How to configure a Windows Server 2008 DHCP server using an IPv6 scope to register clients in DNS when requested

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Source: Microsoft Support

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This article describes the options that must be configured in order for a Windows Server 2008 DHCP using an IPv6 scope server to register on behalf of a client with DNS.

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In order for a Windows Server 2008 DHCP server using an IPv6 scope to register on behalf of a client with DNS, there are two options that need to be configured (either at the scope or server level).

 

1.       Option 23 - DNS Recursive Name Server IPV6 Address List

2.       Option 24 - Domain Search List

 

If these options are not configured, you may find that even when a client requests the server register on its behalf, that registration never occurs.  Viewing the requests in a network trace will show in the final packet of the DHCP exchange that the server overrides the client request for registration.

 

Example:

 

Client flag values:

    - Flag: 1 (0x1)

       MBZ: (00000...) 0

       N:   (.....0..) DHCPServer SHOULD perform updates (the PTR RR and possibly the AAAA RR based on the 'S' bit)

       O:   (......0.) the server has not overridden the client's preference for the 'S' bit

       S:   (.......1) SHOULD perform the AAAA RR (FQDN to address) DNS updates

 

Server response:

    - Flag: 6 (0x6)

       MBZ: (00000...) 0

       N:   (.....1..) DHCPServer SHOULD NOT perform the any DNS updates

       O:   (......1.) the server has overridden the client's preference for the 'S' bit

       S:   (.......0) SHOULD NOT perform the AAAA RR (FQDN to address) DNS updates

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Article ID: 961344 - Last Review: December 18, 2008 - Revision: 1.0
APPLIES TO
  • Windows Server 2008 Datacenter
  • Windows Server 2008 Enterprise
  • Windows Server 2008 Standard
Keywords: 
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