diff --git a/conn/conn.go b/conn/conn.go
index 9ef44ee..5b0b06b 100644
--- a/conn/conn.go
+++ b/conn/conn.go
@@ -150,22 +150,47 @@ func parseEndpoint(s string) (*net.UDPAddr, error) {
 	return addr, err
 }
 
-func LookupIP(host_port string, af int) (net.Addr, string, error) {
-	network := "udp"
-	if af == 4 {
-		network = "udp4"
-	} else if af == 6 {
-		network = "udp6"
-	}
+func LookupIP(host_port string, Af int, AfPrefer int) (string, string, error) {
 	if host_port == "" {
-		return nil, "", fmt.Errorf("error lookup ip from empty string")
+		return "", "", fmt.Errorf("error lookup ip from empty string")
 	}
-	conn, err := net.Dial(network, host_port)
+	var conn net.Conn
+	var err error
+	var af_try_order []string
+
+	var NetStr string
+	switch Af {
+	case 4:
+		af_try_order = []string{"udp4"}
+	case 6:
+		af_try_order = []string{"udp6"}
+	case 0:
+		switch AfPrefer {
+		case 0:
+			af_try_order = []string{"udp"}
+		case 4:
+			af_try_order = []string{"udp4", "udp6", "udp"}
+		case 6:
+			af_try_order = []string{"udp6", "udp4", "udp"}
+		default:
+			return "", "", fmt.Errorf("unknown address family:%v", AfPrefer)
+		}
+	default:
+		return "", "", fmt.Errorf("unknown address family:%v", Af)
+	}
+	for _, af := range af_try_order {
+		conn, err = net.Dial(af, host_port)
+		if err == nil {
+			NetStr = af
+			break
+		}
+	}
+
 	if err != nil {
-		return nil, "", err
+		return "", "", err
 	}
 	defer conn.Close()
-	return conn.RemoteAddr(), conn.RemoteAddr().String(), nil
+	return NetStr, conn.RemoteAddr().String(), nil
 }
 
 func ValidIP(ip net.IP) bool {
diff --git a/device/peer.go b/device/peer.go
index 61d0922..d089da3 100644
--- a/device/peer.go
+++ b/device/peer.go
@@ -21,6 +21,8 @@ import (
 	"gopkg.in/yaml.v2"
 )
 
+const AfPerferVal = 10000
+
 type endpoint_tryitem struct {
 	URL      string
 	lastTry  time.Time
@@ -44,7 +46,7 @@ func NewEndpoint_trylist(peer *Peer, timeout time.Duration) *endpoint_trylist {
 	}
 }
 
-func (et *endpoint_trylist) UpdateSuper(urls mtypes.API_connurl, UseLocalIP bool) {
+func (et *endpoint_trylist) UpdateSuper(urls mtypes.API_connurl, UseLocalIP bool, AfPerfer int) {
 	et.Lock()
 	defer et.Unlock()
 	newmap_super := make(map[string]*endpoint_tryitem)
@@ -57,7 +59,17 @@ func (et *endpoint_trylist) UpdateSuper(urls mtypes.API_connurl, UseLocalIP bool
 		if url == "" {
 			continue
 		}
-		_, _, err := conn.LookupIP(url, 0)
+		addr, _, err := conn.LookupIP(url, 0, AfPerfer)
+		switch AfPerfer {
+		case 4:
+			if addr == "udp4" {
+				it = it - AfPerferVal
+			}
+		case 6:
+			if addr == "udp6" {
