Comment 5 for bug 1887281

Reviewed: https://review.opendev.org/740588
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=2207b885449667a7bc377f427b9123165223dbde
Submitter: Zuul
Branch: master

commit 2207b885449667a7bc377f427b9123165223dbde
Author: Lukas Steiner <email address hidden>
Date: Sun Jul 12 14:10:26 2020 +0200

    Flush ebtables arp protect chains before deleting them

    When a port is removed, the linuxbridge agent cleans up the chains
    neutronARP-* and neutronMAC-*, but in some cases this chains still
    contains rules and ebtables fails with `CHAIN_USER_DEL failed (Device or
    resource busy)`. Flushing the chains before deleting them, fixes that
    issue.

    Change-Id: Icfcf8c5406cfdc47fabf012e82ed56c345a73af8
    Closes-Bug: #1887281