In response to comment #1, isn't that contradictory? Is there something specific within IPv6 that didn't exist in IPv4, as IPv4 also allowed an interface to be assigned multiple addresses? If aliases aren't necessary, how can multiple addresses (either IPv4 and IPv6 or multiple IPv6) be assigned through /etc/network/interfaces?
In response to comment #1, isn't that contradictory? Is there something specific within IPv6 that didn't exist in IPv4, as IPv4 also allowed an interface to be assigned multiple addresses? If aliases aren't necessary, how can multiple addresses (either IPv4 and IPv6 or multiple IPv6) be assigned through /etc/network/ interfaces?