Hi again Stackers, In 2023, during the Bobcat cycle, the Neutron team changed the IPv6 Prefix Delegation (IPv6 PD) 'dibbler' driver to be an experimental feature [0]. The reason was due to it (dibbler) becoming unmaintained/retired upstream, as well as the low level of testing support we had in Neutron for the feature. So what does this mean? We (the neutron cores) have come to the conclusion that it is time to take the next step and remove the driver from the tree [1]. The framework to support IPv6 PD is *not* being removed, but as this is the only in-tree driver the functionality will no longer be available to end-users. We plan on doing this in the current Epoxy cycle. We realize that there may be deployments using IPv6 PD, although we have not to my knowledge ever received a bug against it, so we think any usage is very small. If there is desire to add an in-tree driver back to the code base, there is an open OVN-related bug for that at [2], we have just not had the interest from downstream customers to warrant the investment in this area. Thanks for reading, -Brian, Neutron PTL [0] https://review.opendev.org/c/openstack/neutron/+/879030 [1] https://review.opendev.org/c/openstack/neutron/+/934283 [2] https://bugs.launchpad.net/neutron/+bug/1895972