---
features:
  - |
    The new ``ovn::controller::ovn_ofctrl_wait_before_clear`` parameter
    has been added to resolve an issue with dataplane downtime during
    upgrades that involve OVN schema changes. It will delay delting and
    re-adding openflow rules by the configured time in ms to give
    ovn-controller time to handle db connection / reconnection that can
    happen in this case. The default of 8000ms is based on upstream OVN
    testing with 200k openflow rules. Since it involved a change in
    behavior, the upstream OVN value defaults to unset.