diff --git a/0001-Create-executable-for-removing-patch-ports.patch b/0001-Create-executable-for-removing-patch-ports.patch
deleted file mode 100644
index 47f23fd..0000000
--- a/0001-Create-executable-for-removing-patch-ports.patch
+++ /dev/null
@@ -1,198 +0,0 @@
-From 9238592fcb2238bfd34d9c0b414573cb6f3d9582 Mon Sep 17 00:00:00 2001
-From: Jakub Libosvar <libosvar@redhat.com>
-Date: Thu, 12 Oct 2017 15:19:31 +0000
-Subject: [PATCH] Create executable for removing patch ports
-
-Nodes using provider bridges for internal traffic like amqp can cause an
-ARP storm when at least two nodes were shutdown ungracefully and are
-brought up at once. It's caused by having patch-ports between provider
-bridges and integration bridge, hence the integration bridge passes ARP
-broadcast packets from one provider bridge to another.
-
-This patch introduces a cleanup script that scans Neutron config and
-removes patch ports from integration bridge and bridges defined in
-bridge_mappings option. Such script can be executed when node is booted.
-
-Resolves: rhbz#1490281
-Closes-bug: #1720766
-
-Change-Id: I774cefac2951343a30f882791abf12598bc99603
----
- neutron/cmd/destroy_patch_ports.py                 | 77 ++++++++++++++++++++
- .../functional/cmd/test_destroy_patch_ports.py     | 83 ++++++++++++++++++++++
- 2 files changed, 160 insertions(+)
- create mode 100644 neutron/cmd/destroy_patch_ports.py
- create mode 100644 neutron/tests/functional/cmd/test_destroy_patch_ports.py
-
-diff --git a/neutron/cmd/destroy_patch_ports.py b/neutron/cmd/destroy_patch_ports.py
-new file mode 100644
-index 0000000..d6fb4b3
---- /dev/null
-+++ b/neutron/cmd/destroy_patch_ports.py
-@@ -0,0 +1,77 @@
-+# Copyright 2017 Red Hat, Inc.
-+# All Rights Reserved.
-+#
-+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
-+#    not use this file except in compliance with the License. You may obtain
-+#    a copy of the License at
-+#
-+#         http://www.apache.org/licenses/LICENSE-2.0
-+#
-+#    Unless required by applicable law or agreed to in writing, software
-+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-+#    License for the specific language governing permissions and limitations
-+#    under the License.
-+
-+import sys
-+
-+from neutron_lib.utils import helpers
-+from oslo_config import cfg
-+from oslo_log import log as logging
-+
-+from neutron.agent.common import ovs_lib
-+from neutron.common import config as common_config
-+from neutron.conf.plugins.ml2.drivers import ovs_conf
-+from neutron.plugins.common import utils as p_utils
-+from neutron.plugins.ml2.drivers.openvswitch.agent.common import constants
-+
-+LOG = logging.getLogger(__name__)
-+
-+
-+def get_patch_port_names(bridge_name):
-+    int_if_name = p_utils.get_interface_name(
-+        bridge_name, prefix=constants.PEER_INTEGRATION_PREFIX)
-+    phys_if_name = p_utils.get_interface_name(
-+        bridge_name, prefix=constants.PEER_PHYSICAL_PREFIX)
-+
-+    return int_if_name, phys_if_name
-+
-+
-+class PatchPortCleaner(object):
-+    def __init__(self, config):
-+        mappings = helpers.parse_mappings(config.OVS.bridge_mappings)
-+        self.bridges = [ovs_lib.OVSBridge(bridge)
-+                        for bridge in mappings.values()]
-+        self.int_br = ovs_lib.OVSBridge(config.OVS.integration_bridge)
-+
-+    def destroy_patch_ports(self):
-+        if not self.int_br.bridge_exists(self.int_br.br_name):
-+            # integration bridge hasn't been created by agent yet, nothing to
-+            # clean
-+            return
-+        for bridge in self.bridges:
-+            try:
-+                self._remove_patch_ports_from_int_br(bridge)
-+            except Exception as e:
-+                LOG.error("Failed to remove patch port from bridge %s: %s",
-+                          bridge.br_name, e)
-+
-+    def _remove_patch_ports_from_int_br(self, bridge):
-+        int_if_name, phys_if_name = get_patch_port_names(
-+            bridge.br_name)
-+        int_type = self.int_br.db_get_val(
-+            "Interface", int_if_name, "type", log_errors=False)
-+        if int_type == 'patch':
-+            self.int_br.delete_port(int_if_name)
-+            bridge.delete_port(phys_if_name)
-+
-+
-+def main():
-+    common_config.init(sys.argv[1:])
-+    ovs_conf.register_ovs_agent_opts()
-+    port_cleaner = PatchPortCleaner(cfg.CONF)
-+    port_cleaner.destroy_patch_ports()
-+
-+
-+if __name__ == "__main__":
-+    main()
-diff --git a/neutron/tests/functional/cmd/test_destroy_patch_ports.py b/neutron/tests/functional/cmd/test_destroy_patch_ports.py
-new file mode 100644
-index 0000000..9c92edf
---- /dev/null
-+++ b/neutron/tests/functional/cmd/test_destroy_patch_ports.py
-@@ -0,0 +1,83 @@
-+# Copyright 2017 Red Hat, Inc.
-+# All Rights Reserved.
-+#
-+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
-+#    not use this file except in compliance with the License. You may obtain
-+#    a copy of the License at
-+#
-+#         http://www.apache.org/licenses/LICENSE-2.0
-+#
-+#    Unless required by applicable law or agreed to in writing, software
-+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-+#    License for the specific language governing permissions and limitations
-+#    under the License.
-+
-+from neutron_lib import constants as n_const
-+from oslo_config import cfg
-+
-+from neutron.cmd import destroy_patch_ports
-+from neutron.common import utils
-+from neutron.conf.plugins.ml2.drivers import ovs_conf
-+from neutron.plugins.ml2.drivers.openvswitch.agent.common import constants
-+from neutron.tests.common import net_helpers
-+from neutron.tests.functional import base
-+
-+
-+class TestDestroyPatchPorts(base.BaseSudoTestCase):