+				it = it - AfPerferVal
+			}
+		}
 		if err != nil {
 			if et.peer.device.LogLevel.LogInternal {
 				fmt.Printf("Internal: Peer %v : Update trylist(super) %v error: %v\n", et.peer.ID.ToString(), url, err)
@@ -75,7 +87,7 @@ func (et *endpoint_trylist) UpdateSuper(urls mtypes.API_connurl, UseLocalIP bool
 			}
 			newmap_super[url] = &endpoint_tryitem{
 				URL:      url,
-				lastTry:  time.Time{}.Add(mtypes.S2TD(it)),
+				lastTry:  time.Time{}.Add(mtypes.S2TD(AfPerferVal)).Add(mtypes.S2TD(it)),
 				firstTry: time.Time{},
 			}
 		}
@@ -84,7 +96,7 @@ func (et *endpoint_trylist) UpdateSuper(urls mtypes.API_connurl, UseLocalIP bool
 }
 
 func (et *endpoint_trylist) UpdateP2P(url string) {
-	_, _, err := conn.LookupIP(url, 0)
+	_, _, err := conn.LookupIP(url, 0, 0)
 	if err != nil {
 		return
 	}
@@ -462,12 +474,12 @@ func (peer *Peer) SetPSK(psk NoisePresharedKey) {
 	peer.handshake.mutex.Unlock()
 }
 
-func (peer *Peer) SetEndpointFromConnURL(connurl string, af int, static bool) error {
+func (peer *Peer) SetEndpointFromConnURL(connurl string, af int, af_perfer int, static bool) error {
 	if peer.device.LogLevel.LogInternal {
 		fmt.Println("Internal: Set endpoint to " + connurl + " for NodeID:" + peer.ID.ToString())
 	}
 	var err error
-	_, connurl, err = conn.LookupIP(connurl, af)
+	_, connurl, err = conn.LookupIP(connurl, af, af_perfer)
 	if err != nil {
 		return err
 	}
diff --git a/device/receivesendproc.go b/device/receivesendproc.go
index cf58f45..8754d0f 100644
--- a/device/receivesendproc.go
+++ b/device/receivesendproc.go
@@ -492,7 +492,7 @@ func (device *Device) process_UpdatePeerMsg(peer *Peer, State_hash string) error
 				thepeer.SetPSK(pk)
 			}
 
-			thepeer.endpoint_trylist.UpdateSuper(*peerinfo.Connurl, !device.EdgeConfig.DynamicRoute.SuperNode.SkipLocalIP)
+			thepeer.endpoint_trylist.UpdateSuper(*peerinfo.Connurl, !device.EdgeConfig.DynamicRoute.SuperNode.SkipLocalIP, device.EdgeConfig.AfPrefer)
 			if !thepeer.IsPeerAlive() {
 				//Peer died, try to switch to this new endpoint
 				send_signal = true
@@ -765,7 +765,7 @@ func (device *Device) RoutineTryReceivedEndpoint() {
 				if connurl == "" {
 					continue
 				}
-				err := thepeer.SetEndpointFromConnURL(connurl, thepeer.ConnAF, thepeer.StaticConn) //trying to bind first url in the list and wait ConnNextTry seconds
+				err := thepeer.SetEndpointFromConnURL(connurl, thepeer.ConnAF, device.EdgeConfig.AfPrefer, thepeer.StaticConn) //trying to bind first url in the list and wait ConnNextTry seconds
 				if err != nil {
 					device.log.Errorf("Bind " + connurl + " failed!")
