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---
features:
- Adds support for `routed networks
<https://docs.openstack.org/neutron/latest/admin/config-routed-networks>`_
when using the ``flat`` network interface. This feature requires the
``baremetal`` ML2 mechanism driver and L2 agent from the
`networking-baremetal <https://docs.openstack.org/networking-baremetal>`_
plugin. See the `networking configuration documentation
<https://docs.openstack.org/ironic/latest/install/configure-networking.html>`_
for more details.
upgrade:
- |
The ``baremetal`` ML2 mechanism driver and L2 agent should now be used
with the ``flat`` network interface. When installed, the ``baremetal``
mechanism driver and agent ensure that ports are properly bound in the
Networking service. Installation and configuration of the ML2 components
are documented in the `networking-baremetal project documentation
<https://docs.openstack.org/networking-baremetal>`_.
Without the ML2 mechanism driver and L2 agent, the Networking service's
ports will not be correctly bound. In the Networking
service, ports will have a ``DOWN`` status, and the ``binding_vif_type``
field equal to ``binding_failed``. This was always the status for the
``flat`` network interface ports prior to the introduction of the
``baremetal`` mechanism driver. For a non-routed network, bare metal nodes
can still be deployed and are functional, despite this port binding state
in the Networking service.
fixes:
- Fixes an issue where the Networking service would reject port bindings
with the ``flat`` network interface because no host would match the
*host-id* used in such configurations. The ``flat`` network interface no
longer requires a networking agent (such as ``neutron-openvswitch-agent``)
to be run on the ``nova-compute`` proxy node which executes the ironic virt
driver. Instead, the interface uses the `baremetal mechanism driver
<https://docs.openstack.org/networking-baremetal>`_.
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