-+    def setUp(self):
-+        super(TestDestroyPatchPorts, self).setUp()
-+        self.int_br = self.useFixture(net_helpers.OVSBridgeFixture()).bridge
-+        bridge_mappings = {}
-+        self.bridges = []
-+        for network in ('foo', 'bar'):
-+            bridge = self.useFixture(net_helpers.OVSBridgeFixture()).bridge
-+            self._create_patch_ports_to_int_br(bridge)
-+            self.bridges.append(bridge)
-+            bridge_mappings[network] = bridge.br_name
-+        self.config = self._create_config_file(bridge_mappings)
-+
-+    def _create_config_file(self, bridge_mappings):
-+        config = cfg.ConfigOpts()
-+        ovs_conf.register_ovs_agent_opts(config)
-+        config.set_override('integration_bridge', self.int_br.br_name, "OVS")
-+        config.set_override(
-+            'bridge_mappings',
-+            ','.join(["%s:%s" % (net, br)
-+                      for net, br in bridge_mappings.items()]),
-+            "OVS")
-+
-+        return config
-+
-+    def _create_patch_ports_to_int_br(self, bridge):
-+        int_if_name, phys_if_name = destroy_patch_ports.get_patch_port_names(
-+            bridge.br_name)
-+        self.int_br.add_patch_port(
-+            int_if_name, constants.NONEXISTENT_PEER)
-+        bridge.add_patch_port(
-+            phys_if_name, constants.NONEXISTENT_PEER)
-+        self.int_br.set_db_attribute(
-+            'Interface', int_if_name, 'options', {'peer': phys_if_name})
-+        bridge.set_db_attribute(
-+            'Interface', phys_if_name, 'options', {'peer': int_if_name})
-+
-+    def _has_patch_ports(self, bridge):
-+        int_if_name, phys_if_name = destroy_patch_ports.get_patch_port_names(
-+            bridge.br_name)
-+        return (bridge.port_exists(phys_if_name) and
-+                self.int_br.port_exists(int_if_name))
-+
-+    def test_destroy_patch_ports(self):
-+        self.assertTrue(all(self._has_patch_ports(bridge)
-+                            for bridge in self.bridges))
-+        cleaner = destroy_patch_ports.PatchPortCleaner(self.config)
-+        cleaner.destroy_patch_ports()
-+        self.assertFalse(any(self._has_patch_ports(bridge)
-+                             for bridge in self.bridges))
-+
-+    def test_destroy_patch_ports_no_int_br(self):
-+        name = utils.get_rand_name(
-+            max_length=n_const.DEVICE_NAME_MAX_LEN)
-+        self.config.set_override('integration_bridge', name, "OVS")
-+        cleaner = destroy_patch_ports.PatchPortCleaner(self.config)
-+        cleaner.destroy_patch_ports()
diff --git a/0002-Destroy-patch-ports-only-if-canary-flow-is-not-prese.patch b/0002-Destroy-patch-ports-only-if-canary-flow-is-not-prese.patch
deleted file mode 100644
index 6b4ef68..0000000
--- a/0002-Destroy-patch-ports-only-if-canary-flow-is-not-prese.patch
+++ /dev/null
@@ -1,81 +0,0 @@
-From 20e704e066c5b6beed78828e662f8562a6db1e63 Mon Sep 17 00:00:00 2001
-From: Jakub Libosvar <libosvar@redhat.com>
-Date: Fri, 10 Nov 2017 16:12:10 +0000
-Subject: [PATCH] Destroy patch ports only if canary flow is not present
-
-Because of containers management do not have any dependency system,
-we need to call destroy-patch-ports command before
-neutron-openvswitch-agent process is started in the container. This
-patch adds functionality to avoid destroying the patch ports in case
-canary flow is present on the integration bridge. This is to avoid cases
-where container is stopped and started, which would cause a data plane
-disruption due to removing patch ports when it's not necessary. Patch
-ports are needed to be removed only in cases where node was ungracefully
-taken down.
-
-Change-Id: I5ef0f54741abce40bedd0c958befc9cb39cd21c4
-Resolves: rhbz/1511988
----
- neutron/cmd/destroy_patch_ports.py                       | 12 +++++++++---
- neutron/tests/functional/cmd/test_destroy_patch_ports.py | 12 +++++++++++-
- 2 files changed, 20 insertions(+), 4 deletions(-)
-
-diff --git a/neutron/cmd/destroy_patch_ports.py b/neutron/cmd/destroy_patch_ports.py
-index d6fb4b3..8c3ea98 100644
---- a/neutron/cmd/destroy_patch_ports.py
-+++ b/neutron/cmd/destroy_patch_ports.py
-@@ -45,9 +45,10 @@ class PatchPortCleaner(object):
-         self.int_br = ovs_lib.OVSBridge(config.OVS.integration_bridge)
- 
-     def destroy_patch_ports(self):
--        if not self.int_br.bridge_exists(self.int_br.br_name):
--            # integration bridge hasn't been created by agent yet, nothing to
--            # clean
-+        if (not self.int_br.bridge_exists(self.int_br.br_name) or
-+                self.flows_configured()):
-+            # integration bridge hasn't been created by agent yet or it's been
-+            # already configured by the agent
-             return
-         for bridge in self.bridges:
-             try:
-@@ -65,6 +66,11 @@ class PatchPortCleaner(object):
-             self.int_br.delete_port(int_if_name)
-             bridge.delete_port(phys_if_name)
- 
-+    def flows_configured(self):
-+        """Return True if the integration bridge has flows already configured.
-+        """
-+        return bool(self.int_br.dump_flows_for(table=constants.CANARY_TABLE))
-+
- 
- def main():
-     common_config.init(sys.argv[1:])
-diff --git a/neutron/tests/functional/cmd/test_destroy_patch_ports.py b/neutron/tests/functional/cmd/test_destroy_patch_ports.py
-index 9c92edf..b53f1b8 100644
---- a/neutron/tests/functional/cmd/test_destroy_patch_ports.py
-+++ b/neutron/tests/functional/cmd/test_destroy_patch_ports.py
-@@ -67,9 +67,12 @@ class TestDestroyPatchPorts(base.BaseSudoTestCase):
-         return (bridge.port_exists(phys_if_name) and