 					thepeer.endpoint_trylist.Delete(connurl)
@@ -947,12 +947,12 @@ func (device *Device) RoutinePostPeerInfo(startchan <-chan struct{}) {
 		}
 		for _, AIP := range device.EdgeConfig.DynamicRoute.SuperNode.AdditionalLocalIP {
 			success := false
-			_, ipstr, err := conn.LookupIP(AIP, 4)
+			_, ipstr, err := conn.LookupIP(AIP, 4, 0)
 			if err == nil {
 				success = true
 				LocalV4s[ipstr] = 50
 			}
-			_, ipstr, err = conn.LookupIP(AIP, 6)
+			_, ipstr, err = conn.LookupIP(AIP, 6, 0)
 			if err == nil {
 				success = true
 				LocalV6s[ipstr] = 50
@@ -1064,7 +1064,7 @@ func (device *Device) RoutineResetEndpoint() {
 			if peer.IsPeerAlive() {
 				continue
 			}
-			err := peer.SetEndpointFromConnURL(peer.ConnURL, peer.ConnAF, peer.StaticConn)
+			err := peer.SetEndpointFromConnURL(peer.ConnURL, peer.ConnAF, device.EdgeConfig.AfPrefer, peer.StaticConn)
 			if err != nil {
 				device.log.Errorf("Failed to bind "+peer.ConnURL, err)
 				continue
diff --git a/example_config/super_mode/EgNet_edge001.yaml b/example_config/super_mode/EgNet_edge001.yaml
index 65488c6..c6b5886 100644
--- a/example_config/super_mode/EgNet_edge001.yaml
+++ b/example_config/super_mode/EgNet_edge001.yaml
@@ -3,7 +3,7 @@ Interface:
   Name: EgNet001
   VPPIFaceID: 1
   VPPBridgeID: 4242
-  MacAddrPrefix: F6:C6:D6:39
+  MacAddrPrefix: FA:A7:11:D6
   IPv4CIDR: 192.168.76.0/24
   IPv6CIDR: fd95:71cb:a3df:e586::/64
   IPv6LLPrefix: fe80::a3df:0/112
@@ -16,8 +16,9 @@ NodeName: EgNet001
 PostScript: ""
 DefaultTTL: 200
 L2FIBTimeout: 3600
-PrivKey: nFleKaROzsjbtWtClWEhSXtU/chEyftua3RYEFtJmrk=
+PrivKey: +KAYwkRgacUbxc52t04z8fTJBgvrkPLsisr0qJOhIUE=
 ListenPort: 0
+AfPrefer: 4
 LogLevel:
   LogLevel: error
   LogTransit: true
@@ -36,11 +37,11 @@ DynamicRoute:
   SaveNewPeers: true
   SuperNode:
     UseSuperNode: true
-    PSKey: aqGxI+K8SAV5U+v1ig4TN9JjI0FGlJgPEbB1juVIbr0=
+    PSKey: yl/4SNFee7+kNekajVCrK0toqXJ4mlT4IN0klyAgyqU=
     EndpointV4: 127.0.0.1:3456
-    PubKeyV4: k90vb67heqcN2GHwY5X9kbn6owjJbbVuVB+P1DD4AEU=
+    PubKeyV4: 1NS6MxL2LUIlMsppJ5JfHnlofQfCxDUzaItBGwz+jBo=
     EndpointV6: ""
-    PubKeyV6: z26JJATeF3jqcjsoY+82WkrSj6xvEBGFEth5v/u3Eiw=
+    PubKeyV6: gSBwlJH4aUPRfSP4ZHKAnXIkPZuVaEhsLBispLYFiwo=
     EndpointEdgeAPIUrl: http://127.0.0.1:3456/eg_net/eg_api
     SkipLocalIP: false
     AdditionalLocalIP: []
diff --git a/example_config/super_mode/EgNet_edge002.yaml b/example_config/super_mode/EgNet_edge002.yaml
index b8b0944..9d4464e 100644
--- a/example_config/super_mode/EgNet_edge002.yaml
+++ b/example_config/super_mode/EgNet_edge002.yaml
@@ -3,7 +3,7 @@ Interface:
   Name: EgNet002
   VPPIFaceID: 1
   VPPBridgeID: 4242
