diff --git a/neutron/agent/l3/dvr_local_router.py b/neutron/agent/l3/dvr_local_router.py
index af5ce59f792..4f753685cdb 100644
--- a/neutron/agent/l3/dvr_local_router.py
+++ b/neutron/agent/l3/dvr_local_router.py
@@ -336,6 +336,19 @@ class DvrLocalRouter(dvr_router_base.DvrRouterBase):
                                            'add',
                                            device=device,
                                            device_exists=device_exists)
+
+        # subnet_ports does not have snat port if the port is still unbound
+        # by the time this function is called. So ensure to add arp entry
+        # for snat port if port details are updated in router info.
+        for p in self.get_snat_interfaces():
+            for fixed_ip in p['fixed_ips']:
+                if fixed_ip['subnet_id'] == subnet_id:
+                    self._update_arp_entry(fixed_ip['ip_address'],
+                                           p['mac_address'],
+                                           subnet_id,
+                                           'add',
+                                           device=device,
+                                           device_exists=device_exists)
         self._process_arp_cache_for_internal_port(subnet_id)
 
     @staticmethod
diff --git a/neutron/tests/unit/agent/l3/test_agent.py b/neutron/tests/unit/agent/l3/test_agent.py
index 30e3caa8a35..8154dd3dbe0 100644
--- a/neutron/tests/unit/agent/l3/test_agent.py
+++ b/neutron/tests/unit/agent/l3/test_agent.py
@@ -1271,6 +1271,7 @@ class TestBasicRouterOperations(BasicRouterOperationsFramework):
             router[lib_constants.INTERFACE_KEY][0])
         ri.router['distributed'] = True
         ri.router['_snat_router_interfaces'] = [{
+            'mac_address': 'fa:16:3e:80:8d:80',
             'fixed_ips': [{'subnet_id': subnet_id,
                            'ip_address': '1.2.3.4'}]}]
         ri.router['gw_port_host'] = None
diff --git a/neutron/tests/unit/agent/l3/test_dvr_local_router.py b/neutron/tests/unit/agent/l3/test_dvr_local_router.py
index 4c913815bbe..d30e5ced38f 100644
--- a/neutron/tests/unit/agent/l3/test_dvr_local_router.py
+++ b/neutron/tests/unit/agent/l3/test_dvr_local_router.py
@@ -545,6 +545,11 @@ class TestDvrRouterOperations(base.BaseTestCase):
         ri = dvr_router.DvrLocalRouter(HOSTNAME, **self.ri_kwargs)
         ports = ri.router.get(lib_constants.INTERFACE_KEY, [])
         subnet_id = l3_test_common.get_subnet_id(ports[0])
+        ri.router['_snat_router_interfaces'] = [{
+            'mac_address': 'fa:16:3e:80:8d:80',
+            'fixed_ips': [{'subnet_id': subnet_id,
+                           'ip_address': '1.2.3.10'}]}]
+
         test_ports = [{'mac_address': '00:11:22:33:44:55',
                        'device_owner': lib_constants.DEVICE_OWNER_DHCP,
                        'fixed_ips': [{'ip_address': '1.2.3.4',
@@ -576,7 +581,8 @@ class TestDvrRouterOperations(base.BaseTestCase):
         self.assertEqual(1, parp.call_count)
         self.mock_ip_dev.neigh.add.assert_has_calls([
             mock.call('1.2.3.4', '00:11:22:33:44:55'),
-            mock.call('10.20.30.40', '00:11:22:33:44:55')])
+            mock.call('10.20.30.40', '00:11:22:33:44:55'),
+            mock.call('1.2.3.10', 'fa:16:3e:80:8d:80')])
 
         # Test negative case
         router['distributed'] = False