local subnet6="$(printf "%s:%x::1/64" "$prefix6" $adv_subnet)"
logger -t "$link" " * Advertising IPv6 subnet $subnet6 on ${adv_interface:-lan} ($adv_ifname)"
ip -6 addr add $subnet6 dev $adv_ifname
local subnet6="$(printf "%s:%x::1/64" "$prefix6" $adv_subnet)"
logger -t "$link" " * Advertising IPv6 subnet $subnet6 on ${adv_interface:-lan} ($adv_ifname)"
ip -6 addr add $subnet6 dev $adv_ifname