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---
fixes:
- |
Fixes `bug 1996995`_ in which VMs live migrated on certain VXLAN Arista
network fabrics were inaccessible until the switch arp cache expired.
A Nova workaround option of ``enable_qemu_monitor_announce_self`` was added
to fix `bug 1815989`_ which when enabled would interact with the QEMU
monitor and force a VM to announce itself.
On certain network fabrics, VMs that are live migrated remain inaccessible
via the network despite the QEMU monitor announce_self command successfully
being called.
It was noted that on Arista VXLAN fabrics, testing showed that it required
several attempts of running the QEMU announce_self monitor command before
the switch would acknowledge a VM's new location on the fabric.
This fix introduces two operator configurable options.
The first option sets the number of times the QEMU monitor announce_self
command is called - ``qemu_announce_self_count``
The second option allows operators to set the delay between the QEMU
announce_self commands in seconds for subsequent announce_self commands
with ``qemu_announce_self_interval``
.. _`bug 1996995`: https://bugs.launchpad.net/nova/+bug/1996995
.. _`bug 1815989`: https://bugs.launchpad.net/nova/+bug/1815989
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