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[OpenStack Infra <2033887@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.opendev.org/c/openstack/neutron/+/893447
Committed: https://opendev.org/openstack/neutron/commit/1b034f8d62091724a6fb639f34c2f8936329b501
Submitter: "Zuul (22348)"
Branch:    master

commit 1b034f8d62091724a6fb639f34c2f8936329b501
Author: Rodolfo Alonso <ralonsoh@xxxxxxxxxx>
Date:   Fri Sep 1 11:43:24 2023 +0000

    Revert "[OVN][Trunk] Add port binding info on subport when parent is bound"
    
    This reverts commit 955e621167987626806128d259a29d4e62acf102.
    
    Reason for revert: the port binding handling done in this patch is
    incorrect and leads to issues during the cold migration process with
    trunk ports in ML2/OVN.
    
    Change-Id: Ifc2d37e2042fad43dd838821953defd99a5f8665
    Closes-Bug: #2033887


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

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https://bugs.launchpad.net/bugs/2033887

Title:
  [OVN][Trunk] The cold migration process is broken since patch 882581

Status in neutron:
  Fix Released

Bug description:
  The patch [1] is incorrectly handling the port binding of the
  subports. This is a more complex operation than just updating the
  "PortBinding" object. In order to change the port binding host ID, it
  is needed to remove all "PortBinding" and "PortBindingLevels"
  registers and create new ones pointing to the new host ID.

  This patch is also breaking the cold migration process in ML2/OVN
  environments with Trunk ports. The subports are not receiving the DHCP
  information because OVN is not creating the DHCP flows that attend to
  the DHCP requests. For example [2].

  The recommended action is to revert the mentioned patch.

  [1]https://review.opendev.org/c/openstack/neutron/+/882581
  [2]https://paste.opendev.org/show/bVnaVLVP9fkrm0QlXtYc/

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