diff --git a/vmware_nsxlib/tests/unit/v3/policy/test_resources.py b/vmware_nsxlib/tests/unit/v3/policy/test_resources.py
index dcc9f11e..fe9bd3b6 100644
--- a/vmware_nsxlib/tests/unit/v3/policy/test_resources.py
+++ b/vmware_nsxlib/tests/unit/v3/policy/test_resources.py
@@ -4635,6 +4635,7 @@ class TestPolicySegmentPort(NsxPolicyLibTestCase):
         tags = [{'scope': 'a', 'tag': 'b'}]
         hyperbus_mode = 'DISABLE'
         admin_state = True
+        init_state = 'VIF_RESTORE'
 
         with mock.patch.object(
             self.policy_api, "create_or_update") as api_call, \
@@ -4648,7 +4649,8 @@ class TestPolicySegmentPort(NsxPolicyLibTestCase):
                 allocate_addresses=allocate_addresses,
                 hyperbus_mode=hyperbus_mode, admin_state=admin_state,
                 tags=tags,
-                tenant=TEST_TENANT)
+                tenant=TEST_TENANT,
+                init_state=init_state)
 
             expected_def = core_defs.SegmentPortDef(
                 nsx_version=nsxlib_testcase.LATEST_VERSION,
@@ -4666,7 +4668,8 @@ class TestPolicySegmentPort(NsxPolicyLibTestCase):
                 admin_state=admin_state,
                 tags=tags,
                 tenant=TEST_TENANT,
-                hyperbus_mode=hyperbus_mode)
+                hyperbus_mode=hyperbus_mode,
+                init_state=init_state)
 
             self.assert_called_with_def(api_call, expected_def)
             self.assertIsNotNone(result)
@@ -4684,6 +4687,7 @@ class TestPolicySegmentPort(NsxPolicyLibTestCase):
         allocate_addresses = "BOTH"
         tags = [{'scope': 'a', 'tag': 'b'}]
         hyperbus_mode = 'DISABLE'
+        init_state = 'VIF_RESTORE'
 
         with mock.patch.object(
             self.policy_api, "create_or_update") as api_call, \
@@ -4694,7 +4698,8 @@ class TestPolicySegmentPort(NsxPolicyLibTestCase):
                 attachment_type=attachment_type, vif_id=vif_id, app_id=app_id,
                 context_id=context_id, traffic_tag=traffic_tag,
                 allocate_addresses=allocate_addresses, tags=tags,
-                tenant=TEST_TENANT, hyperbus_mode=hyperbus_mode)
+                tenant=TEST_TENANT, hyperbus_mode=hyperbus_mode,
+                init_state=init_state)
             expected_def = core_defs.SegmentPortDef(
                 nsx_version=self.policy_lib.get_version(),
                 segment_id=segment_id,
@@ -4714,6 +4719,38 @@ class TestPolicySegmentPort(NsxPolicyLibTestCase):
             self.assert_called_with_def(api_call, expected_def)
             self.assertIsNotNone(result)
 
+    def test_create_with_invalid_init_state(self):
+        name = 'test'
+        description = 'desc'
+        segment_id = "segment"
+        address_bindings = []
+        attachment_type = "CHILD"
+        vif_id = "vif"
+        app_id = "app"
+        context_id = "context"
+        traffic_tag = 10
+        allocate_addresses = "BOTH"
+        tags = [{'scope': 'a', 'tag': 'b'}]
+        hyperbus_mode = 'DISABLE'
+        init_state = 'OK'
+
+        with mock.patch.object(
+            self.policy_api, "create_or_update") as api_call, \
+            mock.patch.object(self.resourceApi, 'version',
+                              nsxlib_testcase.LATEST_VERSION):
+            with self.assertRaises(nsxlib_exc.InvalidInput):
+                self.resourceApi.create_or_overwrite(
+                    name, segment_id, description=description,
+                    address_bindings=address_bindings,
+                    attachment_type=attachment_type, vif_id=vif_id,
+                    app_id=app_id,
+                    context_id=context_id, traffic_tag=traffic_tag,
+                    allocate_addresses=allocate_addresses, tags=tags,
+                    tenant=TEST_TENANT, hyperbus_mode=hyperbus_mode,
+                    init_state=init_state)
+                actual_def = api_call.call_args_list[0][0][0]
+                actual_def.get_obj_dict()
+
     def test_attach(self):
         segment_id = "segment"
         port_id = "port"
diff --git a/vmware_nsxlib/v3/nsx_constants.py b/vmware_nsxlib/v3/nsx_constants.py
index 4c5882b3..25a0cd80 100644
--- a/vmware_nsxlib/v3/nsx_constants.py
+++ b/vmware_nsxlib/v3/nsx_constants.py
@@ -33,6 +33,10 @@ VIF_TYPE_CHILD = "CHILD"
 
