Otherwise, it may happen that `::` or a global address is chosen by the IPv6 header fill function. Both types of addresses are [not valid for RAs](https://tools.ietf.org/html/rfc4861#section-4.2)
Otherwise, it may happen that `::` or a global address is chosen by the IPv6 header fill function. Both types of addresses are [not valid for RAs](https://tools.ietf.org/html/rfc4861#section-4.2)