How do I enable communication to same ip address for multiple instances in Openstack?

Solution Unverified - Updated -

Issue

  • Alternate or secondary interface IP addresses do not function properly on Openstack instances.
  • Virtual IP addresses do not function properly on Openstack instances.
  • Keepalived Virtual IP addresses do not function properly on Openstack instances.
  • An Openstack instance, by default, allows communication to only the mac address and ip address allocated for it by Nova/Neutron due to anti-spoofing rules. I have a requirement to configure additional virtual ips on the instance as ip alias for some clustering requirements which should float between multiple instances during fail over. How can I achieve this?

Environment

  • Red Hat Enterprise Linux OpenStack Platform 5
  • Red Hat Enterprise Linux OpenStack Platform 6
  • Red Hat Enterprise Linux OpenStack Platform 7

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