diff --git a/ansible/roles/neutron/templates/ml2_conf.ini.j2 b/ansible/roles/neutron/templates/ml2_conf.ini.j2
index e55423e33c..9c70eb898a 100644
--- a/ansible/roles/neutron/templates/ml2_conf.ini.j2
+++ b/ansible/roles/neutron/templates/ml2_conf.ini.j2
@@ -40,4 +40,5 @@ ovn_nb_connection = {{ ovn_nb_connection }}
 ovn_sb_connection = {{ ovn_sb_connection }}
 ovn_metadata_enabled = True
 enable_distributed_floating_ip = {{ neutron_ovn_distributed_fip | bool }}
+ovn_emit_need_to_frag = True
 {% endif %}
diff --git a/releasenotes/notes/ovn-emit-need-to-frag-2d6695596042db18.yaml b/releasenotes/notes/ovn-emit-need-to-frag-2d6695596042db18.yaml
new file mode 100644
index 0000000000..5292574b83
--- /dev/null
+++ b/releasenotes/notes/ovn-emit-need-to-frag-2d6695596042db18.yaml
@@ -0,0 +1,7 @@
+---
+upgrade:
+  - |
+    Enabled ``ovn_emit_need_to_frag`` setting by default. It is useful when
+    external network's MTU is lower then internal geneve networks.
+    Host kernel needs to be in version >= 5.2 for this option to work.
+    All Kolla supported host operating systems have higher kernel version.