On 21.01.2018 19:29, John Naggets wrote: > I was wondering if there is a "standard" way in Debian 9 through the > /etc/network/interfaces file to enable/force using a stable private > IPv6 address using SLAAC as specified in RFC 7217? no personal experience, but you should look at dhcpcd, with support for RFC 7217. AFAIK enabled in the default configuration. best regards Ulf