Currently, the address choice logic is: * if we have an IPv6 address and can reach the ls IPv6 address, and prefer IPv6, use it * if we have an IPv4 address and can reach the ls IPv4 address, use it But it needs to be: * if we have both addresses and can reach both, then use whatever we prefer * if we have one address and can reach it, use it This doesn't matter until clients put IPv6 addresses in the link specifier.