Refresh Interval Question

Discussion in 'DNS Server' started by Buck Turgidson, May 21, 2010.

  1. According to Microsoft, "The refresh interval is used to determine how often
    other DNS servers that load and host the zone must attempt to renew the
    zone."

    If I have a AD-integrated zone that is transferred to three other servers,
    and those servers are set to something other than to default of 15 min,
    which one takes precedence?

    I probably have a fundamental misunderstanding of how it works, but aren't
    these zones all authoritative, and are peers?

    Thanks for clearing up my confusion.
     
    Buck Turgidson, May 21, 2010
    #1
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  2. Buck Turgidson

    Chris Dent Guest

    AD Integrated zones are replicated through Active Directory rather than
    AD so the Refresh in the SOA won't apply except when a Secondary server
    is transferring from *one* of those Primary servers.

    I highlight one because a Secondary can only have one Primary, and since
    that is true the Secondary must obey the Refresh Interval set on the
    Primary it talks to (regardless of the setting on any other servers that
    may host the zone).

    A Secondary cannot have a different value for the Refresh from the
    Primary simply because the Secondary zone is a direct copy of a Primary.

    It is perhaps worth noting that with the AD Integrated model all servers
    host a Primary copy of the zone. That's why they are allowed to have
    individual SOA (Start of Authority) records.

    Chris
     
    Chris Dent, May 21, 2010
    #2
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