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When the ipv6 working mode of the superior router switches from slaac to stateful dhcpv6, Windows will lose the ipv6 address. I have tried many routers and network cards to solve this problem

薰 不见咲 0 Reputation points
2023-11-10T11:33:11.8766667+00:00

When the ipv6 working mode of the superior router switches from slaac to stateful dhcpv6, Windows will lose the ipv6 address. I have tried many routers and network cards to solve this problem. Why does Windows no longer request addresses after the router switches to stateful dhcpv6.

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  1. Wesley Li 10,415 Reputation points
    2023-12-27T08:17:30.3966667+00:00

    Hello,

    When the IPv6 working mode of the superior router switches from SLAAC to stateful DHCPv6, Windows will not automatically request addresses. This is because SLAAC (Stateless Address Auto Configuration) is a method for automatically configuring IPv6 addresses, while DHCPv6 (Dynamic Host Configuration Protocol version 6) is a request-and-response-based process for allocating and managing IPv6 addresses and other network configuration parameters.

    When the router switches from SLAAC to DHCPv6, it no longer automatically assigns addresses to connected clients. Therefore, if your Windows client is not configured with a static IPv6 address and relies on SLAAC to obtain an address, it may lose its IPv6 address when the router switches to DHCPv6 mode.

    To resolve this issue, you can take one of the following measures:

    1. Manually configure an IPv6 address: You can manually configure a static IPv6 address on your Windows system. This way, even if the router switches to DHCPv6, your Windows client can still retain its IPv6 address.
    2. Configure DHCPv6 client: You can configure your Windows to use DHCPv6 to obtain an IPv6 address. This way, when the router switches to DHCPv6, your client will be able to request and receive a new IPv6 address through the DHCPv6 protocol.
    3. Check router settings: Ensure that the superior router is correctly configured for DHCPv6. Check the router's documentation or contact your network administrator to ensure that DHCPv6 settings are correct and applicable for clients connected to the router.
    4. Update your Windows version or apply patches: Ensure that your Windows system is up to date or has applied the latest patches. Sometimes, operating system updates may include improvements and fixes for IPv6 to better accommodate new network configurations and protocols.

    Best Regards,

    Wesley

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