diff --git a/doc/images/kuryr_k8s_components.svg b/doc/images/kuryr_k8s_components.svg
index 4df2928f6..32d517897 100644
--- a/doc/images/kuryr_k8s_components.svg
+++ b/doc/images/kuryr_k8s_components.svg
@@ -256,7 +256,7 @@
          x="754.02399"
          y="640.83807"
          id="tspan10312-2-0"
-         style="font-weight:normal;font-size:30px;line-height:93.99999976%">CNI 0.3.0</tspan></text>
+         style="font-weight:normal;font-size:30px;line-height:93.99999976%">CNI 0.3.1</tspan></text>
     <g
        id="g10768">
       <path
diff --git a/doc/source/installation/manual.rst b/doc/source/installation/manual.rst
index 233843fd3..c0d093f42 100644
--- a/doc/source/installation/manual.rst
+++ b/doc/source/installation/manual.rst
@@ -142,7 +142,7 @@ Kubelet would only use the lexicographically first file in that directory, so
 make sure that it is kuryr's config file::
 
     {
-        "cniVersion": "0.3.0",
+        "cniVersion": "0.3.1",
         "name": "kuryr",
         "type": "kuryr-cni",
         "kuryr_conf": "/etc/kuryr/kuryr.conf",
diff --git a/etc/cni/net.d/10-kuryr.conf b/etc/cni/net.d/10-kuryr.conf
index 5806a78fd..95723d0ed 100644
--- a/etc/cni/net.d/10-kuryr.conf
+++ b/etc/cni/net.d/10-kuryr.conf
@@ -1,5 +1,5 @@
 {
-  "cniVersion": "0.3.0",
+  "cniVersion": "0.3.1",
   "name": "kuryr",
   "type": "kuryr-cni",
   "kuryr_conf": "/etc/kuryr/kuryr.conf",
diff --git a/kuryr_kubernetes/cni/api.py b/kuryr_kubernetes/cni/api.py
index 83af00803..e1600fc4f 100644
--- a/kuryr_kubernetes/cni/api.py
+++ b/kuryr_kubernetes/cni/api.py
@@ -38,8 +38,8 @@ LOG = logging.getLogger(__name__)
 class CNIRunner(object):
     # TODO(ivc): extend SUPPORTED_VERSIONS and format output based on
     # requested params.CNI_VERSION and/or params.config.cniVersion
-    VERSION = '0.3.0'
-    SUPPORTED_VERSIONS = ['0.3.0']
+    VERSION = '0.3.1'
+    SUPPORTED_VERSIONS = ['0.3.1']
 
     @abc.abstractmethod
     def _add(self, params):
@@ -69,6 +69,10 @@ class CNIRunner(object):
     def prepare_env(self, env, stdin):
         raise NotImplementedError()
 
+    @abc.abstractmethod
+    def get_container_id(self):
+        raise NotImplementedError()
+
     def run(self, env, fin, fout):
         try:
             # Prepare params according to calling Object
@@ -89,24 +93,36 @@ class CNIRunner(object):
             self._write_exception(fout, str(ex))
             return 1
 
-    def _vif_data(self, vif):
+    def _vif_data(self, vif, params):
         result = {}
         nameservers = []
 
+        cni_ip_list = result.setdefault("ips", [])
+        cni_routes_list = result.setdefault("routes", [])
+        result["interfaces"] = [
+            {
+                "name": vif.vif_name,
+                "mac": vif.address,
+                "sandbox": self.get_container_id(params)}]
         for subnet in vif.network.subnets.objects:
+            cni_ip = {}
             nameservers.extend(subnet.dns)
 
             ip = subnet.ips.objects[0].address
-            cni_ip = result.setdefault("ip%s" % ip.version, {})
-            cni_ip['ip'] = "%s/%s" % (ip, subnet.cidr.prefixlen)
+
+            cni_ip['version'] = str(ip.version)
+            cni_ip['address'] = "%s/%s" % (ip, subnet.cidr.prefixlen)
+            cni_ip['interface'] = len(result["interfaces"]) - 1
 
             if hasattr(subnet, 'gateway'):
                 cni_ip['gateway'] = str(subnet.gateway)
 
             if subnet.routes.objects:
-                cni_ip['routes'] = [
+                routes = [
                     {'dst': str(route.cidr), 'gw': str(route.gateway)}
                     for route in subnet.routes.objects]
+                cni_routes_list.extend(routes)
+            cni_ip_list.append(cni_ip)
 
