[Openstack][16.1][OVN] - Communication between floating IPs may fail when mulit-subnet provider networks are used

Solution In Progress - Updated -


  • This issue is very specific to the following scenarios.
  • OVN ML2 neutron plugin is used (default in OSP 16)
  • Multiple IPv4 neutron subnets are created on the same provider network.
  • The issue can occur when the Neutron routers external IP address is allocated from a different provider subnet than the associated floating IPs.
  • This issue only impacts network communication where the source and destination are behind the tenant routers and communicate through the tenant router(s).
  • This issue is currently being tracked with this bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1920025


  • Red Hat Openstack Platform 16.1

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