Comment 2 for bug 1810905

@Antonio, Hi, Thanks for your nice experience and quick reply. You are correct, many companies here are running in a dual stack env now for past the transition period, and this situation case should take a period for now in our country.

1. For the first one, IPv4 FIP <-> Internal IPv6, seem Lbaas is a possible solution.And now, we use the static configuration on the outgoing device. But it's hard to maintain or change, so we want the experience or suggestion from community experts.
2. For dual stack, that's right. It's impossible to run a single stack in this kind situation, so we keep our internal env, running dual stack env now. As you mentioned IPv6 unlink setting, for us, it's not clear for how to do that in neutron now. ;-(. So how to do that with a reasonable usecase and not affect too much towards current Neutron model, especially the Router/subnet resources.