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[OpenStack Infra <2035325@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.opendev.org/c/openstack/neutron/+/893333
Committed: https://opendev.org/openstack/neutron/commit/1e9f50c73638171403b71d742321464dcd5ef7ed
Submitter: "Zuul (22348)"
Branch:    master

commit 1e9f50c73638171403b71d742321464dcd5ef7ed
Author: Luis Tomas Bolivar <ltomasbo@xxxxxxxxxx>
Date:   Fri Sep 8 10:40:32 2023 +0200

    Add support for FDB aging
    
    In [1] we added support for FDB learning. In order to avoid issues
    due to that table increasing without limits, which will impact OVN
    performance, this patch is adding support for its aging mechanisms
    which was added in OVN 23.09 in [2]. By default is disabled, so if
    `localnet_learn_fdb` is enabled, the new configuration parameters
    should be appropriately configured too: `fdb_age_threshold` and
    `fdb_removal_limit`
    
    [1] https://review.opendev.org/c/openstack/neutron/+/877675
    [2] https://github.com/ovn-org/ovn/commit/ae9a5488824c49e25215b02e7e81a62eb4d0bd53
    
    Closes-Bug: 2035325
    
    Change-Id: Ifdfaec35cc6b52040487a2b5ee08aba9282fc68b


** Changed in: neutron
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/2035325

Title:
  FDB entries grows indefinitely

Status in neutron:
  Fix Released

Bug description:
  With the added support for learning FDB entries [1] there is a problem
  that FDB table can grow indefinitely, leading to performance/scale
  issues. New options are added to OVN [2] to tackle this problem, and
  neutron should make use of it

  
  [1] https://review.opendev.org/c/openstack/neutron/+/877675  
  [2] https://github.com/ovn-org/ovn/commit/ae9a5488824c49e25215b02e7e81a62eb4d0bd53

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