Does an IPv6 address interact with an IPv4 network?

Gloria Gu 3,891 Reputation points
2020-07-15T02:14:36.543+00:00

Sorry guys, these are probably stupid questions, my knowledge of IPv6 is quite limited.

Question 1: If I translate my current IPv4 address (e.g. 192.168.45.1) to IPv6 and use that as my IPv6 address, will there be a IP address conflict, or are the two protocols completely different, as in on completely different networks?

Background: We have an issue where when the server reboots the DHCP assigned IPv6 address changes (it is actually the Link Local Address), which then makes some of the bespoke software think it has been installed on a second server and we get licensing issues. Our DHCP server (a router) doesn't doesn't actually do IPv6 so I need to set it as static on the server. I can't set it as the current IPv6 address as it is currently using the Link Local Address and won't accept this as a valid static IP address. Converting an IPv4 address in the same network to IPv6 gives me a valid IPv6 address, but I can't reserve it on the router for the reason above (router won't do IPv6 and it requires a MAC address to link to the IPv4 address which is already in use).

Question 2: Is there a good default IPv6 address that I should use?

Yes, I'm probably doing this all wrong, please help.

Thread source link:https://social.technet.microsoft.com/Forums/zh-CN/886cb956-2dce-42a0-bb6d-30bf457c39be/does-an-ipv6-address-interact-with-an-ipv4-network?forum=ipv6

Windows Server
Windows Server
A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.
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Accepted answer
  1. Candy Luo 12,646 Reputation points Microsoft Vendor
    2020-07-15T03:10:35.623+00:00

    Hi ,

    Welcome to our new Microsoft Q&A Platform.

    • IPv6 and IPv4 are different and incompatible systems, you are running a 'dual stack' and your OS will try one then the other - typically 6 and then 4. If a site has a AAAA record, and you have a dual stack setup, you will typically connect to ipv6 first then ipv4.
    • Three main options are available for migration to IPv6 from the existing network infrastructure: dual-stack network, tunneling, and translation.

    Please refer to the link below:

    https://www.cisco.com/c/en/us/products/collateral/ios-nx-os-software/enterprise-ipv6-solution/white_paper_c11-676278.html

    Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.

    Best Regards,

    Candy

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