diff --git a/vmware_nsxlib/tests/unit/v3/policy/test_resources.py b/vmware_nsxlib/tests/unit/v3/policy/test_resources.py
index ef8b288f..e3943508 100644
--- a/vmware_nsxlib/tests/unit/v3/policy/test_resources.py
+++ b/vmware_nsxlib/tests/unit/v3/policy/test_resources.py
@@ -3336,6 +3336,54 @@ class TestPolicyTier1(NsxPolicyLibTestCase):
 
             self.assert_called_with_def(api_call, expected_def)
 
+    def test_get_multicast(self):
+        tier1_id = '111'
+        with mock.patch.object(self.policy_api, "get") as api_call:
+            api_call.return_value = {'enabled': True}
+            enabled = self.resourceApi.get_multicast(
+                tier1_id,
+                tenant=TEST_TENANT)
+
+            expected_def = core_defs.Tier1MulticastDef(
+                tier1_id=tier1_id,
+                service_id=self.resourceApi._locale_service_id(tier1_id),
+                tenant=TEST_TENANT)
+
+            self.assert_called_with_def(api_call, expected_def)
+            self.assertTrue(enabled)
+
+    def test_enable_multicast(self):
+        tier1_id = '111'
+        with mock.patch.object(self.policy_api,
+                               "create_or_update") as api_call:
+            self.resourceApi.enable_multicast(
+                tier1_id,
+                tenant=TEST_TENANT)
+
+            expected_def = core_defs.Tier1MulticastDef(
+                tier1_id=tier1_id,
+                service_id=self.resourceApi._locale_service_id(tier1_id),
+                enabled=True,
+                tenant=TEST_TENANT)
+
+            self.assert_called_with_def(api_call, expected_def)
+
+    def test_disable_multicast(self):
+        tier1_id = '111'
+        with mock.patch.object(self.policy_api,
+                               "create_or_update") as api_call:
+            self.resourceApi.disable_multicast(
+                tier1_id,
+                tenant=TEST_TENANT)
+
+            expected_def = core_defs.Tier1MulticastDef(
+                tier1_id=tier1_id,
+                service_id=self.resourceApi._locale_service_id(tier1_id),
+                enabled=False,
+                tenant=TEST_TENANT)
+
+            self.assert_called_with_def(api_call, expected_def)
+
     def test_add_advertisement_rule(self):
         tier1_id = '111'
         rule_name = 'rule_name'
diff --git a/vmware_nsxlib/v3/policy/core_defs.py b/vmware_nsxlib/v3/policy/core_defs.py
index 1f1e68d5..dfaca1a9 100644
--- a/vmware_nsxlib/v3/policy/core_defs.py
+++ b/vmware_nsxlib/v3/policy/core_defs.py
@@ -564,6 +564,24 @@ class Tier1LocaleServiceDef(RouterLocaleServiceDef):
         return (TenantDef, Tier1Def)
 
 
+class Tier1MulticastDef(ResourceDef):
+
+    @property
+    def path_pattern(self):
+        return TIER1_LOCALE_SERVICES_PATH_PATTERN + "%s/multicast"
+
+    @property
+    def path_ids(self):
+        # 'Dummy' used since multicast is a sub-attribute of a Tier1 GW
+        # which is however set with its own API endpoint
+        return ('tenant', 'tier1_id', 'service_id', 'dummy')
+
+    def get_obj_dict(self):
+        body = super(Tier1MulticastDef, self).get_obj_dict()
+        self._set_attr_if_specified(body, 'enabled')
+        return body
+
+
 class Tier0InterfaceDef(ResourceDef):
 
     @staticmethod
diff --git a/vmware_nsxlib/v3/policy/core_resources.py b/vmware_nsxlib/v3/policy/core_resources.py
index 15211c81..254b106f 100644
--- a/vmware_nsxlib/v3/policy/core_resources.py
+++ b/vmware_nsxlib/v3/policy/core_resources.py
@@ -1327,6 +1327,30 @@ class NsxPolicyTier1Api(NsxPolicyResourceBase):
             tenant=tenant)
         return self._list(t1interface_def)
 
+    def get_multicast(self, tier1_id, tenant=constants.POLICY_INFRA_TENANT):
+        mcast_def = core_defs.Tier1MulticastDef(
+            tier1_id=tier1_id,
+            service_id=self._locale_service_id(tier1_id),
+            tenant=tenant)
+        mcast_data = self.policy_api.get(mcast_def)
+        return mcast_data.get('enabled')
+
+    def _set_multicast(self, tier1_id, enabled, tenant):
+        args = {'tier1_id': tier1_id,
+                'service_id': self._locale_service_id(tier1_id),
+                'enabled': enabled,
+                'tenant': tenant}
+        mcast_def = core_defs.Tier1MulticastDef(**args)
+        self.policy_api.create_or_update(mcast_def)
+
+    def enable_multicast(self, tier1_id,
+                         tenant=constants.POLICY_INFRA_TENANT):
+        self._set_multicast(tier1_id, True, tenant)
+
+    def disable_multicast(self, tier1_id,
+                          tenant=constants.POLICY_INFRA_TENANT):
+        self._set_multicast(tier1_id, False, tenant)
+
     def get_realized_state(self, tier1_id, entity_type=None,
                            tenant=constants.POLICY_INFRA_TENANT,
                            realization_info=None):