-                 self.int_br.port_exists(int_if_name))
- 
--    def test_destroy_patch_ports(self):
-+    def _assert_has_all_ports(self):
-         self.assertTrue(all(self._has_patch_ports(bridge)
-                             for bridge in self.bridges))
-+
-+    def test_destroy_patch_ports(self):
-+        self._assert_has_all_ports()
-         cleaner = destroy_patch_ports.PatchPortCleaner(self.config)
-         cleaner.destroy_patch_ports()
-         self.assertFalse(any(self._has_patch_ports(bridge)
-@@ -81,3 +84,10 @@ class TestDestroyPatchPorts(base.BaseSudoTestCase):
-         self.config.set_override('integration_bridge', name, "OVS")
-         cleaner = destroy_patch_ports.PatchPortCleaner(self.config)
-         cleaner.destroy_patch_ports()
-+
-+    def test_destroy_patch_ports_canary_flow_on_int_br(self):
-+        self.int_br.add_flow(table=constants.CANARY_TABLE, actions="drop")
-+        self._assert_has_all_ports()
-+        cleaner = destroy_patch_ports.PatchPortCleaner(self.config)
-+        cleaner.destroy_patch_ports()
-+        self._assert_has_all_ports()
diff --git a/0003-use-plugin-utils-from-neutron-lib.patch b/0003-use-plugin-utils-from-neutron-lib.patch
deleted file mode 100644
index 3dc0cd5..0000000
--- a/0003-use-plugin-utils-from-neutron-lib.patch
+++ /dev/null
@@ -1,36 +0,0 @@
-From 91ebd644ed9811cc822d773914590d5b4659bed4 Mon Sep 17 00:00:00 2001
-From: yatin <ykarel@redhat.com>
-Date: Tue, 17 Jul 2018 10:17:44 +0530
-Subject: [PATCH] use plugin utils from neutron-lib
-
-Upstream switched to neutron_lib usage in
-https://review.openstack.org/#/c/565284/.
-
-Change-Id: I88672f7ddd05ab277281772787666206f45e45ca
----
- neutron/cmd/destroy_patch_ports.py | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/neutron/cmd/destroy_patch_ports.py b/neutron/cmd/destroy_patch_ports.py
-index 8c3ea98c1..76d9ebff8 100644
---- a/neutron/cmd/destroy_patch_ports.py
-+++ b/neutron/cmd/destroy_patch_ports.py
-@@ -15,6 +15,7 @@
- 
- import sys
- 
-+from neutron_lib.plugins import utils as p_utils
- from neutron_lib.utils import helpers
- from oslo_config import cfg
- from oslo_log import log as logging
-@@ -22,7 +23,6 @@ from oslo_log import log as logging
- from neutron.agent.common import ovs_lib
- from neutron.common import config as common_config
- from neutron.conf.plugins.ml2.drivers import ovs_conf
--from neutron.plugins.common import utils as p_utils
- from neutron.plugins.ml2.drivers.openvswitch.agent.common import constants
- 
- LOG = logging.getLogger(__name__)
--- 
-2.17.1
-
diff --git a/0004-Adjust-logging-for-removing-patch-ports.patch b/0004-Adjust-logging-for-removing-patch-ports.patch
deleted file mode 100644
index fe02b54..0000000
--- a/0004-Adjust-logging-for-removing-patch-ports.patch
+++ /dev/null
@@ -1,34 +0,0 @@
---- a/neutron/cmd/destroy_patch_ports.py
-+++ b/neutron/cmd/destroy_patch_ports.py
-@@ -39,6 +39,7 @@
-
- class PatchPortCleaner(object):
-     def __init__(self, config):
-+        LOG.debug("Get OVS bridge mappings")
-         mappings = helpers.parse_mappings(config.OVS.bridge_mappings)
-         self.bridges = [ovs_lib.OVSBridge(bridge)
-                         for bridge in mappings.values()]
-@@ -52,6 +53,7 @@
-             return
-         for bridge in self.bridges:
-             try:
-+                LOG.debug("Remove patch port from bridge %s", bridge.br_name)
-                 self._remove_patch_ports_from_int_br(bridge)
-             except Exception as e:
-                 LOG.error("Failed to remove patch port from bridge %s: %s",
-@@ -69,12 +71,15 @@
-     def flows_configured(self):
-         """Return True if the integration bridge has flows already configured.
-         """
-+        LOG.debug("Get configured flows for integration bridge %s",
-+                  self.int_br.br_name)
-         return bool(self.int_br.dump_flows_for(table=constants.CANARY_TABLE))
-
-
- def main():
-     common_config.init(sys.argv[1:])
-     ovs_conf.register_ovs_agent_opts()
-+    common_config.setup_logging()
-     port_cleaner = PatchPortCleaner(cfg.CONF)
-     port_cleaner.destroy_patch_ports()
-
diff --git a/neutron-17.0.0.tar.gz b/neutron-17.0.0.tar.gz
deleted file mode 100644
index 20d012a..0000000
Binary files a/neutron-17.0.0.tar.gz and /dev/null differ
diff --git a/neutron-17.0.0.tar.gz.asc b/neutron-17.0.0.tar.gz.asc
deleted file mode 100644
index 82bd240..0000000
--- a/neutron-17.0.0.tar.gz.asc
+++ /dev/null
@@ -1,14 +0,0 @@
------BEGIN PGP SIGNATURE-----
-
-iQGzBAABCgAdFiEEvCbTqNBmXIf3vt8qwSuOc7MPL8gFAl+G0l4ACgkQwSuOc7MP
-L8jEJAwAlTz1nvUXE+8eYzkQbtQoVSohnLCVm7IDaVaSmPwSVROTn922rXnr+lJ3
-ZT973r2yeLuWKcwJgHkiCyEetnl6nEu5jpCetEmhefPb8T+czZmPC3Ex5NrMp6Om
-jkWi6uPYzLxM1xIpFfpJv2zxIpdvYT2UKIg77wCmS9HRapk+Br7+KOIqmiZCD46s
-W4dX3BGL9pyghykBf8zd4zsZx+yQzyo+DsnF9KzbyE3m+iFySdmUcg0sfDOcft/4
-+gutZPPoyHlQLCzlsQ6WnkEKyyaJUFOLv1+zQ5ZWKWkv1K8buSnswXImXgS78Fs7
-KT6Z16fQ1IrJKTtGLenr2qvSx7Kg2DPa/x+DX8aiBzJekaO1SR/FOPURylp3g+JH
-x0ckdF1lafH6gIe1cI4NQWV7r51wLnhWUGEofRuUuycpnLZlxaLXjQKsDrJHpIYX
-WFIKvIKwZ/2vGnJGZweDWAyHVx3phb69ag3OK2Tm18uqY9rSPVKJNWdblR0Vuk9X
-BPw3NY/Z
-=LJ57
------END PGP SIGNATURE-----
diff --git a/openstack-neutron-17.0.0-1.el8.src.rpm b/neutron-18.1.0.tar.gz
similarity index 60%
rename from openstack-neutron-17.0.0-1.el8.src.rpm
rename to neutron-18.1.0.tar.gz
index 9c67417..b8d3111 100644
Binary files a/openstack-neutron-17.0.0-1.el8.src.rpm and b/neutron-18.1.0.tar.gz differ
diff --git a/openstack-neutron.spec b/openstack-neutron.spec
index e655d39..8acb574 100644
--- a/openstack-neutron.spec
+++ b/openstack-neutron.spec
@@ -7,14 +7,25 @@ for pid in $(ps -f --ppid 1 | awk '/.*neutron-rootwrap-daemon/ { print $2 }'); d
 done \
 %nil
 
