@@ -104,7 +104,7 @@ func fuzzInternalObject(t *testing.T, forVersion unversioned.GroupVersion, item

 			kubeConfig := obj.KubernetesMasterConfig

 			noCloudProvider := kubeConfig != nil && (len(kubeConfig.ControllerArguments["cloud-provider"]) == 0 || kubeConfig.ControllerArguments["cloud-provider"][0] == "")

 			if noCloudProvider && len(obj.NetworkConfig.IngressIPNetworkCIDR) == 0 {

-				cidr := "172.46.0.0/16"

+				cidr := configapi.DefaultIngressIPNetworkCIDR

 				if !(configapi.CIDRsOverlap(cidr, obj.NetworkConfig.ClusterNetworkCIDR) || configapi.CIDRsOverlap(cidr, obj.NetworkConfig.ServiceNetworkCIDR)) {

 					obj.NetworkConfig.IngressIPNetworkCIDR = cidr

 				}

@@ -16,6 +16,10 @@ const (

 	AllVersions = "*"

 )

+const (

+	DefaultIngressIPNetworkCIDR = "172.29.0.0/16"

+)

+

 var (

 	KnownKubernetesAPILevels   = []string{"v1beta1", "v1beta2", "v1beta3", "v1"}

 	KnownOpenShiftAPILevels    = []string{"v1beta1", "v1beta3", "v1"}

@@ -86,7 +86,7 @@ func addDefaultingFuncs(scheme *runtime.Scheme) error {

 			noCloudProvider := kubeConfig != nil && (len(kubeConfig.ControllerArguments["cloud-provider"]) == 0 || kubeConfig.ControllerArguments["cloud-provider"][0] == "")

 			if noCloudProvider && len(obj.NetworkConfig.IngressIPNetworkCIDR) == 0 {

-				cidr := "172.46.0.0/16"

+				cidr := internal.DefaultIngressIPNetworkCIDR

 				if !(internal.CIDRsOverlap(cidr, obj.NetworkConfig.ClusterNetworkCIDR) || internal.CIDRsOverlap(cidr, obj.NetworkConfig.ServiceNetworkCIDR)) {

 					obj.NetworkConfig.IngressIPNetworkCIDR = cidr

 				}

@@ -672,7 +672,7 @@ func ValidateIngressIPNetworkCIDR(config *api.MasterConfig, fldPath *field.Path)

 	_, ipNet, err := net.ParseCIDR(cidr)

 	if err != nil {

-		addError("must be a valid CIDR notation IP range (e.g. 172.46.0.0/16)")

+		addError(fmt.Sprintf("must be a valid CIDR notation IP range (e.g. %s)", api.DefaultIngressIPNetworkCIDR))

 		return

 	}