         if nameservers:
             result['dns'] = {'nameservers': nameservers}
@@ -120,7 +136,7 @@ class CNIStandaloneRunner(CNIRunner):
 
     def _add(self, params):
         vif = self._plugin.add(params)
-        return self._vif_data(vif)
+        return self._vif_data(vif, params)
 
     def _delete(self, params):
         self._plugin.delete(params)
@@ -128,13 +144,16 @@ class CNIStandaloneRunner(CNIRunner):
     def prepare_env(self, env, stdin):
         return utils.CNIParameters(env, stdin)
 
+    def get_container_id(self, params):
+        return params.CNI_CONTAINERID
+
 
 class CNIDaemonizedRunner(CNIRunner):
 
     def _add(self, params):
         resp = self._make_request('addNetwork', params, httplib.ACCEPTED)
         vif = base.VersionedObject.obj_from_primitive(resp.json())
-        return self._vif_data(vif)
+        return self._vif_data(vif, params)
 
     def _delete(self, params):
         self._make_request('delNetwork', params, httplib.NO_CONTENT)
@@ -146,6 +165,9 @@ class CNIDaemonizedRunner(CNIRunner):
         cni_envs['config_kuryr'] = dict(stdin)
         return cni_envs
 
+    def get_container_id(self, params):
+        return params["CNI_CONTAINERID"]
+
     def _make_request(self, path, cni_envs, expected_status=None):
         method = 'POST'
 
diff --git a/kuryr_kubernetes/tests/unit/cni/test_api.py b/kuryr_kubernetes/tests/unit/cni/test_api.py
index 1ac92e2a1..ba451a261 100644
--- a/kuryr_kubernetes/tests/unit/cni/test_api.py
+++ b/kuryr_kubernetes/tests/unit/cni/test_api.py
@@ -62,8 +62,10 @@ class TestCNIStandaloneRunner(test_base.TestCase, TestCNIRunnerMixin):
         m_k8s_add.return_value = vif
         m_fin = StringIO()
         m_fout = StringIO()
+        container_id = 'a4181c680a39'
         env = {
             'CNI_COMMAND': 'ADD',
+            'CNI_CONTAINERID': container_id,
             'CNI_ARGS': 'foo=bar',
         }
         self.runner.run(env, m_fin, m_fout)
@@ -71,9 +73,22 @@ class TestCNIStandaloneRunner(test_base.TestCase, TestCNIRunnerMixin):
         self.assertEqual('foo=bar', m_k8s_add.call_args[0][0].CNI_ARGS)
         result = jsonutils.loads(m_fout.getvalue())
         self.assertDictEqual(
-            {"cniVersion": "0.3.0",
+            {"cniVersion": '0.3.1',
              "dns": {"nameservers": ["192.168.0.1"]},
-             "ip4": {"gateway": "192.168.0.1", "ip": "192.168.0.2/24"}},
+             "ips": [
+                 {
+                     "version": "4",
+                     "gateway": "192.168.0.1",
+                     "address": "192.168.0.2/24",
+                     "interface": 0,
+                 }],
+             "interfaces": [
+                 {
+                     "name": vif.vif_name,
+                     "mac": vif.address,
+                     "sandbox": container_id,
+                 }],
+             "routes": []},
             result)
 
     @mock.patch('kuryr_kubernetes.cni.plugins.k8s_cni.K8sCNIPlugin.delete')
@@ -84,6 +99,7 @@ class TestCNIStandaloneRunner(test_base.TestCase, TestCNIRunnerMixin):
         m_fout = StringIO()
         env = {
             'CNI_COMMAND': 'DEL',
+            'CNI_CONTAINERID': 'a4181c680a39',
             'CNI_ARGS': 'foo=bar',
         }
         self.runner.run(env, m_fin, m_fout)
@@ -103,6 +119,7 @@ class TestCNIDaemonizedRunner(test_base.TestCase, TestCNIRunnerMixin):
         m_fout = StringIO()
         env = {
             'CNI_COMMAND': cni_cmd,
+            'CNI_CONTAINERID': 'a4181c680a39',
             'CNI_ARGS': 'foo=bar',
         }
         result = self.runner.run(env, m_fin, m_fout)