DHCPv6 client in Windows 10 broken after anniversary update

Michael Oghia mike.oghia at gmail.com
Mon Oct 10 13:37:56 CEST 2016

Hi everyone,

Does anyone know if Microsoft is aware of this issue? Perhaps it can be
forwarded to someone who can pass it along to the engineers.


On Mon, Oct 10, 2016 at 11:28 AM, Trevor Warwick <twarwick at gmail.com> wrote:

> 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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