-Name:           openstack-neutron
-Version:        17.0.0
+%global common_desc \
+Neutron is a virtual network service for Openstack. Just like \
+OpenStack Nova provides an API to dynamically request and configure \
+virtual servers, Neutron provides an API to dynamically request and \
+configure virtual networks. These networks connect "interfaces" from \
+other OpenStack services (e.g., virtual NICs from Nova VMs). The \
+Neutron API supports extensions to provide advanced network \
+capabilities (e.g., QoS, ACLs, network monitoring, etc.)
+
+Name:           openstack-%{service}
+Version:        18.1.0
 Release:        1
-Epoch:          1
 Summary:        OpenStack Networking Service
-License:        Apache-2.0
-URL:            http://launchpad.net/neutron/
-Source0:        https://tarballs.openstack.org/neutron/neutron-%{upstream_version}.tar.gz
+
+License:        ASL 2.0
+URL:            http://launchpad.net/%{service}/
+
+Source0:        https://tarballs.openstack.org/%{service}/%{service}-%{upstream_version}.tar.gz
+
 Source1:        %{service}.logrotate
 Source2:        %{service}-sudoers
 Source10:       neutron-server.service
@@ -35,18 +46,17 @@ Source31:       conf.README
 Source32:       neutron-linuxbridge-cleanup.service
 Source33:       neutron-enable-bridge-firewall.sh
 Source34:       neutron-l2-agent-sysctl.conf
+# We use the legacy service to load modules because it allows to gracefully
+# ignore a missing kernel module (f.e. br_netfilter on earlier kernels). It's
+# essentially because .modules files are shell scripts.
 Source35:       neutron-l2-agent.modules
 Source36:       neutron-destroy-patch-ports.service
 Source37:       neutron-ovn-metadata-agent.service
-
-Patch0001: 0001-Create-executable-for-removing-patch-ports.patch
-Patch0002: 0002-Destroy-patch-ports-only-if-canary-flow-is-not-prese.patch
-Patch0003: 0003-use-plugin-utils-from-neutron-lib.patch
-Patch0004: 0004-Adjust-logging-for-removing-patch-ports.patch
+# Required for tarball sources verification
 
