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[Michal Nasiadka <1995078@xxxxxxxxxxxxxxxxxx>]

After doing all those changes in kolla-ansible - we found that data traffic bandwidth for External VLAN ports is kilobytes per second (around 30-100 kbytes/sec) compared to 200 megabytes/sec before.
Probably that's related to MAC flooding issues in OVN.

If we remove ovn-chassis-mac-mappings on network nodes - and
ha_chassis_group active chassis and gateway_chassis active chassis are
the same - everything works fine (except HA).

Any other ideas?

** Changed in: neutron
       Status: Invalid => Confirmed

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https://bugs.launchpad.net/bugs/1995078

Title:
  OVN: HA chassis group priority is different than gateway chassis
  priority

Status in kolla-ansible:
  Fix Released
Status in kolla-ansible wallaby series:
  Fix Committed
Status in kolla-ansible xena series:
  Fix Committed
Status in kolla-ansible yoga series:
  Fix Committed
Status in kolla-ansible zed series:
  Fix Released
Status in neutron:
  Confirmed

Bug description:
  OpenStack release affected - Wallaby, Xena and Yoga for sure
  OVN version: 21.12 (from CentOS NFV SIG repos)
  Host OS: CentOS Stream 8

  Neutron creates External ports for bare metal instances and uses ha_chassis_group.
  Neutron normally defines a different priority for Routers LRP gateway chassis and ha_chassis_group.

  I have a router with two VLANs attached - external (used for internet
  connectivity - SNAT or DNAT/Floating IP) and internal VLAN network
  hosting bare metal servers (and some Geneve networks for VMs).

  If an External port’s HA chassis group active chassis is different
  than gateway chassis (external vlan network) active chassis - those
  bare metal servers have intermittent network connectivity for any
  traffic going through that router.

  In a thread on ovs-discuss ML - Numan Siddique wrote that "it is recommended that the
  same controller which is actively handling the gateway traffic also
  handles the external ports"

  More information in this thread -
  https://mail.openvswitch.org/pipermail/ovs-
  discuss/2022-October/052067.html

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