@@ -4,7 +4,10 @@ package ipvlan

 import (

 	"context"

+	"os"

+	"os/exec"

 	"strings"

+	"sync"

 	"testing"

 	"time"

@@ -21,7 +24,7 @@ func TestDockerNetworkIpvlanPersistance(t *testing.T) {

 	// verify the driver automatically provisions the 802.1q link (di-dummy0.70)

 	skip.If(t, testEnv.DaemonInfo.OSType == "windows")

 	skip.If(t, testEnv.IsRemoteDaemon)

-	skip.If(t, !ipvlanKernelSupport(), "Kernel doesn't support ipvlan")

+	skip.If(t, !ipvlanKernelSupport(t), "Kernel doesn't support ipvlan")

 	d := daemon.New(t, daemon.WithExperimental)

 	d.StartWithBusybox(t)

@@ -49,7 +52,7 @@ func TestDockerNetworkIpvlanPersistance(t *testing.T) {

 func TestDockerNetworkIpvlan(t *testing.T) {

 	skip.If(t, testEnv.DaemonInfo.OSType == "windows")

 	skip.If(t, testEnv.IsRemoteDaemon)

-	skip.If(t, !ipvlanKernelSupport(), "Kernel doesn't support ipvlan")

+	skip.If(t, !ipvlanKernelSupport(t), "Kernel doesn't support ipvlan")

 	for _, tc := range []struct {

 		name string

@@ -425,7 +428,23 @@ func testIpvlanAddressing(client dclient.APIClient) func(*testing.T) {

 	}

 }

-// ensure Kernel version is >= v4.2 for ipvlan support

-func ipvlanKernelSupport() bool {

-	return n.CheckKernelMajorVersionGreaterOrEqualThen(4, 2)

+var (

+	once            sync.Once

+	ipvlanSupported bool

+)

+

+// figure out if ipvlan is supported by the kernel

+func ipvlanKernelSupport(t *testing.T) bool {

+	once.Do(func() {

+		// this may have the side effect of enabling the ipvlan module

+		exec.Command("modprobe", "ipvlan").Run()

+		_, err := os.Stat("/sys/module/ipvlan")

+		if err == nil {

+			ipvlanSupported = true

+		} else if !os.IsNotExist(err) {

+			t.Logf("WARNING: ipvlanKernelSupport: stat failed: %v\n", err)

+		}

+	})

+

+	return ipvlanSupported

 }