Please follow the below template, it will help us to help you!
Expected Behaviour:
DHCPv6 no longer works after upgrading to latest Debian Stretch from https://www.raspberrypi.org/downloads/raspbian/
Actual Behaviour:
If i put in my Debian 8 SD card the DHCPv6 works again, did they change something in Debian Stretch?
Debug Token:
ecuq2my3uo