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How to ensure with 110% certainty that DHCP is registering A Records in DNS...all of the time without fail. Please help. RRS feed

  • Question

  • Dear DHCP/DNS Experts,

    How can I ensure with 110% certainty that our DHCP servers are registering all clients' IP's in DNS, AND at no time, will any DNS records be deleted or go missing for any amount of time?   At the server scope level, I have the following options checked; please critique.

    Enable DNS dynamic updates according to the settings below:

    • Always dynamically update DNS records
    • Discard A and PTR records when lease is deleted
    • Dynamically update DNS records for DHCP clients that do not request updates (for example, clients running Windows NT 4.0)
    • Name Protection is DISABLED on this scope.  <--------------- Should I enable this?  If so, please explain why?

    We can't afford to have a single server lose it's DNS record, as we do not statically assign addresses, rather we rely on DHCP.

    Thank you so much in advance!

    Monday, November 13, 2017 5:25 PM

All replies

  • Hi guesthost,

    >>How can I ensure with 110% certainty that our DHCP servers are registering all clients' IP's in DNS, AND at no time, will any DNS records be deleted or go missing for any amount of time?   At the server scopelevel, I have the following options checked; please critique.

    Enable DNS dynamic updates according to the settings below:

    • Always dynamically update DNS records
    • Discard A and PTR records when lease is deleted
    • Dynamically update DNS records for DHCP clients that do not request updates (for example, clients running Windows NT 4.0)

    Yes, the above options are right. Generally, if you want to force DHCP register A records in DNS, we always choose the above options.

    >>Name Protection is DISABLED on this scope.  <--------------- Should I enable this?  If so, please explain why?

    As far as I know , you don't need to enable Name Protection.

    DHCP Name Protection allows you to protect the names that DHCP registers in DNS on behalf of DHCP clients from being overwritten by devices running non-Microsoft systems that may have the same name. DHCP name protection also protects the names from being overwritten by systems that use static addresses that conflict with DHCP-assigned addresses when DHCP is not configured for conflict detection. For example, a UNIX-based system named Client1 could potentially overwrite the DNS address that was assigned and registered by DHCP on behalf of a Windows-based system also named Client1.

    Best Regards,

    Candy


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    Tuesday, November 14, 2017 6:31 AM
  • Hi ,

    Just checking in to see if the information provided was helpful.

    Please let us know if you would like further assistance.

    Best Regards,

    Candy


    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Wednesday, November 15, 2017 8:43 AM
  • Hi guesthost,

    Was your issue resolved?

    If you resolved it using our solution, please "mark it as answer" to help other community members find the helpful reply quickly.

    If you resolve it using your own solution, please share your experience and solution here. It will be very beneficial for other community members who have similar questions.

    If no, please reply and tell us the current situation in order to provide further help.

    Best Regards,

    Candy


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    Thursday, November 16, 2017 8:20 AM
  • Hi guesthost,

    Was your issue resolved?

    If you resolved it using our solution, please "mark it as answer" to help other community members find the helpful reply quickly.

    If you resolve it using your own solution, please share your experience and solution here. It will be very beneficial for other community members who have similar questions.

    If no, please reply and tell us the current situation in order to provide further help.

    Best Regards,

    Candy


    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    No unfortunately not.  Actually, it happened again over the weekend where DHCP seemed to have dropped a lease and DNS record out of the blue and without explanation, causing an outage.   Any ideas as to where to look would be greatly appreciated.
    Monday, November 27, 2017 9:53 PM
  • Hi ,

    Did you configure Credentials and add the server to the DnsUpdateProxy group?

    As Ace Fekay said ,when you have Dynamic Updates enabled, you still need to configure Credentials and add the server to the DnsUpdateProxy group.

    For your reference:

    https://blogs.msmvps.com/acefekay/2016/08/13/dynamic-dns-updates-how-to-get-it-to-work-with-dhcp-scavenging-static-entries-their-timestamps-the-dnsupdateproxy-group-and-dhcp-name-protection/

    Best Regards,

    Candy


    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Tuesday, November 28, 2017 9:42 AM
  • Hi 

    If you do not have aging & scavenging activated I do not see any reason to lose your records

    some info regarding name protection:

    https://technet.microsoft.com/en-us/library/ee404786(v=ws.10).aspx

    www.sevenitblog.com


    • Edited by DhaliaMgR Tuesday, November 28, 2017 10:01 AM
    Tuesday, November 28, 2017 10:00 AM
  • Hi ,

    Did you have any updates?

    Best Regards,

    Candy


    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Wednesday, November 29, 2017 9:26 AM
  • Hi ,

    Was your issue resolved? 

    If you resolve it using your own solution, please share your experience and solution here. It will be very beneficial for other community members who have similar questions.

    If no, please reply and tell us the current situation in order to provide further help.

    Best Regards,

    Candy


    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Monday, December 4, 2017 9:42 AM