I have a scenario where appliances running Debian may have multiple network interfaces. I want my eth0 interface to get its address via SLAAC configuration, but I want the remaining interfaces to only have their link-local or manually configured IPv6 addresses.
Is this possible?
I keep answering my own questions today!
Adding the following to the appropriate section /etc/network/interfaces does the trick, e.g. eth1:
pre-up /sbin/sysctl -w net.ipv6.conf.eth1.autoconf=0
Found answer here.
UPDATE: actually, that just disables the creation of an IPv6 IP address - it still gets, for example, default routes for that interface. To disable SLAAC on the interface altogether, apparently what you actually want is net.ipv6.conf.eth1.accept_ra=0