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Can't Add IPv6 to a NIC

Jessica Espada 20 Reputation points
2025-03-31T13:19:13.6233333+00:00

I tried to use Copilot to help with the error but it could not remember things I already said and was just talking in a loop.

I have a virtual network that already has both IPv4 and IPv6 applied. I have a Nic applied to a VM that has a single IPv4 address on it and I want to add an IPv6 address. The error I am getting makes no sense. It says:

  1. To check the network interface to make sure it does not have an IPv6 configuration that is part of an availability set with a load balancer. 
                   I checked and there is no load balancer in front of the VM and it is not a part of an availability set. 
   ```2.Update Load Balancer rules  
                 Again there is no load balancer
  2. Modify Availability set associations
         Again there is no availability set. 
```I even tried to stop the VM and I get the same error. Why can't I apply an IPv6 address to this NIC?
Windows Network
Windows Network
Windows: A family of Microsoft operating systems that run across personal computers, tablets, laptops, phones, internet of things devices, self-contained mixed reality headsets, large collaboration screens, and other devices.Network: A group of devices that communicate either wirelessly or via a physical connection.
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  1. Daisy Zhou 32,461 Reputation points Microsoft External Staff
    2025-04-02T02:31:31.5066667+00:00

    Hello Jessica Espada,

    Thank you for posting in Q&A forum.

    If you are using Windows VM, you can add IPv6 addresses with following steps:

    1. Open Network Connections:

    Press Win + R, type ncpa.cpl, and hit Enter.

    1. Select the Network Adapter:

    Right-click on the network adapter you want to configure and choose Properties.

    1. Add IPv6 Address:

    Find and select Internet Protocol Version 6 (TCP/IPv6) and click Properties.

    Choose Use the following IPv6 address and fill in the IPv6 address, subnet prefix length, and default gateway.

    If you need to, enter the preferred and alternate DNS server addresses.

    Click OK to save your changes.

    1. Verify Configuration:

    Open Command Prompt and run ipconfig to make sure the IPv6 address has been added.

    Please note:

    1. Make sure your firewall rules allow IPv6 traffic.
    2. If your network uses a router, ensure it's set up to handle IPv6 traffic.

    I hope the information above is helpful.

    If you have any questions or concerns, please feel free to let us know.

    Best Regards,

    Daisy Zhou

    ============================================

    If the Answer is helpful, please click "Accept Answer" and upvote it.

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