DHCPv6 client in Windows 10 broken after anniversary update

Trevor Warwick twarwick at gmail.com
Mon Oct 10 11:28:03 CEST 2016

I've think I've also seen this. To work around a bug in my Ubiquiti router
at home, I can't use SLAAC, so need to rely on DHCPv6 for address
assignment.  This weekend, a recently upgraded Windows 10 Anniversary
machine wasn't successfully getting an IPv6 address. Looking at it with
wireshark,IIRC, the client sent a Solicit, the server sent an Advertise,
but there was no Request from the client after that.

On 10 October 2016 at 09:14, Harald F. Karlsen <harald at bgp.no> wrote:

> Hi,
> It seems like Microsoft somehow broke DHCPv6 client functionality in the
> Windows 10 anniversary update and now neither stateful nor stateless DHCPv6
> functionality works unless you manually issue "ipconfig /renew6" (for
> stateful DHCPv6 this will only give you IPv6-connectivity untill the lease
> expires).
> This is generally not a big issue for dual-stacked residential customers
> as most CPEs does SLAAC on the LAN-side, but the Win10 clients will not
> recieve DNS from DHCP if the CPE is configured for that. For enterprise
> networks on the other hand this can be a big issue. Especially when running
> FHS and no SLAAC.
> Have anyone on the list experienced issues with this yet? If so, have you
> contacted Microsoft and what did they say? I've found reports on this issue
> dating back from early august so it's strange that Microsoft have not yet
> issued a fix for it.
> --
> Harald
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