neutron/releasenotes/notes/macvtap-l2-agent-2b551d8ec3...

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prelude: >
Adding MacVtap ML2 driver and L2 Agent as new vswitch choice
features:
- Libvirt qemu/kvm instances can now be attached via MacVtap in
bridge mode to a network. VLAN and FLAT attachments are
supported. Other attachmentes than compute are not supported.
issues:
- To ensure any kind of migration works between all compute nodes,
make sure that the same physical_interface_mappings is
configured on each MacVtap compute node. Having different
mappings could cause live migration to fail (if the configured
physical network interface does not exist on the target host), or
even worse, result in an instance placed on the wrong physical
network (if the physical network interface exists on the target
host, but is used by another physical network or not used at all
by OpenStack). Such an instance does not have access to its
configured networks anymore. It then has layer 2 connectivity to
either another OpenStack network, or one of the hosts networks.