-  MacAddrPrefix: F6:C6:D6:39
+  MacAddrPrefix: FA:A7:11:D6
   IPv4CIDR: 192.168.76.0/24
   IPv6CIDR: fd95:71cb:a3df:e586::/64
   IPv6LLPrefix: fe80::a3df:0/112
@@ -16,8 +16,9 @@ NodeName: EgNet002
 PostScript: ""
 DefaultTTL: 200
 L2FIBTimeout: 3600
-PrivKey: DbtUTgAt0363z1wAAbQrQ+qd6rUf2Gw7AOlPWVBYwjw=
+PrivKey: jDAolOiiRj/ju1xpVagZTtsxJSJba2rjp7J2XMc3yoM=
 ListenPort: 0
+AfPrefer: 4
 LogLevel:
   LogLevel: error
   LogTransit: true
@@ -36,11 +37,11 @@ DynamicRoute:
   SaveNewPeers: true
   SuperNode:
     UseSuperNode: true
-    PSKey: HuhEMcywAlFzvdNCGdBvNFxXMxTHE5nf1qS7njLS9o0=
+    PSKey: FJfjc+wRfk0FSuUkHlXl6D8xPzOKYdy3bxeYr5cpevQ=
     EndpointV4: 127.0.0.1:3456
-    PubKeyV4: k90vb67heqcN2GHwY5X9kbn6owjJbbVuVB+P1DD4AEU=
+    PubKeyV4: 1NS6MxL2LUIlMsppJ5JfHnlofQfCxDUzaItBGwz+jBo=
     EndpointV6: ""
-    PubKeyV6: z26JJATeF3jqcjsoY+82WkrSj6xvEBGFEth5v/u3Eiw=
+    PubKeyV6: gSBwlJH4aUPRfSP4ZHKAnXIkPZuVaEhsLBispLYFiwo=
     EndpointEdgeAPIUrl: http://127.0.0.1:3456/eg_net/eg_api
     SkipLocalIP: false
     AdditionalLocalIP: []
diff --git a/example_config/super_mode/EgNet_edge100.yaml b/example_config/super_mode/EgNet_edge100.yaml
index f6f4b2b..e5dd1e7 100644
--- a/example_config/super_mode/EgNet_edge100.yaml
+++ b/example_config/super_mode/EgNet_edge100.yaml
@@ -3,7 +3,7 @@ Interface:
   Name: EgNet100
   VPPIFaceID: 1
   VPPBridgeID: 4242
-  MacAddrPrefix: F6:C6:D6:39
+  MacAddrPrefix: FA:A7:11:D6
   IPv4CIDR: 192.168.76.0/24
   IPv6CIDR: fd95:71cb:a3df:e586::/64
   IPv6LLPrefix: fe80::a3df:0/112
@@ -16,8 +16,9 @@ NodeName: EgNet100
 PostScript: ""
 DefaultTTL: 200
 L2FIBTimeout: 3600
-PrivKey: szziqqL7hZcd5uw4hpPdhhYtDajuuJYJIKowwCBr3Mo=
+PrivKey: yNf1SkvwV8c59GmesfTNxSut6gFjYKEg9uIsE05XQUI=
 ListenPort: 0
+AfPrefer: 4
 LogLevel:
   LogLevel: error
   LogTransit: true
@@ -36,11 +37,11 @@ DynamicRoute:
   SaveNewPeers: true
   SuperNode:
     UseSuperNode: true
-    PSKey: 201zPcenuIVoQtCQHPjjw7RRjzVHSGTcgBIDeqZV1Ss=
+    PSKey: 5BPLK4IX3oUd4ILQct2Xc690kkKeUd4jlyeFBkO6pHA=
     EndpointV4: 127.0.0.1:3456
-    PubKeyV4: k90vb67heqcN2GHwY5X9kbn6owjJbbVuVB+P1DD4AEU=
+    PubKeyV4: 1NS6MxL2LUIlMsppJ5JfHnlofQfCxDUzaItBGwz+jBo=
     EndpointV6: ""
-    PubKeyV6: z26JJATeF3jqcjsoY+82WkrSj6xvEBGFEth5v/u3Eiw=
+    PubKeyV6: gSBwlJH4aUPRfSP4ZHKAnXIkPZuVaEhsLBispLYFiwo=
     EndpointEdgeAPIUrl: http://127.0.0.1:3456/eg_net/eg_api
     SkipLocalIP: false
     AdditionalLocalIP: []
diff --git a/example_config/super_mode/EgNet_super.yaml b/example_config/super_mode/EgNet_super.yaml
index 12166cd..cf14c24 100644
--- a/example_config/super_mode/EgNet_super.yaml
+++ b/example_config/super_mode/EgNet_super.yaml
