diff --git a/doc/source/backwards-incompatible.rst b/doc/source/backwards-incompatible.rst
index bb2b0bddb9..4b90d6e1bc 100644
--- a/doc/source/backwards-incompatible.rst
+++ b/doc/source/backwards-incompatible.rst
@@ -162,6 +162,36 @@ List of Backwards Incompatible Changes
   * Bug: https://bugs.launchpad.net/python-openstackclient/+bug/1546065
   * Commit: https://review.openstack.org/#/c/281089/
 
+14. Output of `ip floating list` command has changed.
+
+  When using Compute v2, the original output of `ip floating list` command is:
+  +----+--------+------------+----------+-------------+
+  | ID | Pool   | IP         | Fixed IP | Instance ID |
+  +----+--------+-----------------------+-------------+
+  |  1 | public | 172.24.4.1 | None     | None        |
+  +----+--------+------------+----------+-------------+
+
+  Now it changes to:
+  +----+---------------------+------------------+-----------+--------+
+  | ID | Floating IP Address | Fixed IP Address | Server ID | Pool   |
+  +----+---------------------+------------------+-----------+--------+
+  |  1 | 172.24.4.1          | None             | None      | public |
+  +----+---------------------+------------------+-----------+--------+
+
+  When using Network v2, the output of `ip floating list` command is:
+  +--------------------------------------+---------------------+------------------+------+
+  | ID                                   | Floating IP Address | Fixed IP Address | Port |
+  +--------------------------------------+---------------------+------------------+------+
+  | 1976df86-e66a-4f96-81bd-c6ffee6407f1 | 172.24.4.3          | None             | None |
+  +--------------------------------------+---------------------+------------------+------+
+  which is different from Compute v2.
+
+  * In favor of: Use `ip floating list` command
+  * As of: NA
+  * Removed in: NA
+  * Bug: https://bugs.launchpad.net/python-openstackclient/+bug/1519502
+  * Commit: https://review.openstack.org/#/c/277720/
+
 For Developers
 ==============
 
diff --git a/releasenotes/notes/bug-1519502-f72236598d14d350.yaml b/releasenotes/notes/bug-1519502-f72236598d14d350.yaml
index 73ead7f427..1ace59bd66 100644
--- a/releasenotes/notes/bug-1519502-f72236598d14d350.yaml
+++ b/releasenotes/notes/bug-1519502-f72236598d14d350.yaml
@@ -6,3 +6,7 @@ features:
     [Bug `1519502 <https://bugs.launchpad.net/python-openstackclient/+bug/1519502>`_]
   - Add command ``ip floating show`` for neutron and nova network.
     [Bug `1519502 <https://bugs.launchpad.net/python-openstackclient/+bug/1519502>`_]
+upgrade:
+  - Output of command ``ip floating list`` for nova network has been changed.
+    And it is different from the output of neutron network.
+    [Ref `<http://docs.openstack.org/developer/python-openstackclient/backwards-incompatible.html>`_]