Cloned from launchpad blueprint https://blueprints.launchpad.net/neutron/+spec/extensions-in-ml2. Description: In the current ML2 plugin implementation, only the extensions defined in the Ml2Plugin class itself are available, and there is no way for core resources to be extended with attributes needed by specific mechanism drivers. When such extensions are needed, whether for new general purpose features that might be incorporated in future core API versions, or to better support specific networking technologies, the only current option is to implement a new monolithic plugin Specification URL (additional information): http://git.openstack.org/cgit/openstack/neutron-specs/tree/specs/juno/neutron-ml2-mechanismdriver-extensions.rst
This bug has been closed as a part of the RHEL-OSP 6 general availability release. For details, see https://rhn.redhat.com/errata/rhel7-rhos-6-errata.html