@@ -1,7 +1,7 @@
 NodeName: EgNetSP
 PostScript: ""
-PrivKeyV4: qbvcWSMxBpXaaluU8hS4jTqPnDCD29Ndticp4GgrmfI=
-PrivKeyV6: CfzKBRoBkY5qd8OnizhRCYqx1bJSU7Ql9US09bUq1UY=
+PrivKeyV4: W4hrtkH+htbU3/zAbKLdFeflMSUoKLf741DONjnLk18=
+PrivKeyV6: y47AY2xGs4uiUTHfMLhxooMPu/mFOezSFQ1iZ9giW7E=
 ListenPort: 3456
 ListenPort_EdgeAPI: "3456"
 ListenPort_ManageAPI: "3456"
@@ -38,24 +38,24 @@ ResetEndPointInterval: 600
 Peers:
 - NodeID: 1
   Name: EgNet001
-  PubKey: dkjawveX+UGqcCEgThjLcgowWTY1fA89eY+mQicD3AI=
-  PSKey: aqGxI+K8SAV5U+v1ig4TN9JjI0FGlJgPEbB1juVIbr0=
+  PubKey: 6mdRv+McDgxWIq6bVB1ekxnMMWqhktzHc3JIq5bCSHI=
+  PSKey: yl/4SNFee7+kNekajVCrK0toqXJ4mlT4IN0klyAgyqU=
   AdditionalCost: 10
   SkipLocalIP: false
   EndPoint: ""
-  ExternalIP: "google.com"
+  ExternalIP: ""
 - NodeID: 2
   Name: EgNet002
-  PubKey: iKWT8Sk+uQHB6KOSEBF7oILhkl78x1KKlE8scg4k3jc=
-  PSKey: HuhEMcywAlFzvdNCGdBvNFxXMxTHE5nf1qS7njLS9o0=
+  PubKey: Xb6eYSf4fTkFRLGVqf1sAPBXMKlWsRAbajs1mYABT0w=
+  PSKey: FJfjc+wRfk0FSuUkHlXl6D8xPzOKYdy3bxeYr5cpevQ=
   AdditionalCost: 10
   SkipLocalIP: false
   EndPoint: ""
   ExternalIP: ""
 - NodeID: 100
   Name: EgNet100
-  PubKey: 7HTSE5ofjFbicCmFay8Xn5THlI9yrBLhT0gXL4t+Rws=
-  PSKey: 201zPcenuIVoQtCQHPjjw7RRjzVHSGTcgBIDeqZV1Ss=
+  PubKey: cZb8NNE1FBLy6kIUGXjdXCprUHuqzfpyXTwUxHJobnM=
+  PSKey: 5BPLK4IX3oUd4ILQct2Xc690kkKeUd4jlyeFBkO6pHA=
   AdditionalCost: 10
   SkipLocalIP: false
   EndPoint: ""
diff --git a/example_config/super_mode/gensuper.yaml b/example_config/super_mode/gensuper.yaml
index c0d2da9..bb3c5f8 100644
--- a/example_config/super_mode/gensuper.yaml
+++ b/example_config/super_mode/gensuper.yaml
@@ -1,6 +1,6 @@
 Config output dir: /tmp/eg_gen_super
-ConfigTemplate for super node:  "EgNet_super.yaml"
-ConfigTemplate for edge node:  "EgNet_edge001.yaml"
+ConfigTemplate for super node: "" # "EgNet_super.yaml"
+ConfigTemplate for edge node: "" # "EgNet_edge001.yaml"
 Network name: EgNet
 Super Node:
   Listen port: 3456
diff --git a/gencfg/example_conf.go b/gencfg/example_conf.go
index d952666..64018d0 100644
--- a/gencfg/example_conf.go
+++ b/gencfg/example_conf.go
@@ -44,6 +44,7 @@ func GetExampleEdgeConf(templatePath string, getDemo bool) (mtypes.EdgeConfig, e
 		L2FIBTimeout: 3600,
 		PrivKey:      "6GyDagZKhbm5WNqMiRHhkf43RlbMJ34IieTlIuvfJ1M=",
 		ListenPort:   0,
+		AfPrefer:     4,
 		LogLevel: mtypes.LoggerInfo{
 			LogLevel:    "error",
 			LogTransit:  false,
diff --git a/gencfg/gencfgNM.go b/gencfg/gencfgNM.go
index a5812c0..22a6dcb 100644
--- a/gencfg/gencfgNM.go
+++ b/gencfg/gencfgNM.go
@@ -114,7 +114,7 @@ func GenNMCfg(NMCinfigPath string, enableP2P bool, printExample bool) (err error