 ALLOCATE_ADDRESS_NONE = "None"
 
+# SegmentPort init_state types
+INIT_STATE_UNBLOCKED_VLAN = 'UNBLOCKED_VLAN'
+INIT_STATE_VIF_RESTORE = 'VIF_RESTORE'
+
 # NSXv3 L2 Gateway constants
 BRIDGE_ENDPOINT = "BRIDGEENDPOINT"
 FAILOVER_MODE_PREEMPTIVE = "PREEMPTIVE"
diff --git a/vmware_nsxlib/v3/policy/core_defs.py b/vmware_nsxlib/v3/policy/core_defs.py
index 07f1c95e..91ba53a9 100644
--- a/vmware_nsxlib/v3/policy/core_defs.py
+++ b/vmware_nsxlib/v3/policy/core_defs.py
@@ -20,6 +20,7 @@ from distutils import version
 from oslo_log import log as logging
 import six
 
+from vmware_nsxlib.v3 import exceptions
 from vmware_nsxlib.v3 import nsx_constants
 from vmware_nsxlib.v3.policy import constants
 from vmware_nsxlib.v3 import utils
@@ -1152,12 +1153,25 @@ class SegmentPortDef(ResourceDef):
             self._set_attr_if_specified(body, 'admin_state',
                                         value=admin_state)
 
+        if (self.has_attr('init_state') and
+            self._version_dependant_attr_supported('init_state')):
+            valid_list = [nsx_constants.INIT_STATE_UNBLOCKED_VLAN,
+                          nsx_constants.INIT_STATE_VIF_RESTORE]
+            init_state = self.get_attr('init_state')
+            if init_state not in valid_list:
+                raise exceptions.InvalidInput(
+                    operation='create_segment_port',
+                    arg_val=init_state,
+                    arg_name='init_state')
+            self._set_attr_if_specified(body, 'init_state')
+
         return body
 
     @property
     def version_dependant_attr_map(self):
         return {'hyperbus_mode': nsx_constants.NSX_VERSION_3_0_0,
-                'admin_state': nsx_constants.NSX_VERSION_3_0_0}
+                'admin_state': nsx_constants.NSX_VERSION_3_0_0,
+                'init_state': nsx_constants.NSX_VERSION_3_1_0}
 
 
 class SegmentBindingMapDefBase(ResourceDef):
diff --git a/vmware_nsxlib/v3/policy/core_resources.py b/vmware_nsxlib/v3/policy/core_resources.py
index a676e5c9..51d1ee00 100644
--- a/vmware_nsxlib/v3/policy/core_resources.py
+++ b/vmware_nsxlib/v3/policy/core_resources.py
@@ -2145,6 +2145,7 @@ class NsxPolicySegmentPortApi(NsxPolicyResourceBase):
                             allocate_addresses=IGNORE,
                             hyperbus_mode=IGNORE,
                             admin_state=IGNORE,
+                            init_state=IGNORE,
                             tags=IGNORE,
                             tenant=constants.POLICY_INFRA_TENANT):
 
@@ -2162,6 +2163,7 @@ class NsxPolicySegmentPortApi(NsxPolicyResourceBase):
                                   allocate_addresses=allocate_addresses,
                                   hyperbus_mode=hyperbus_mode,
                                   admin_state=admin_state,
+                                  init_state=init_state,
                                   tags=tags,
                                   tenant=tenant)
         self._create_or_store(port_def)