.

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    RobBaxter (16th October 2013)

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    Damn good point!

    In which case ... most likely... it's GPO references to the server which is off, stalling out the logon as @sted said.

    Sorry if i gave bad advice

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    Is the second DC also a global catalogue?

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