 			return fmt.Errorf("duplicate definition: NodeID %v ", NodeID)
 		}
 		if endpoint != "" {
-			_, _, err = conn.LookupIP(endpoint, 0)
+			_, _, err = conn.LookupIP(endpoint, 0, 0)
 			if err != nil {
 				return err
 			}
diff --git a/gencfg/gencfgSM.go b/gencfg/gencfgSM.go
index aebbd71..1254796 100644
--- a/gencfg/gencfgSM.go
+++ b/gencfg/gencfgSM.go
@@ -176,7 +176,7 @@ func GenSuperCfg(SMCinfigPath string, printExample bool) (err error) {
 	API_Prefix := SMCfg.Supernode.EdgeAPI_Prefix
 	EndpointV4 := SMCfg.Supernode.EndpointV4
 	if EndpointV4 != "" {
-		_, _, err = conn.LookupIP(EndpointV4+":"+ListenPort, 4)
+		_, _, err = conn.LookupIP(EndpointV4+":"+ListenPort, 4, 0)
 		if err != nil {
 			return err
 		}
@@ -188,7 +188,7 @@ func GenSuperCfg(SMCinfigPath string, printExample bool) (err error) {
 		if strings.Contains(EndpointV6, ":") && (EndpointV6[0] != '[' || EndpointV6[len(EndpointV6)-1] != ']') {
 			return fmt.Errorf("Invalid IPv6 format, please use [%v] instead", EndpointV6)
 		}
-		_, _, err = conn.LookupIP(EndpointV6+":"+ListenPort, 6)
+		_, _, err = conn.LookupIP(EndpointV6+":"+ListenPort, 6, 0)
 		if err != nil {
 			return
 		}
diff --git a/main_edge.go b/main_edge.go
index f71bb48..d3ab62b 100644
--- a/main_edge.go
+++ b/main_edge.go
@@ -142,7 +142,7 @@ func Edge(configPath string, useUAPI bool, printExample bool, bindmode string) (
 		the_device.NewPeer(pk, peerconf.NodeID, false, peerconf.PersistentKeepalive)
 		if peerconf.EndPoint != "" {
 			peer := the_device.LookupPeer(pk)
-			err = peer.SetEndpointFromConnURL(peerconf.EndPoint, 0, peerconf.Static)
+			err = peer.SetEndpointFromConnURL(peerconf.EndPoint, 0, econfig.AfPrefer, peerconf.Static)
 			if err != nil {
 				logger.Errorf("Failed to set endpoint %v: %w", peerconf.EndPoint, err)
 				return err
@@ -169,7 +169,7 @@ func Edge(configPath string, useUAPI bool, printExample bool, bindmode string) (
 				return err
 			}
 			peer.SetPSK(psk)
-			err = peer.SetEndpointFromConnURL(econfig.DynamicRoute.SuperNode.EndpointV4, 4, true)
+			err = peer.SetEndpointFromConnURL(econfig.DynamicRoute.SuperNode.EndpointV4, 4, 0, true)
 			if err != nil {
 				logger.Errorf("Failed to set endpoint for supernode v4 %v: %v", econfig.DynamicRoute.SuperNode.EndpointV4, err)
 				S4 = false
@@ -190,7 +190,7 @@ func Edge(configPath string, useUAPI bool, printExample bool, bindmode string) (
 				return err
 			}
 			peer.SetPSK(psk)
-			err = peer.SetEndpointFromConnURL(econfig.DynamicRoute.SuperNode.EndpointV6, 6, true)
+			err = peer.SetEndpointFromConnURL(econfig.DynamicRoute.SuperNode.EndpointV6, 6, 0, true)
 			if err != nil {
