RHOSP 13. DVR no longer sends GARPs after instance's live migration

Solution Verified - Updated -

Issue

  • Instance's floating IP no longer available after live migration
  • Instance is unreachable after live migration
  • Live migration breaks FIP
  • GARPs are no longer generated for live-migrated instance's FIPs

Environment

  • Red Hat OpenStack Platform 13 Z9
  • Red Hat OpenStack Platform 13 Z10
  • Red Hat OpenStack Platform 13 Z11 (rhosp13/openstack-neutron-l3-agent:13.0-113 is known to be affected)

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