diff --git a/cmd/verysimple/main.go b/cmd/verysimple/main.go
index 80021bd..1d47e1e 100644
--- a/cmd/verysimple/main.go
+++ b/cmd/verysimple/main.go
@@ -241,7 +241,7 @@ func mainFunc() (result int) {
 		return -1
 	}
 
-	netLayer.Prepare()
+	//netLayer.PrepareInterfaces()	//发现有时, ipv6不是程序刚运行时就有的, 所以不应默认 预读网卡。主要是 openwrt等设备 在使用 DHCPv6 获取ipv6 等情况时。
 
 	fmt.Printf("Log Level:%d\n", utils.LogLevel)
 
diff --git a/netLayer/dial.go b/netLayer/dial.go
index 0b62cc8..78886ed 100644
--- a/netLayer/dial.go
+++ b/netLayer/dial.go
@@ -24,7 +24,7 @@ func (a *Addr) Dial() (net.Conn, error) {
 	case "udp", "udp4", "udp6":
 		ua := a.ToUDPAddr()
 
-		if !machineCanConnectToIpv6 && a.IP.To4() == nil {
+		if weKnowThatWeDontHaveIPV6 && a.IP.To4() == nil {
 			return nil, ErrMachineCantConnectToIpv6
 		}
 
@@ -41,7 +41,7 @@ tcp:
 
 	if a.IP != nil {
 		if a.IP.To4() == nil {
-			if !machineCanConnectToIpv6 {
+			if weKnowThatWeDontHaveIPV6 {
 				return nil, ErrMachineCantConnectToIpv6
 			} else {
 
diff --git a/netLayer/netlayer.go b/netLayer/netlayer.go
index e9ff8bc..0ebd0e2 100644
--- a/netLayer/netlayer.go
+++ b/netLayer/netlayer.go
@@ -29,16 +29,16 @@ import (
 
 var (
 	// 如果机器没有ipv6地址, 就无法联通ipv6, 此时可以在dial时更快拒绝ipv6地址,
-	// 避免打印过多错误输出
-	machineCanConnectToIpv6 bool
+	// 避免打印过多错误输出.
+	weKnowThatWeDontHaveIPV6 bool
 
 	ErrMachineCantConnectToIpv6 = errors.New("ErrMachineCanConnectToIpv6")
 	ErrTimeout                  = errors.New("timeout")
 )
 
 //做一些网络层的资料准备工作, 可以优化本包其它函数的调用。
-func Prepare() {
-	machineCanConnectToIpv6 = HasIpv6Interface()
+func PrepareInterfaces() {
+	weKnowThatWeDontHaveIPV6 = !HasIpv6Interface()
 }
 
 //c.SetDeadline(time.Time{})