 				logger.Errorf("Failed to set endpoint for supernode v6 %v: %v", econfig.DynamicRoute.SuperNode.EndpointV6, err)
 				S6 = false
diff --git a/main_httpserver.go b/main_httpserver.go
index 4511a1c..8a3b8c0 100644
--- a/main_httpserver.go
+++ b/main_httpserver.go
@@ -162,7 +162,7 @@ func get_api_peers(old_State_hash string) (api_peerinfo mtypes.API_Peers, StateH
 			if strings.Contains(connV4, ":") {
 				hostport := strings.Split(connV4, ":")
 				ExternalIP = ExternalIP + ":" + hostport[len(hostport)-1]
-				_, ExternalEndPoint_v4, err := conn.LookupIP(ExternalIP, 4)
+				_, ExternalEndPoint_v4, err := conn.LookupIP(ExternalIP, 4, 0)
 				if err == nil {
 					connV4 = ExternalEndPoint_v4
 				}
@@ -170,7 +170,7 @@ func get_api_peers(old_State_hash string) (api_peerinfo mtypes.API_Peers, StateH
 			if strings.Contains(connV6, ":") {
 				hostport := strings.Split(connV6, ":")
 				ExternalIP = ExternalIP + ":" + hostport[len(hostport)-1]
-				_, ExternalEndPoint_v6, err := conn.LookupIP(ExternalIP, 6)
+				_, ExternalEndPoint_v6, err := conn.LookupIP(ExternalIP, 6, 0)
 				if err == nil {
 					connV6 = ExternalEndPoint_v6
 				}
diff --git a/main_super.go b/main_super.go
index 9212573..86f69ff 100644
--- a/main_super.go
+++ b/main_super.go
@@ -267,7 +267,7 @@ func super_peeradd(peerconf mtypes.SuperPeerInfo) error {
 			peer4.SetPSK(psk)
 		}
 		if peerconf.EndPoint != "" {
-			err = peer4.SetEndpointFromConnURL(peerconf.EndPoint, 4, true)
+			err = peer4.SetEndpointFromConnURL(peerconf.EndPoint, 4, 0, true)
 			if err != nil {
 				if httpobj.http_sconfig.LogLevel.LogInternal {
 					fmt.Printf("Internal: Set endpoint failed:%v\n", err)
@@ -292,7 +292,7 @@ func super_peeradd(peerconf mtypes.SuperPeerInfo) error {
 			peer6.SetPSK(psk)
 		}
 		if peerconf.EndPoint != "" {
-			err = peer6.SetEndpointFromConnURL(peerconf.EndPoint, 6, true)
+			err = peer6.SetEndpointFromConnURL(peerconf.EndPoint, 6, 0, true)
 			if err != nil {
 				if httpobj.http_sconfig.LogLevel.LogInternal {
 					fmt.Printf("Internal: Set endpoint failed:%v\n", err)
diff --git a/mtypes/config.go b/mtypes/config.go
index f4752ec..7294d1b 100644
--- a/mtypes/config.go
+++ b/mtypes/config.go
@@ -26,6 +26,7 @@ type EdgeConfig struct {
 	L2FIBTimeout          float64          `yaml:"L2FIBTimeout"`
 	PrivKey               string           `yaml:"PrivKey"`
 	ListenPort            int              `yaml:"ListenPort"`
+	AfPrefer              int              `yaml:"AfPrefer"`
 	LogLevel              LoggerInfo       `yaml:"LogLevel"`
 	DynamicRoute          DynamicRouteInfo `yaml:"DynamicRoute"`
 	NextHopTable          NextHopTable     `yaml:"NextHopTable"`