 BuildArch:      noarch
 
-BuildRequires:  git
+BuildRequires:  git-core
 BuildRequires:  openstack-macros
 BuildRequires:  python3-devel
 BuildRequires:  python3-babel
@@ -54,7 +64,6 @@ BuildRequires:  python3-keystoneauth1 >= 3.14.0
 BuildRequires:  python3-keystonemiddleware
 BuildRequires:  python3-neutron-lib
 BuildRequires:  python3-novaclient
-BuildRequires:  python3-os-xenapi
 BuildRequires:  python3-oslo-cache
 BuildRequires:  python3-oslo-concurrency
 BuildRequires:  python3-oslo-config
@@ -76,26 +85,53 @@ BuildRequires:  python3-pecan >= 1.3.2
 BuildRequires:  python3-tenacity >= 4.4.0
 BuildRequires:  python3-os-vif
 BuildRequires:  systemd
-BuildRequires:  python3-pip
 
-Requires:       openstack-%{service}-common = %{epoch}:%{version}-%{release}
+
+Requires:       openstack-%{service}-common = %{version}-%{release}
+
+# dnsmasq is not a hard requirement, but is currently the only option
+# when neutron-dhcp-agent is deployed.
 Requires:       dnsmasq >= 2.76
 Requires:       dnsmasq-utils >= 2.76
+
+# radvd is not a hard requirement, but is currently the only option
+# for IPv6 deployments.
 Requires:       radvd
+
+# dibbler is not a hard requirement, but is currently the default option
+# for IPv6 prefix delegation.
 Requires:       dibbler-client
+
+# conntrack is not a hard requirement, but is currently used by L3 agent
+# to immediately drop connections after a floating IP is disassociated
 Requires:       conntrack-tools
+
+# keepalived is not a hard requirement, but is currently used by DVR L3
+# agent
 Requires:       keepalived
+
+# haproxy implements metadata proxy process
 Requires:       haproxy >= 1.5.0
+
+# Those are not hard requirements, ipset is used by ipset-cleanup in the subpackage,
+# iptables is used by the l3-agent which currently is not in a separate package,
+# iputils provides tools like arping which are used by l3-agent and iproute-tc
+# (or iproute in case of CentOS 7 and RHEL 7), provides tc binary which is
+# used by e.g. l3-agent and openvswitch-agent when QoS extension is enabled
+# in agent's config.
 Requires:       ipset
 Requires:       iptables
 Requires:       iputils
 Requires:       iproute-tc
 
+
 %{?systemd_ordering}
 
 
+
 %description
-OpenStack Networking (Neutron)
+%{common_desc}
+
 
 %package -n python3-%{service}
 Summary:        Neutron Python libraries
@@ -103,69 +139,72 @@ Summary:        Neutron Python libraries
 Requires:       python3-alembic >= 0.9.6
 Requires:       python3-debtcollector >= 1.19.0
 Requires:       python3-designateclient >= 2.7.0
-Requires:       python3-eventlet >= 0.21.0
+Requires:       python3-eventlet >= 0.22.1
 Requires:       python3-greenlet >= 0.4.10
-Requires:       python3-futurist >= 1.10.0
+Requires:       python3-futurist >= 1.2.0
 Requires:       python3-jinja2 >= 2.10
 Requires:       python3-keystoneauth1 >= 3.14.0
-Requires:       python3-keystonemiddleware >= 4.17.0
+Requires:       python3-keystonemiddleware >= 5.1.0
 Requires:       python3-netaddr >= 0.7.18
 Requires:       python3-neutronclient >= 6.7.0
-Requires:       python3-neutron-lib >= 2.6.0
+Requires:       python3-neutron-lib >= 2.9.0
 Requires:       python3-novaclient >= 9.1.0
 Requires:       python3-os-vif >= 1.15.1
-Requires:       python3-os-xenapi >= 0.3.1
 Requires:       python3-oslo-cache >= 1.26.0
 Requires:       python3-oslo-concurrency >= 3.26.0
-Requires:       python3-oslo-config
-Requires:       python3-oslo-context >= 2.20.0
+Requires:       python3-oslo-config >= 8.0.0
+Requires:       python3-oslo-context >= 2.22.0
 Requires:       python3-oslo-db >= 4.44.0
 Requires:       python3-oslo-i18n >= 3.20.0
-Requires:       python3-oslo-log >= 4.2.1
+Requires:       python3-oslo-log >= 4.3.0
 Requires:       python3-oslo-messaging >= 7.0.0
 Requires:       python3-oslo-middleware >= 3.31.0
-Requires:       python3-oslo-policy >= 1.30.0
+Requires:       python3-oslo-policy >= 3.6.2
 Requires:       python3-oslo-privsep >= 2.3.0
 Requires:       python3-oslo-reports >= 1.18.0
 Requires:       python3-oslo-rootwrap >= 5.8.0
 Requires:       python3-oslo-serialization >= 2.25.0
-Requires:       python3-oslo-service >= 1.24.0
-Requires:       python3-oslo-upgradecheck >= 0.1.0
-Requires:       python3-oslo-utils >= 4.4.0
+Requires:       python3-oslo-service >= 1.31.0
+Requires:       python3-oslo-upgradecheck >= 1.3.0
+Requires:       python3-oslo-utils >= 4.5.0
 Requires:       python3-oslo-versionedobjects >= 1.35.1
 Requires:       python3-osprofiler >= 2.3.0
-Requires:       python3-ovsdbapp
+Requires:       python3-ovsdbapp >= 1.7.0
 Requires:       python3-pecan >= 1.3.2
 Requires:       python3-pbr >= 4.0.0
-Requires:       python3-psutil >= 3.2.2
+Requires:       python3-psutil >= 5.3.0
 Requires:       python3-pyroute2 >= 0.5.13
-Requires:       python3-requests >= 2.14.2
+Requires:       python3-requests >= 2.18.0
 Requires:       python3-tenacity >= 6.0.0
 Requires:       python3-routes >= 2.3.1
-Requires:       python3-os-ken >= 0.3.1
+Requires:       python3-os-ken >= 0.3.0
 Requires:       python3-sqlalchemy >= 1.2.0
 Requires:       python3-stevedore >= 1.20.0
 Requires:       python3-tooz >= 1.58.0
 Requires:       python3-webob >= 1.8.2
 Requires:       python3-openstacksdk >= 0.31.2
 Requires:       python3-pyOpenSSL >= 17.1.0
+Requires:       python3-packaging >= 20.4
+
 Requires:       python3-httplib2 >= 0.9.1
 Requires:       python3-netifaces >= 0.10.4
-Requires:       python3-paste
+Requires:       python3-paste >= 2.0.2
 Requires:       python3-paste-deploy >= 1.5.0
 Requires:       python3-decorator >= 3.4.0
 
-Provides:       python3-networking-ovn = %{epoch}:%{version}-%{release}
+Provides:       python3-networking-ovn = %{version}-%{release}
 
 
 %description -n python3-%{service}
-OpenStack Networking (Neutron)
+%{common_desc}
+
 This package contains the Neutron Python library.
 
