NSLOOKUP unable to resolve domain name

Discussion in 'DNS Server' started by Amarnath, Jul 15, 2009.

  1. Amarnath

    Amarnath Guest


    We have total 24 dc's (domain contollers with AD and DNS integrated)
    and their naming conventions are as follows: uk.ab.yz.com

    all the above dc's are child dc's

    and also we have other child dcs's (naming conventions as ca.ab.yz.com

    when i try to do nslookup for ca.ab.yz.com from uk.ab.yz.com unable to
    resolve the name (>nslookup ca
    Server: dc01.uk.ab.yz.com

    DNS request timed out.
    timeout was 2 seconds.
    *** Request to dc01.uk.ab.yz.com timed-out)

    Please help me to resolve this issue.

    advance thanks.
    Amarnath, Jul 15, 2009
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  2. That's because when you input "ca," nslookup relies on the operating
    system's Search Suffix. So if you expect it to resolve something out of the
    zone on ca.ab.yz.com, the Search Suffix "ab.yz.com" must exist.on the
    machine you are running nslookup on.

    This also indicates you are trying to resolve the LdapIpAdress of the child
    domain ca.ab.yz.com and should return an IP for each DC in that domain.

    In a multi domain forest, the best way to setup your DNS resolution
    infrastructure is the use of Parent-Child delegation, then set a forwarder
    from the child domain to the parent, and for all other child domains, to set
    a Search Suffix for the other child domains that you want them to be able to

    I hope that makes sense and helps.


    This posting is provided "AS-IS" with no warranties or guarantees and
    confers no rights.

    Please reply back to the newsgroup or forum to benefit from collaboration
    among responding engineers, and to help others benefit from your resolution.

    Ace Fekay, MCT, MCSE, MCSA 2003 & 2000, MCSA Messaging
    Microsoft Certified Trainer


    For urgent issues, you may want to contact Microsoft PSS directly. Please
    check http://support.microsoft.com for regional support phone numbers.
    Ace Fekay [MCT], Jul 15, 2009
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  3. Amarnath

    Amarnath Guest

    Thanks for your reply.

    Amarnath, Jul 15, 2009
  4. You are welcome.

    Did it help resolve the issue?

    Ace Fekay [MCT], Jul 16, 2009
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