diff --git a/config.yaml b/config.yaml
index b3bf50da..b4938fc3 100755
--- a/config.yaml
+++ b/config.yaml
@@ -267,6 +267,15 @@ options:
       when using an overlay/tunnel protocol. This option allows
       specifying a physical network MTU value that differs from the
       default global-physnet-mtu value.
+  physical-network-mtus:
+     type: string
+     default:
+     description: |
+      Space-delimited list of <physical_network>:<mtu> pairs specifying MTU for
+      individual physical networks.
+      .
+      Use this if a subset of your flat or VLAN provider networks have a MTU
+      that differ with what is set in global-physnet-mtu.
   dns-domain:
     type: string
     default: openstack.example.
diff --git a/hooks/neutron_api_context.py b/hooks/neutron_api_context.py
index 4b7ae3fe..5eec6324 100644
--- a/hooks/neutron_api_context.py
+++ b/hooks/neutron_api_context.py
@@ -432,6 +432,10 @@ class NeutronCCContext(context.NeutronContext):
                     ctxt['path_mtu'] = config('path-mtu')
                 else:
                     ctxt['path_mtu'] = config('global-physnet-mtu')
+                physical_network_mtus = config('physical-network-mtus')
+                if physical_network_mtus:
+                    ctxt['physical_network_mtus'] = ','.join(
+                        physical_network_mtus.split())
 
         if 'kilo' <= cmp_release <= 'mitaka':
             pci_vendor_devs = config('supported-pci-vendor-devs')
diff --git a/templates/mitaka/ml2_conf.ini b/templates/mitaka/ml2_conf.ini
index f1252526..bb5a2848 100644
--- a/templates/mitaka/ml2_conf.ini
+++ b/templates/mitaka/ml2_conf.ini
@@ -16,6 +16,9 @@ type_drivers = {{ tenant_network_types }}
 tenant_network_types = {{ tenant_network_types }}
 mechanism_drivers = {{ mechanism_drivers }}
 
+{% if physical_network_mtus -%}
+physical_network_mtus = {{ physical_network_mtus }}
+{% endif -%}
 {% if path_mtu -%}
 path_mtu = {{ path_mtu }}
 {% endif -%}
diff --git a/unit_tests/test_neutron_api_context.py b/unit_tests/test_neutron_api_context.py
index 1ed65a71..a9b0e14a 100644
--- a/unit_tests/test_neutron_api_context.py
+++ b/unit_tests/test_neutron_api_context.py
@@ -450,6 +450,48 @@ class NeutronCCContextTest(CharmTestCase):
         with patch.object(napi_ctxt, '_ensure_packages'):
             self.assertEqual(ctxt_data, napi_ctxt())
 
+    @patch.object(context.NeutronCCContext, 'network_manager')
+    @patch.object(context.NeutronCCContext, 'plugin')
+    @patch('builtins.__import__')
+    def test_neutroncc_context_no_setting_mitaka(self, _import, plugin, nm):
+        plugin.return_value = None
+        ctxt_data = {
+            'debug': True,
+            'enable_dvr': False,
+            'l3_ha': False,
+            'mechanism_drivers': 'openvswitch,hyperv,l2population',
+            'dhcp_agents_per_network': 3,
+            'enable_sriov': False,
+            'external_network': 'bob',
+            'global_physnet_mtu': 1500,
+            'neutron_bind_port': self.api_port,
+            'verbose': True,
+            'l2_population': True,
+            'overlay_network_type': 'gre',
+            'path_mtu': 1500,
+            'tenant_network_types': 'gre,vlan,flat,local',
+            'quota_floatingip': 50,
+            'quota_health_monitors': -1,
+            'quota_member': -1,
+            'quota_network': 10,
+            'quota_pool': 10,
+            'quota_port': 50,
+            'quota_router': 10,
+            'quota_security_group': 10,
+            'quota_security_group_rule': 100,
+            'quota_subnet': 10,
+            'quota_vip': 10,
+            'vlan_ranges': 'physnet1:1000:2000',
+            'vni_ranges': '1001:2000',
+            'extension_drivers': 'port_security',
+            'service_plugins': 'router,firewall,lbaas,vpnaas,metering',
+        }
+        napi_ctxt = context.NeutronCCContext()
+        self.maxDiff = None
+        self.os_release.return_value = 'mitaka'
+        with patch.object(napi_ctxt, '_ensure_packages'):
+            self.assertEqual(ctxt_data, napi_ctxt())
+
     @patch.object(context.NeutronCCContext, 'network_manager')
     @patch.object(context.NeutronCCContext, 'plugin')
     def test_neutroncc_context_dns_setting(self, plugin, nm):
@@ -810,6 +852,30 @@ class NeutronCCContextTest(CharmTestCase):
         self.assertEqual(context.NeutronCCContext()()['service_plugins'],
                          service_plugins)
 
+    @patch.object(context.NeutronCCContext, 'network_manager')
+    @patch.object(context.NeutronCCContext, 'plugin')
+    def test_neutroncc_context_physical_network_mtus(self, plugin, nm):
+        plugin.return_value = None
+        self.test_config.set('physical-network-mtus', 'provider1:4000')
+        self.os_release.return_value = 'mitaka'
+        napi_ctxt = context.NeutronCCContext()
+        with patch.object(napi_ctxt, '_ensure_packages'):
+            ctxt = napi_ctxt()
+            self.assertEqual(ctxt['physical_network_mtus'], 'provider1:4000')
+
+    @patch.object(context.NeutronCCContext, 'network_manager')
+    @patch.object(context.NeutronCCContext, 'plugin')
+    def test_neutroncc_context_physical_network_mtus_multi(self, plugin, nm):
+        plugin.return_value = None
+        self.test_config.set('physical-network-mtus',
+                             'provider1:4000 provider2:5000')
+        self.os_release.return_value = 'mitaka'
+        napi_ctxt = context.NeutronCCContext()
+        with patch.object(napi_ctxt, '_ensure_packages'):
+            ctxt = napi_ctxt()
+            self.assertEqual(ctxt['physical_network_mtus'],
+                             'provider1:4000,provider2:5000')
+
 
 class EtcdContextTest(CharmTestCase):