In T7646#231848, @ryanzuwala wrote:

@josha I agree with you. Perhaps it should be like this?

• ipv6 address autoconf - accept RAs and do whatever M and O flags tell it to do
• ipv6 address dhcpv6 - DCHPv6 without RAs, determine default route from neighbor discovery (possibly using the functionality in @josha script above)
• ipv6 address dhcpv6 no-default-gateway - DHCPv6 without RAs, must configure default route separately if needed
• ipv6 address xx:xx:xx.... - Static IP