For Windows Server 2008 domain controllers requiring static addressing, the IPv6 equivalent of private IPv4 ranges (192.168.x.x) would be fd00::/8 (Unique Local Addresses or ULAs). These are the IPv6 counterparts to IPv4 private address spaces.

Example ULA range: fd12:3456:789a::/64
Recommended format: fd[random 4 hex digits]:[random 4 hex digits]::/64

Follow these steps to manually configure IPv6:

1. Open Network Connections (ncpa.cpl)
2. Right-click the adapter → Properties
3. Select "Internet Protocol Version 6 (TCP/IPv6)" → Properties
4. Choose "Use the following IPv6 address"

Sample configuration:
IPv6 Address: fd12:3456:789a::1
Subnet prefix length: 64
Default gateway: (leave blank for internal networks)
Preferred DNS server: ::1 (or your DC's IPv6 address)

After configuration, verify with these commands:

ipconfig /all
netsh interface ipv6 show addresses
ping -6 fd12:3456:789a::1

When promoting to a domain controller with dcpromo:

• Ensure both IPv4 and IPv6 have static addresses
• The DNS server should point to itself (::1 for IPv6)
• Disable IPv6 auto-configuration if not needed:

reg add "HKLM\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters" /v DisabledComponents /t REG_DWORD /d 0x20 /f

If dcpromo still complains about dynamic addressing:

1. Verify all network adapters have static addresses
2. Check for APIPA addresses (fe80::)
3. Review DNS configuration for both IPv4 and IPv6
4. Ensure IPv6 is actually enabled in network adapter properties

In IPv4, private address ranges like 192.168.x.x (RFC 1918) are commonly used for internal networks. The IPv6 equivalent concept is Unique Local Addresses (ULAs) defined in RFC 4193. A ULA always begins with fd00::/8 and includes a randomly generated 40-bit Global ID.

For your test domain, you should generate a valid ULA prefix. Here's the recommended format:

fd[00-ff]:[4-digit-hex]:[4-digit-hex]:[4-digit-hex]::/64

Example of a properly generated ULA:

fd12:3456:789a::/64

Here's how to manually configure the IPv6 address through PowerShell:

# Set static IPv6 address
New-NetIPAddress -InterfaceAlias "Ethernet" -IPAddress "fd12:3456:789a::1" -PrefixLength 64

# Set DNS server (use same address if this is your DC)
Set-DnsClientServerAddress -InterfaceAlias "Ethernet" -ServerAddresses ("fd12:3456:789a::1", "127.0.0.1")

For legacy systems where PowerShell isn't available:

netsh interface ipv6 add address "Local Area Connection" fd12:3456:789a::1
netsh interface ipv6 add dnsserver "Local Area Connection" fd12:3456:789a::1

After setting the address, verify with:

ipconfig /all

Look for the "Ethernet adapter" section to confirm your static IPv6 address appears correctly.

When promoting to Domain Controller, ensure your IPv6 DNS settings are properly configured in Active Directory. The DC should point to itself for DNS resolution:

# For primary DNS
Set-DnsClientServerAddress -InterfaceAlias "Ethernet" -ServerAddresses @("fd12:3456:789a::1")

# For secondary DNS (if you have another DC)
Set-DnsClientServerAddress -InterfaceAlias "Ethernet" -ServerAddresses @("fd12:3456:789a::1", "fd12:3456:789a::2")

If dcpromo still complains about dynamic addressing:

1. Verify IPv6 is not set to "Obtain an IPv6 address automatically" in network adapter properties
2. Check if IPv6 router advertisements are disabled
3. Ensure there are no conflicting DHCPv6 servers on the network