DHCPv6 client in Windows 10 broken after anniversary update

[Mikael Abrahamsson]

So I did some more investigation. I had missed that I needed to use 
/renew6 and /release6 before.

Now I have 10 minute lease time.

5 minutes into the lease time, I can /renew6 the lease successfully and 
get 10 more minutes leasetime.

around 2-3 minutes before the lease-time expires I see that Win10 has 
marked the IA_NA as (deprecated), I try to do "/renew6" I get the 
following error:

"An error has occured while renewing interface Ethernet: The semaphore 
timeout period has expired".

This renew fails. If I now ctrl-c this /renew6 and run /renew6 again, the 
renew succeeds and the address is back again as (preferred) and the lease 
time is 10 minutes.

I also have a Ubuntu 16.04 box that won't keep its lease either... so I 
don't know what's going on. Will look further.

Harald, what DHCPv6 server are you using?

-- 
Mikael Abrahamsson    email: swmike at swm.pp.se