using short names for name resolution

Discussion in 'DNS Server' started by Willie Eckerslike, Dec 8, 2009.

  1. Hi,

    I am trying to troubleshoot short name resolution. My setup is as follows:

    Windows 2003 AD forest. All child DNS servers use forwarders pointing to the
    forest root DNS servers. We have no additional DNS suffixes in place.

    I am trying to resolve short name resolution for a server which is in a
    different child domain from my PC. This is what I am experiencing:

    My PC which is in child domain 2 uses DNS server NS2. NS2 has forwarders
    pointing to the forest root DNS server NS1. If I ping a sever in child domain
    3 using only short name:

    From my PC Ping server1. FAIL (server1.child3.root.local). Strangely, if I
    was to try to ping server1 from the DNS server which my PC points at (NS2)
    using only short name it is successful.

    From my DNS server NS2. (ns2.child2.root.local) Ping server1 PASS

    Obviously, if try to ping using FQN then this is successful. Short name
    resolution is working but not consistent. Some child servers can be resolved
    from other child domains but not all and yet all child DNS servers use the
    same forest root DNS servers as their forwarders.

    If I try to ping a different server in child 3 from my PC it is successful

    From my PC (pc.child2.root.local) Ping server2
    PASS (server2.child3.root.local)
    Willie Eckerslike, Dec 8, 2009
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  2. I assume this is a parent-child delegation.

    You will need suffixes on all the child domains for the other child domains.
    Ok, I'm confused wtih the naming structure. I asumed server1 would be in the
    parent domain following the naming paradigm you;ve been using up to this
    point, meaning that "1" is your parent, and "2" and "3" etc, are the child
    Basically to get DNS in a parent-child DNS delegation, all child DNS servers
    are delegated from the parent to the child domain DNS servers, there is a
    forwarder on each DNS server in the child domains pointing back to the
    parent, and the child members (all members, DCs, etc) have a suffix for the
    other child domains.

    If you need NetBIOS resolution, it should work using DirectSMB, however in
    many cases, some apps do not use DirectSMB such as some Exchange/Outlook
    functions, SQL and others that actually use NetBT, you may need to use WINS
    in the infrastructure.


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

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

    Ace Fekay, MCT, MCITP EA, MCTS Windows 2008 & Exchange 2007, MCSE & MCSA
    2003/2000, MCSA Messaging 2003
    Microsoft Certified Trainer

    For urgent issues, please contact Microsoft PSS directly. Please check for regional support phone numbers.
    Ace Fekay [MCT], Dec 8, 2009
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