Comment 13 for bug 1914842

Reviewed: https://review.opendev.org/c/openstack/neutron/+/795279
Committed: https://opendev.org/openstack/neutron/commit/d27421d5823a525af654b640df06214d4c0c74a8
Submitter: "Zuul (22348)"
Branch: stable/ussuri

commit d27421d5823a525af654b640df06214d4c0c74a8
Author: yangjianfeng <email address hidden>
Date: Sun Feb 7 09:59:07 2021 +0000

    Make phynet paramter also is optional when network_segment_range enabled

    When network_segment_range plugin is not enabled, we can create a provider
    network without physical_network parameter. In order to compatibility,
    We should support to not provide physical_network parameter when create
    provider network with network_segment_range plugin enabled.

    Closes-Bug: #1914842
    Change-Id: If19a6a9b0f2910baefba9d7ea9955b1f0ad7d252
    (cherry picked from commit fa7c7282f019d3e0dd4d492f5ff2c47bd45b0ce7)