+
 %package -n python3-%{service}-tests
 Summary:        Neutron tests
 %{?python_provide:%python_provide python3-%{service}-tests}
-Requires:       python3-%{service} = %{epoch}:%{version}-%{release}
+Requires:       python3-%{service} = %{version}-%{release}
 Requires:       python3-ddt >= 1.0.1
 Requires:       python3-fixtures >= 3.0.0
 Requires:       python3-mock >= 2.0
@@ -178,24 +217,34 @@ Requires:       python3-oslotest >= 1.10.0
 Requires:       python3-os-testr >= 0.7.0
 Requires:       python3-PyMySQL >= 0.6.2
 Requires:       python3-tempest >= 12.1.0
+
 Requires:       python3-webtest >= 2.0
+
+
+# pstree is used during functional testing to ensure our internal
+# libraries managing processes work correctly.
 Requires:       psmisc
+# nfs-utils is needed because it creates user with uid 65534 which
+# is required by neutron functional tests.
 Requires:       nfs-utils
 
+
 %description -n python3-%{service}-tests
-OpenStack Networking (Neutron)
+%{common_desc}
+
 This package contains Neutron test files.
 
 
 %package common
 Summary:        Neutron common files
 Requires(pre): shadow-utils
-Requires:       python3-%{service} = %{epoch}:%{version}-%{release}
+Requires:       python3-%{service} = %{version}-%{release}
 Requires:       sudo
 
 
 %description common
-OpenStack Networking (Neutron)
+%{common_desc}
+
 This package contains Neutron common files.
 
 
@@ -205,33 +254,44 @@ Requires:       ebtables
 Requires:       ipset
 Requires:       iproute
 Requires:       iptables
+# kmod is needed to get access to /usr/sbin/modprobe needed by
+# neutron-enable-bridge-firewall.sh triggered by the service unit file
 Requires:       kmod
-Requires:       openstack-%{service}-common = %{epoch}:%{version}-%{release}
+Requires:       openstack-%{service}-common = %{version}-%{release}
 
 
 %description linuxbridge
-OpenStack Networking (Neutron)
+%{common_desc}
+
 This package contains the Neutron agent that implements virtual
 networks using VLAN or VXLAN using Linuxbridge technology.
 
 
 %package macvtap-agent
 Summary:        Neutron macvtap agent
-Requires:       openstack-%{service}-common = %{epoch}:%{version}-%{release}
+Requires:       openstack-%{service}-common = %{version}-%{release}
 
 
 %description macvtap-agent
-OpenStack Networking (Neutron)
+%{common_desc}
+
 This package contains the Neutron agent that implements
 macvtap attachments for libvirt qemu/kvm instances.
 
 
 %package ml2
 Summary:        Neutron ML2 plugin
-Requires:       openstack-%{service}-common = %{epoch}:%{version}-%{release}
+Requires:       openstack-%{service}-common = %{version}-%{release}
+# needed for brocade and cisco drivers
+#(TODO) ncclient is not in reuirement projects so it should be requirement in neutron
+# plugin packages, not in main neutron. Remove this lines completely if everythin keeps
+# working.
+#Requires:       python3-ncclient
+
 
 %description ml2
-OpenStack Networking (Neutron)
+%{common_desc}
+
 This package contains a Neutron plugin that allows the use of drivers
 to support separately extensible sets of network types and the mechanisms
 for accessing those types.
@@ -239,16 +299,21 @@ for accessing those types.
 
 %package openvswitch
 Summary:        Neutron openvswitch plugin
-Requires:       openstack-%{service}-common = %{epoch}:%{version}-%{release}
+Requires:       openstack-%{service}-common = %{version}-%{release}
+# We require openvswitch when using vsctl to access ovsdb;
+# but if we use native access, then we just need python bindings.
+# since we don't know what users actually use, we depend on both.
 Requires:       ipset
 Requires:       iptables
 Requires:       openvswitch
-Requires:       python3-openvswitch >= 2.8.0
+Requires:       python3-openvswitch >= 2.10.0
+# kmod is needed to get access to /usr/sbin/modprobe needed by
+# neutron-enable-bridge-firewall.sh triggered by the service unit file
 Requires:       kmod
 
 
 %description openvswitch
-OpenStack Networking (Neutron)
+%{common_desc}
 
 This package contains the Neutron plugin that implements virtual
 networks using Open vSwitch.
@@ -257,33 +322,36 @@ networks using Open vSwitch.
 %package metering-agent
 Summary:        Neutron bandwidth metering agent
 Requires:       iptables
-Requires:       openstack-%{service}-common = %{epoch}:%{version}-%{release}
+Requires:       openstack-%{service}-common = %{version}-%{release}
 
 
 %description metering-agent
-OpenStack Networking (Neutron)
+%{common_desc}
+
 This package contains the Neutron agent responsible for generating bandwidth
 utilization notifications.
 
 
 %package rpc-server
 Summary:        Neutron (RPC only) Server
-Requires:       openstack-%{service}-common = %{epoch}:%{version}-%{release}
+Requires:       openstack-%{service}-common = %{version}-%{release}
 
 
 %description rpc-server
-OpenStack Networking (Neutron)
+%{common_desc}
+
 This package contains an alternative Neutron server that handles AMQP RPC
 workload only.
 
 
 %package sriov-nic-agent
 Summary:        Neutron SR-IOV NIC agent
-Requires:       openstack-%{service}-common = %{epoch}:%{version}-%{release}
+Requires:       openstack-%{service}-common = %{version}-%{release}
 
 
 %description sriov-nic-agent
-OpenStack Networking (Neutron)
+%{common_desc}
+
 This package contains the Neutron agent to support advanced features of
 SR-IOV network cards.
 
@@ -291,9 +359,9 @@ SR-IOV network cards.
 %package ovn-metadata-agent
 Summary:        OVN metadata agent
 BuildRequires:  systemd
-Requires:       python3-%{service} = %{epoch}:%{version}-%{release}
-Requires:       openvswitch >= 2.8.0
-Provides:       python3-networking-ovn-metadata-agent = %{epoch}:%{version}-%{release}
+Requires:       python3-%{service} = %{version}-%{release}
+Requires:       openvswitch >= 2.10.0
+Provides:       python3-networking-ovn-metadata-agent = %{version}-%{release}
 %{?systemd_requires}
 
 %description ovn-metadata-agent
@@ -305,8 +373,8 @@ can retrieve metadata from OpenStack Nova.
 
