diff --git a/manifests/agents/ml2/ovn.pp b/manifests/agents/ml2/ovn.pp
index 7460c054f..f9bf4d8d6 100644
--- a/manifests/agents/ml2/ovn.pp
+++ b/manifests/agents/ml2/ovn.pp
@@ -15,7 +15,11 @@
 #   Defaults to true
 #
 # [*debug*]
-#   Debug. Defaults to $facts['os_service_default'].
+#   (optional) Debug. Defaults to $facts['os_service_default'].
+#
+# [*extensions*]
+#   (optional) Extension list to use.
+#   Defaults to $facts['os_service_default']
 #
 # [*ovsdb_connection*]
 #   (optional) The URI used to connect to the local OVSDB server.
@@ -105,6 +109,7 @@ class neutron::agents::ml2::ovn (
   Boolean $enabled          = true,
   Boolean $manage_service   = true,
   $debug                    = $facts['os_service_default'],
+  $extensions               = $facts['os_service_default'],
   $ovsdb_connection         = 'tcp:127.0.0.1:6640',
   $ovs_manager              = 'ptcp:6640:127.0.0.1',
   $ovn_nb_connection        = $facts['os_service_default'],
@@ -135,6 +140,7 @@ class neutron::agents::ml2::ovn (
   neutron_agent_ovn {
     'DEFAULT/debug':                value => $debug;
     'DEFAULT/state_path':           value => $state_path;
+    'agent/extensions':             value => join(any2array($extensions), ',');
     'agent/root_helper':            value => $root_helper;
     'agent/root_helper_daemon':     value => $root_helper_daemon;
     'ovs/ovsdb_connection':         value => $ovsdb_connection;
diff --git a/releasenotes/notes/ovn-agent-extensions-cee9f88173a4c123.yaml b/releasenotes/notes/ovn-agent-extensions-cee9f88173a4c123.yaml
new file mode 100644
index 000000000..84fd50fae
--- /dev/null
+++ b/releasenotes/notes/ovn-agent-extensions-cee9f88173a4c123.yaml
@@ -0,0 +1,4 @@
+---
+features:
+  - |
+    The new ``neutron::agents::ml2::ovn::extensions`` parameter has been added.
diff --git a/spec/classes/neutron_agents_ml2_ovn_spec.rb b/spec/classes/neutron_agents_ml2_ovn_spec.rb
index fa4c22b3b..756a0b6f9 100644
--- a/spec/classes/neutron_agents_ml2_ovn_spec.rb
+++ b/spec/classes/neutron_agents_ml2_ovn_spec.rb
@@ -38,6 +38,7 @@ describe 'neutron::agents::ml2::ovn' do
     it 'configures ovn_agent.ini' do
       should contain_neutron_agent_ovn('DEFAULT/debug').with(:value => '<SERVICE DEFAULT>')
       should contain_neutron_agent_ovn('DEFAULT/state_path').with(:value => '/var/lib/neutron')
+      should contain_neutron_agent_ovn('agent/extensions').with(:value => '<SERVICE DEFAULT>')
       should contain_neutron_agent_ovn('agent/root_helper').with(:value => 'sudo neutron-rootwrap /etc/neutron/rootwrap.conf')
       should contain_neutron_agent_ovn('agent/root_helper_daemon').with(:value => '<SERVICE DEFAULT>')
       should contain_neutron_agent_ovn('ovs/ovsdb_connection').with(:value => 'tcp:127.0.0.1:6640')