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General Chat Thread, Why does 1 computer out of 9 behave differently :) in General; STAFFLAPAP is still falling off the domain - has anyone any ideas why? DNS is fine, laptop has been re-imaged ...
  1. #16

    witch's Avatar
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    STAFFLAPAP is still falling off the domain - has anyone any ideas why? DNS is fine, laptop has been re-imaged (twice)

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    FishCustard's Avatar
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    When you say falling off, do you mean giving errors like 'the trust relationship between this computer and the primary domain has failed blah blah', or is it actually reverting to being in a workgroup?

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    witch's Avatar
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    @FishCustard Trust relationship etc etc

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    We found that the main cause trust relationship errors here was a mismatch of DNS scavaging cycles and lease times, it also caused non-genuine windows errors through KMS

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    Quote Originally Posted by Mouse77e View Post
    Hmmmm would it be too simplistic to just buy a Mac?
    Yes it would be too simplistic, they do strange things too.

    Rob

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    witch's Avatar
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    Quote Originally Posted by HaleStorm View Post
    We found that the main cause trust relationship errors here was a mismatch of DNS scavaging cycles and lease times, it also caused non-genuine windows errors through KMS
    @HaleStorm - explain please?
    The odd thing is that we have the odd one fall off the domain here and there but this is CONSTANTLY this one machine which is why I cleaned up the DNS records - anything else I should do?

  7. #22

    twin--turbo's Avatar
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    have you checked for a duplicate machine with the same name, that's 99% of the times we see laptops falling off domains. ( although usualy we have alternate staff comming in )

    Rob

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    witch's Avatar
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    Quote Originally Posted by twin--turbo View Post
    have you checked for a duplicate machine with the same name, that's 99% of the times we see laptops falling off domains. ( although usualy we have alternate staff comming in )

    Rob
    No duplicates - have checked

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    We found it was normally laptops, and checking back on Parago and SCCM there last check its were generally after the 4day lease time we have set (i dont know why its set at 4days) but DNS scavaging was set to 7days. So machines were being turned on saying "look here is my MAC address give me a new lease" and the server was reportgin back "you've already got one but I cant find it"

    Other than forcing a DNS purge and matching up the lease times there isn't much that can be done from what i've read and been told by our senior techs.
    Splitting our Wi-Fi across 2 VLANs helped having 1 scope for teacher wireless and 1 scope for student wireless and a seperate scope for "guest devices" alot of issues were caused by student devices (phones etc) latching onto to the student wifi and taking up addresses and stuff.

  10. #25


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    i suspect trust relationship is due to the user running the startup repair crap. Run this batch file (or manually) on their pc and hopefully it will stop

    Code:
    bcdedit /set {default} bootstatuspolicy ignoreallfailures

  11. Thanks to sted from:

    witch (18th July 2013)

  12. #26
    ricki's Avatar
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    Hi

    We had the problem quite a few times when we moved from xp to 7. We found a lot of it was due to either
    Slightly different hardware ie model different of motherboard.
    Problems with hardware ie hard drives or ram
    It took us a bit to solve the problems but got rid of network problems we were living with.
    The other thing we found was different setting in bios which we has to reset and sometimes flash the bios.
    Things like pxe or hyperv would not talk to hardware.

    Richard

  13. #27
    BKGarry's Avatar
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    @witch,

    Dropping off the domain, if this is it keeps on going back to only having a local login, it is usually because they do not shut down the machine properly, or it errors, then they just leave it to boot into recovery mode and then it restores to a time before system restore was disabled on the image. We had 3 members of staff who this would always "happen" to so we made sure all system restore images have been destroyed, now we don't have the issue :-)

  14. #28

    witch's Avatar
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    Quote Originally Posted by BKGarry View Post
    @witch,

    Dropping off the domain, if this is it keeps on going back to only having a local login, it is usually because they do not shut down the machine properly, or it errors, then they just leave it to boot into recovery mode and then it restores to a time before system restore was disabled on the image. We had 3 members of staff who this would always "happen" to so we made sure all system restore images have been destroyed, now we don't have the issue :-)
    Nope, not in this and other laptop cases. That is certainly the case on the netbooks but definitely not here (I have shut down the machine myself and the next day it has dropped off the domain again)

  15. #29
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    I have a hammer here that may help with your issue with this laptop.

    I would resort to reinstalling the machine with a different name and see if it happens then.

  16. #30

    witch's Avatar
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    yeah, might just do that

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