 %package ovn-migration-tool
 Summary:        networking-ovn ML2/OVS to OVN migration tool
-Requires:       python3-%{service} = %{epoch}:%{version}-%{release}
-Provides:       python3-networking-ovn-migration-tool = %{epoch}:%{version}-%{release}
+Requires:       python3-%{service} = %{version}-%{release}
+Provides:       python3-networking-ovn-migration-tool = %{version}-%{release}
 
 %description ovn-migration-tool
 
@@ -315,21 +383,26 @@ OpenStack to OVN based backend.
 
 
 %prep
-%autosetup -n %{service}-%{upstream_version} -S git
+%autosetup -n %{service}-%{upstream_version} -S git 
 sed -i 's/\/usr\/bin\/python/\/usr\/bin\/python3/' %{SOURCE36}
 
 find %{service} -name \*.py -exec sed -i '/\/usr\/bin\/env python/{d;q}' {} +
 
+# Let's handle dependencies ourseleves
 %py_req_cleanup
 
+# Kill egg-info in order to generate new SOURCES.txt
 rm -rf neutron.egg-info
 
 
 %build
 export SKIP_PIP_INSTALL=1
 %{py3_build}
+# Generate i18n files
+# (amoralej) we can remove '-D neutron' once https://review.openstack.org/#/c/485070/ is merged
 %{__python3} setup.py compile_catalog -d build/lib/%{service}/locale -D neutron
 
+# Generate configuration files
 PYTHONPATH=.
 for file in `ls etc/oslo-config-generator/*`; do
     oslo-config-generator --config-file=$file
@@ -342,6 +415,13 @@ do
     mv ${filename} ${filedir}/${file}
 done
 
+# Loop through values in neutron-dist.conf and make sure that the values
+# are substituted into the neutron.conf as comments. Some of these values
+# will have been uncommented as a way of upstream setting defaults outside
+# of the code. For notification_driver, there are commented examples
+# above uncommented settings, so this specifically skips those comments
+# and instead comments out the actual settings and substitutes the
+# correct default values.
 while read name eq value; do
   test "$name" && test "$value" || continue
   if [ "$name" = "notification_driver" ]; then
@@ -354,17 +434,21 @@ done < %{SOURCE30}
 %install
 %{py3_install}
 
+# Remove unused files
 rm -rf %{buildroot}%{python3_sitelib}/bin
 rm -rf %{buildroot}%{python3_sitelib}/doc
 rm -rf %{buildroot}%{python3_sitelib}/tools
 
+# Move rootwrap files to proper location
 install -d -m 755 %{buildroot}%{_datarootdir}/%{service}/rootwrap
 mv %{buildroot}/usr/etc/%{service}/rootwrap.d/*.filters %{buildroot}%{_datarootdir}/%{service}/rootwrap
 
+# Move config files to proper location
 install -d -m 755 %{buildroot}%{_sysconfdir}/%{service}
 mv %{buildroot}/usr/etc/%{service}/* %{buildroot}%{_sysconfdir}/%{service}
 mv %{buildroot}%{_sysconfdir}/%{service}/api-paste.ini %{buildroot}%{_datadir}/%{service}/api-paste.ini
 
+# The generated config files are not moved automatically by setup.py
 install -d -m 755 %{buildroot}%{_sysconfdir}/%{service}/plugins/ml2
 
 mv etc/%{service}.conf %{buildroot}%{_sysconfdir}/%{service}/%{service}.conf
@@ -378,17 +462,24 @@ do
   mv etc/%{service}/plugins/ml2/${file}.ini %{buildroot}%{_sysconfdir}/%{service}/plugins/ml2/${file}.ini
 done
 
+# (TODO) Backwards compatibility for networking-ovn-metadata-agent.ini
+
 install -d -m 755 %{buildroot}%{_sysconfdir}/neutron/plugins/networking-ovn
 ln -s /etc/neutron/neutron_ovn_metadata_agent.ini %{buildroot}%{_sysconfdir}/%{service}/plugins/networking-ovn/networking-ovn-metadata-agent.ini
 
+# (TODO) Backwards compatibility for ovn.ini
 ln -s /etc/neutron/ovn.ini %{buildroot}%{_sysconfdir}/%{service}/plugins/networking-ovn/networking-ovn.ini
 
+# (TODO) Backwards compatibility for networking-ovn-metadata-agent executable
 ln -s %{_bindir}/neutron-ovn-metadata-agent  %{buildroot}%{_bindir}/networking-ovn-metadata-agent
 
+# Install logrotate
 install -p -D -m 644 %{SOURCE1} %{buildroot}%{_sysconfdir}/logrotate.d/openstack-%{service}
 
+# Install sudoers
 install -p -D -m 440 %{SOURCE2} %{buildroot}%{_sysconfdir}/sudoers.d/%{service}
 
+# Install systemd units
 install -p -D -m 644 %{SOURCE10} %{buildroot}%{_unitdir}/neutron-server.service
 install -p -D -m 644 %{SOURCE11} %{buildroot}%{_unitdir}/neutron-linuxbridge-agent.service
 install -p -D -m 644 %{SOURCE12} %{buildroot}%{_unitdir}/neutron-openvswitch-agent.service
@@ -405,31 +496,42 @@ install -p -D -m 644 %{SOURCE32} %{buildroot}%{_unitdir}/neutron-linuxbridge-cle
 install -p -D -m 644 %{SOURCE36} %{buildroot}%{_unitdir}/neutron-destroy-patch-ports.service
 install -p -D -m 644 %{SOURCE37} %{buildroot}%{_unitdir}/neutron-ovn-metadata-agent.service
 
