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---
features:
- The Libvirt driver now uses os-vif plugins for
handling plug/unplug actions for the Linux Bridge
and OpenVSwitch VIF types. Each os-vif plugin will
have its own group in nova.conf for configuration
parameters it needs. These plugins will be installed
by default as part of the os-vif module installation
so no special action is required.
upgrade:
- With the introduction of os-vif, some networking related
configuration options have moved, and users will need to update
their ``nova.conf``.
For OpenVSwitch users the following options have moved from
``[DEFAULT]`` to ``[vif_plug_ovs]``
- network_device_mtu
- ovs_vsctl_timeout
For Linux Bridge users the following options have moved from
``[DEFAULT]`` to ``[vif_plug_linux_bridge]``
- use_ipv6
- iptables_top_regex
- iptables_bottom_regex
- iptables_drop_action
- forward_bridge_interface
- vlan_interface
- flat_interface
- network_device_mtu
For backwards compatibility, and ease of upgrade, these options
will continue to work from ``[DEFAULT]`` during the Newton
release. However they will not in future releases.
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