diff --git a/vmware_nsx/plugins/nsx_p/plugin.py b/vmware_nsx/plugins/nsx_p/plugin.py
index 65d8da849c..64e0916783 100644
--- a/vmware_nsx/plugins/nsx_p/plugin.py
+++ b/vmware_nsx/plugins/nsx_p/plugin.py
@@ -1386,17 +1386,16 @@ class NsxPolicyPlugin(nsx_plugin_common.NsxPluginV3Base):
 
     def _validate_subnet_gw_ip(self, context, subnet, orig_subnet=None):
         # Make sure the gw ip is legal and belongs to the subnet
-        raw_gw_ip = subnet.get('gateway_ip')
+        raw_gw_ip = subnet.get('gateway_ip', const.ATTR_NOT_SPECIFIED)
         if orig_subnet and raw_gw_ip == const.ATTR_NOT_SPECIFIED:
             # No change in GW ip
             raw_gw_ip = orig_subnet.get('gateway_ip')
-        raw_cidr = subnet.get('cidr')
+        raw_cidr = subnet.get('cidr', const.ATTR_NOT_SPECIFIED)
         if (orig_subnet and
             (not raw_cidr or raw_cidr == const.ATTR_NOT_SPECIFIED)):
             raw_cidr = orig_subnet.get('cidr')
         if (not raw_gw_ip or raw_gw_ip == const.ATTR_NOT_SPECIFIED or
             not raw_cidr or raw_cidr == const.ATTR_NOT_SPECIFIED):
-
             if orig_subnet and raw_gw_ip is None:
                 # in update case, if the subnet is attached to a router the gw
                 # cannot be removes
@@ -1408,6 +1407,7 @@ class NsxPolicyPlugin(nsx_plugin_common.NsxPluginV3Base):
                         if orig_subnet['id'] == interface_sub:
                             msg = _('Subnet for router interface must have a '
                                     'gateway IP')
+                            LOG.error(msg)
                             raise n_exc.BadRequest(resource='router', msg=msg)
             # Nothing else to check here
             return