+# (TODO) - Backwards compatibility for systemd unit networking-ovn-metadata-agent
 
 ln -s %{_unitdir}/neutron-ovn-metadata-agent.service %{buildroot}%{_unitdir}/networking-ovn-metadata-agent.service
 
+# Install helper scripts
 install -p -D -m 755 %{SOURCE33} %{buildroot}%{_bindir}/neutron-enable-bridge-firewall.sh
 
+# Install sysctl and modprobe config files to enable bridge firewalling
+# NOTE(ihrachys) we effectively duplicate same settings for each affected l2
+# agent. This can be revisited later.
 install -p -D -m 644 %{SOURCE34} %{buildroot}%{_sysctldir}/99-neutron-openvswitch-agent.conf
 install -p -D -m 644 %{SOURCE34} %{buildroot}%{_sysctldir}/99-neutron-linuxbridge-agent.conf
 install -p -D -m 755 %{SOURCE35} %{buildroot}%{_sysconfdir}/sysconfig/modules/neutron-openvswitch-agent.modules
 install -p -D -m 755 %{SOURCE35} %{buildroot}%{_sysconfdir}/sysconfig/modules/neutron-linuxbridge-agent.modules
 
+# Install README file that describes how to configure services with custom configuration files
 install -p -D -m 755 %{SOURCE31} %{buildroot}%{_sysconfdir}/%{service}/conf.d/README
 
+# Setup directories
 install -d -m 755 %{buildroot}%{_datadir}/%{service}
 install -d -m 755 %{buildroot}%{_sharedstatedir}/%{service}
 install -d -m 755 %{buildroot}%{_localstatedir}/log/%{service}
 install -d -m 755 %{buildroot}%{_localstatedir}/run/%{service}
 install -d -m 755 %{buildroot}%{_sysconfdir}/%{service}/kill_scripts
 
+# Install dist conf
 install -p -D -m 640 %{SOURCE30} %{buildroot}%{_datadir}/%{service}/%{service}-dist.conf
 
+# Create and populate configuration directory for L3 agent that is not accessible for user modification
 mkdir -p %{buildroot}%{_datadir}/%{service}/l3_agent
 ln -s %{_sysconfdir}/%{service}/l3_agent.ini %{buildroot}%{_datadir}/%{service}/l3_agent/l3_agent.conf
 
+# Create dist configuration directory for neutron-server (may be filled by advanced services)
 mkdir -p %{buildroot}%{_datadir}/%{service}/server
 
+# Create configuration directories for all services that can be populated by users with custom *.conf files
 mkdir -p %{buildroot}/%{_sysconfdir}/%{service}/conf.d/common
 for service in server rpc-server ovs-cleanup netns-cleanup linuxbridge-cleanup macvtap-agent; do
     mkdir -p %{buildroot}/%{_sysconfdir}/%{service}/conf.d/%{service}-$service
@@ -438,11 +540,13 @@ for service in linuxbridge openvswitch dhcp l3 metadata metering sriov-nic ovn-m
     mkdir -p %{buildroot}/%{_sysconfdir}/%{service}/conf.d/%{service}-$service-agent
 done
 
+# Install i18n .mo files (.po and .pot are not required)
 install -d -m 755 %{buildroot}%{_datadir}
 rm -f %{buildroot}%{python3_sitelib}/%{service}/locale/*/LC_*/%{service}*po
 rm -f %{buildroot}%{python3_sitelib}/%{service}/locale/*pot
 mv %{buildroot}%{python3_sitelib}/%{service}/locale %{buildroot}%{_datadir}/locale
 
+# Find language files
 %find_lang %{service} --all-name
 
 %pre common
@@ -511,13 +615,20 @@ exit 0
 %systemd_post neutron-destroy-patch-ports.service
 
 if [ $1 -ge 2 ]; then
+    # We're upgrading
+
+    # Detect if the neutron-openvswitch-agent is running
     ovs_agent_running=0
     systemctl status neutron-openvswitch-agent > /dev/null 2>&1 && ovs_agent_running=1 || :
 
+    # If agent is running, stop it
     [ $ovs_agent_running -eq 1 ] && systemctl stop neutron-openvswitch-agent > /dev/null 2>&1 || :
 
+    # Search all orphaned neutron-rootwrap-daemon processes and since all are triggered by sudo,
+    # get the actual rootwrap-daemon process.
     %cleanup_orphan_rootwrap_daemons
 
+    # If agent was running, start it back with new code
     [ $ovs_agent_running -eq 1 ] && systemctl start neutron-openvswitch-agent > /dev/null 2>&1 || :
 fi
 
@@ -624,6 +735,8 @@ fi
 %files common -f %{service}.lang
 %license LICENSE
 %doc README.rst
+# though this script is not exactly needed on all nodes but for ovs and
+# linuxbridge agents only, it's probably good enough to put it here
 %{_bindir}/neutron-enable-bridge-firewall.sh
 %{_bindir}/neutron-rootwrap
 %{_bindir}/neutron-rootwrap-daemon
@@ -646,9 +759,7 @@ fi
 %{_datarootdir}/%{service}/rootwrap/debug.filters
 %{_datarootdir}/%{service}/rootwrap/dhcp.filters
 %{_datarootdir}/%{service}/rootwrap/dibbler.filters
-%{_datarootdir}/%{service}/rootwrap/ebtables.filters
 %{_datarootdir}/%{service}/rootwrap/ipset-firewall.filters
-%{_datarootdir}/%{service}/rootwrap/iptables-firewall.filters
 %{_datarootdir}/%{service}/rootwrap/l3.filters
 %{_datarootdir}/%{service}/rootwrap/privsep.filters
 
@@ -737,5 +848,9 @@ fi
 %{_datadir}/ansible/neutron-ovn-migration/
 
 %changelog
+* Fri Jul 23 2021 liksh <liks11@chinaunicom.cn> 1:18.1.0-1
+- Update to 18.1.0
+
 * Fri Jan 15 2021 joec88 <joseph.chn1988@gmail.com> 1:17.0.0-1
 - openEuler build release
+