diff --git a/sysinv/sysinv/sysinv/sysinv/api/controllers/v1/interface.py b/sysinv/sysinv/sysinv/sysinv/api/controllers/v1/interface.py
index 4617cc3d17..9547aeb91d 100644
--- a/sysinv/sysinv/sysinv/sysinv/api/controllers/v1/interface.py
+++ b/sysinv/sysinv/sysinv/sysinv/api/controllers/v1/interface.py
@@ -776,26 +776,35 @@ def _set_defaults(interface):
                 'vlan_id': None,
                 'sriov_numvfs': 0}
 
+    networktypelist = []
     if interface['ifclass'] == constants.INTERFACE_CLASS_PLATFORM:
         if interface['networks']:
             for network_id in interface['networks']:
                 network = pecan.request.dbapi.network_get_by_id(network_id)
-                interface['networktype'] = network.type
-                break
+                networktypelist.append(network.type)
+            interface['networktype'] = ",".join(networktypelist)
         elif interface['networktype']:
-            network = pecan.request.dbapi.network_get_by_type(
-                interface['networktype']
-            )
-            interface['networks'] = [str(network.id)]
+            networks = []
+            networktypelist = interface['networktype'].split(',')
+            for network_type in networktypelist:
+                if network_type in constants.PLATFORM_NETWORK_TYPES:
+                    network = pecan.request.dbapi.network_get_by_type(
+                        network_type
+                    )
+                    networks.append(str(network.id))
+            interface['networks'] = networks
 
-    networktype = interface['networktype']
+    family_defaults = [constants.NETWORK_TYPE_MGMT,
+                       constants.NETWORK_TYPE_OAM,
+                       constants.NETWORK_TYPE_INFRA]
     if interface['ifclass'] == constants.INTERFACE_CLASS_DATA:
         defaults['ipv4_mode'] = constants.IPV4_DISABLED
         defaults['ipv6_mode'] = constants.IPV6_DISABLED
-    elif (networktype == constants.NETWORK_TYPE_MGMT or
-          networktype == constants.NETWORK_TYPE_OAM or
-          networktype == constants.NETWORK_TYPE_INFRA):
-        _set_address_family_defaults_by_pool(defaults, networktype)
+    else:
+        for network_type in networktypelist:
+            if network_type in family_defaults:
+                _set_address_family_defaults_by_pool(defaults,
+                                                     network_type)
 
     interface_merged = interface.copy()
     for key in interface_merged:
@@ -987,8 +996,8 @@ def _check_network_type_and_host_type(ihost, networktypelist):
 
 def _check_network_type_and_interface_type(interface, networktypelist):
     if interface['iftype'] == 'vlan':
-        if not networktypelist or constants.NETWORK_TYPE_NONE in networktypelist:
-            msg = _("VLAN interfaces cannot have a network type of '%s'." %
+        if constants.NETWORK_TYPE_NONE in networktypelist:
+            msg = _("VLAN interfaces cannot have an interface class of %s." %
                     constants.NETWORK_TYPE_NONE)
             raise wsme.exc.ClientSideError(msg)
 
diff --git a/sysinv/sysinv/sysinv/sysinv/api/controllers/v1/interface_network.py b/sysinv/sysinv/sysinv/sysinv/api/controllers/v1/interface_network.py
index 1d24c3a851..9d77ea59b7 100644
--- a/sysinv/sysinv/sysinv/sysinv/api/controllers/v1/interface_network.py
+++ b/sysinv/sysinv/sysinv/sysinv/api/controllers/v1/interface_network.py
@@ -301,10 +301,4 @@ class InterfaceNetworkController(rest.RestController):
     @cutils.synchronized(LOCK_NAME)
     @wsme_pecan.wsexpose(None, types.uuid, status_code=204)
     def delete(self, interface_network_uuid):
-        interface_network = self._get_one(interface_network_uuid)
         pecan.request.dbapi.interface_network_destroy(interface_network_uuid)
-        interface_networks = pecan.request.dbapi.interface_network_get_by_interface(
-            interface_network.interface_uuid)
-        if not interface_networks:
-            values = {'ifclass': None}
-            pecan.request.dbapi.iinterface_update(interface_network.interface_uuid, values)
diff --git a/sysinv/sysinv/sysinv/sysinv/tests/api/test_interface.py b/sysinv/sysinv/sysinv/sysinv/tests/api/test_interface.py
index 51d3723af4..36d11dc1e1 100644
--- a/sysinv/sysinv/sysinv/sysinv/tests/api/test_interface.py
+++ b/sysinv/sysinv/sysinv/sysinv/tests/api/test_interface.py
@@ -280,6 +280,10 @@ class InterfaceTestCase(base.FunctionalTest):
             for network_type in networktypelist:
                 network = self.dbapi.network_get_by_type(network_type)
                 networks.append(str(network.id))
+        elif ifclass == constants.INTERFACE_CLASS_PLATFORM and \
+            any(network_type not in constants.PLATFORM_NETWORK_TYPES
+                for network_type in networktypelist):
+            ifclass = networktype
         if not ifclass and networktype:
             ifclass = networktype
         port_id = len(self.profile['ports'])
@@ -338,6 +342,10 @@ class InterfaceTestCase(base.FunctionalTest):
             for network_type in networktypelist:
                 network = self.dbapi.network_get_by_type(network_type)
                 networks.append(str(network.id))
+        elif ifclass == constants.INTERFACE_CLASS_PLATFORM and \
+            any(network_type not in constants.PLATFORM_NETWORK_TYPES
+                for network_type in networktypelist):
+            ifclass = networktype
         if not ifclass and networktype:
             ifclass = networktype
         interface = dbutils.post_get_test_interface(
@@ -395,6 +403,10 @@ class InterfaceTestCase(base.FunctionalTest):
             for network_type in networktypelist:
                 network = self.dbapi.network_get_by_type(network_type)
                 networks.append(str(network.id))
+        elif ifclass == constants.INTERFACE_CLASS_PLATFORM and \
+            any(network_type not in constants.PLATFORM_NETWORK_TYPES
+                for network_type in networktypelist):
+            ifclass = networktype
         if not ifclass and networktype:
             ifclass = networktype
         interface = dbutils.post_get_test_interface(