W2K3 - Forwarders/Root Hints

Discussion in 'DNS Server' started by Tony Scarola, Nov 8, 2004.

  1. Tony Scarola

    Tony Scarola Guest

    I am planning our W2K3 implementation. I've reviewed the postings and see
    many people using forwarders instead of strictly root hints for public name
    resolution. Due to the way both work, I assume that using forwarders is the
    way to go due to the ISPs cache and faster resolution. I am curious,
    however, if the ISPs DNS servers go down for any reason, would name
    resolution fail for my clients or will W2K3 DNS fall back to using root
    hints? (We are lucky in that we are pointing to two ISPs, each having two
    DNS servers, so four servers would have to be down before the lookups fail,
    but I am still curious how this would work.)

    Does anyone know?

    Tony
     
    Tony Scarola, Nov 8, 2004
    #1
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  2. Mark Renoden [MSFT], Nov 8, 2004
    #2
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  3. Tony Scarola

    Tony Scarola Guest

    Yes it does. Here it is again (for those who might not want to follow the
    link):

    1.. When the DNS server receives a query, it attempts to resolve this
    query using the primary and secondary zones that it hosts and its cache.
    2.. If the query cannot be resolved using this local data, then it will
    forward the query to the DNS server designated as a forwarder.
    3.. The DNS server will wait briefly for an answer from the forwarder
    before attempting to contact the DNS servers specified in its root hints.
    Regards,
    Tony

     
    Tony Scarola, Nov 8, 2004
    #3
  4. TS> Here it is again (for those who might not want to follow the link):

    I suggest that people follow the link and read the product documentation
    - the *whole* product documentation. The excerpt that you posted is
    misleading by itself.
     
    Jonathan de Boyne Pollard, Nov 9, 2004
    #4
  5. Tony Scarola

    Tony Scarola Guest

    I agree that the entire document should be read, but what part of what I
    posted do you think is misleading? I thought it was pretty clear myself. (At
    least it answered my questions.)
     
    Tony Scarola, Nov 9, 2004
    #5
  6. TS> Here it is again (for those who might not want to follow the link):

    JdeBP> I suggest that people follow the link and read the product
    JdeBP> documentation - the *whole* product documentation. The excerpt
    JdeBP> that you posted is misleading by itself.

    TS> I agree that the entire document should be read, but what part of
    TS> what I posted do you think is misleading? I thought it was pretty
    TS> clear myself.

    I didn't say unclear. I said misleading. It's misleading because, of
    course, what you posted is *not* necessarily what happens. From reading
    the whole product documentation, one will understand why.

    TS> (At least it answered my questions.)

    But it did so misleadingly. The correct answer to your question was the
    one that I gave at the beginning of this thread.
     
    Jonathan de Boyne Pollard, Nov 12, 2004
    #6
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