diff --git a/acos_client/tests/unit/v30/test_slb_virtual_server.py b/acos_client/tests/unit/v30/test_slb_virtual_server.py
index 552cc22d..f5b7b04c 100644
--- a/acos_client/tests/unit/v30/test_slb_virtual_server.py
+++ b/acos_client/tests/unit/v30/test_slb_virtual_server.py
@@ -63,6 +63,28 @@ def test_virtual_server_create_no_params(self):
         self.assertEqual(responses.calls[1].request.url, CREATE_URL)
         self.assertEqual(json.loads(responses.calls[1].request.body), params)
 
+    @responses.activate
+    def test_ipv6_virtual_server_create_no_params(self):
+        responses.add(responses.POST, AUTH_URL, json={'session_id': 'foobar'})
+        json_response = {"foo": "bar"}
+        responses.add(responses.POST, CREATE_URL, json=json_response, status=200)
+        params = {
+            'virtual-server': {
+                'ipv6-address': '2001:db8:feed::5001',
+                'name': VSERVER_NAME,
+                'arp-disable': 0,
+                'description': None,
+            }
+        }
+
+        resp = self.client.slb.virtual_server.create('test', '2001:db8:feed::5001')
+
+        self.assertEqual(resp, json_response)
+        self.assertEqual(len(responses.calls), 2)
+        self.assertEqual(responses.calls[1].request.method, responses.POST)
+        self.assertEqual(responses.calls[1].request.url, CREATE_URL)
+        self.assertEqual(json.loads(responses.calls[1].request.body), params)
+
     @responses.activate
     def test_virtual_server_create_with_params(self):
         responses.add(responses.POST, AUTH_URL, json={'session_id': 'foobar'})
diff --git a/acos_client/v30/base.py b/acos_client/v30/base.py
index 719f839f..ecd5dacc 100644
--- a/acos_client/v30/base.py
+++ b/acos_client/v30/base.py
@@ -81,5 +81,8 @@ def _delete(self, action, params={}, max_retries=None, timeout=None, axapi_args=
                              axapi_args=axapi_args, **kwargs)
 
     def _is_ipv6(self, ip_address):
-        validated_ip_address = ipaddress.ip_address(six.text_type(ip_address))
-        return isinstance(validated_ip_address, ipaddress.IPv6Address)
+        ip_version = ipaddress.ip_address(ip_address).version
+        if ip_version == 4:
+            return False
+        if ip_version == 6:
+            return True
diff --git a/acos_client/v30/slb/virtual_server.py b/acos_client/v30/slb/virtual_server.py
index 534a843a..5dd957b0 100644
--- a/acos_client/v30/slb/virtual_server.py
+++ b/acos_client/v30/slb/virtual_server.py
@@ -37,7 +37,6 @@ def _set(self, name, ip_address=None, arp_disable=False, description=None, vrid=
         params = {
             "virtual-server": self.minimal_dict({
                 "name": name,
-                "ip-address": ip_address,
                 "arp-disable": None if arp_disable is None else int(arp_disable),
                 "description": description,
                 "port-list": port_list