diff --git a/api/loxinlp/ipvs.go b/api/loxinlp/ipvs.go
index 6176f4c73..493c448ea 100644
--- a/api/loxinlp/ipvs.go
+++ b/api/loxinlp/ipvs.go
@@ -48,6 +48,7 @@ type ipVSEntry struct {
 	Key       ipVSKey
 	sel       cmn.EpSelect
 	mode      cmn.LBMode
+	pType     string
 	InValid   bool
 	EndPoints []ipvsEndPoint
 }
@@ -83,6 +84,7 @@ func (ctx *IpVSH) BuildIpVSDB() []*ipVSEntry {
 		}
 
 		newEntry.sel = cmn.LbSelRr
+		newEntry.pType = ""
 		if svc.Flags&0x1 == 0x1 {
 			newEntry.sel = cmn.LbSelRrPersist
 		}
@@ -103,6 +105,7 @@ func (ctx *IpVSH) BuildIpVSDB() []*ipVSEntry {
 		newEntry.mode = cmn.LBModeDefault
 		if svc.Port >= K8sNodePortMin && svc.Port <= K8sNodePortMax {
 			newEntry.mode = cmn.LBModeFullNAT
+			newEntry.pType = "ping"
 		}
 
 		key := ipVSKey{Address: svc.Address.String(), Protocol: proto, Port: svc.Port}
@@ -141,7 +144,7 @@ func IpVSSync() {
 			for _, ent := range ipVSCtx.RMap {
 				if ent.InValid {
 					name := fmt.Sprintf("ipvs_%s:%d-%s", ent.Key.Address, ent.Key.Port, ent.Key.Protocol)
-					lbrule := cmn.LbRuleMod{Serv: cmn.LbServiceArg{ServIP: ent.Key.Address, ServPort: ent.Key.Port, Proto: ent.Key.Protocol, Sel: ent.sel, Mode: ent.mode, Name: name}}
+					lbrule := cmn.LbRuleMod{Serv: cmn.LbServiceArg{ServIP: ent.Key.Address, ServPort: ent.Key.Port, Proto: ent.Key.Protocol, Sel: ent.sel, Mode: ent.mode, Name: name, ProbeType: ent.pType}}
 					_, err := hooks.NetLbRuleDel(&lbrule)
 					if err != nil {
 						tk.LogIt(tk.LogError, "IPVS LB %v delete failed\n", ent.Key)
@@ -153,7 +156,7 @@ func IpVSSync() {
 
 			for _, newEnt := range ipVSList {
 				name := fmt.Sprintf("ipvs_%s:%d-%s", newEnt.Key.Address, newEnt.Key.Port, newEnt.Key.Protocol)
-				lbrule := cmn.LbRuleMod{Serv: cmn.LbServiceArg{ServIP: newEnt.Key.Address, ServPort: newEnt.Key.Port, Proto: newEnt.Key.Protocol, Sel: newEnt.sel, Mode: newEnt.mode, Name: name}}
+				lbrule := cmn.LbRuleMod{Serv: cmn.LbServiceArg{ServIP: newEnt.Key.Address, ServPort: newEnt.Key.Port, Proto: newEnt.Key.Protocol, Sel: newEnt.sel, Mode: newEnt.mode, Name: name, ProbeType: newEnt.pType}}
 				for _, ep := range newEnt.EndPoints {
 					lbrule.Eps = append(lbrule.Eps, cmn.LbEndPointArg{EpIP: ep.EpIP, EpPort: ep.EpPort, Weight: 1})
 				}
diff --git a/loxilb-ebpf b/loxilb-ebpf
index afca7cb69..4f79bbe43 160000
--- a/loxilb-ebpf
+++ b/loxilb-ebpf
@@ -1 +1 @@
-Subproject commit afca7cb6985d9b2a2dd7b76c0e9a773057fb9a2e
+Subproject commit 4f79bbe43f973f7683ec7006bfe6c2881b3618ac
diff --git a/loxinet/route.go b/loxinet/route.go
index f9c69f238..0f7b66eb9 100644
--- a/loxinet/route.go
+++ b/loxinet/route.go
@@ -19,11 +19,10 @@ package loxinet
 import (
 	"errors"
 	"fmt"
-	"net"
-
-	tk "github.com/loxilb-io/loxilib"
-
 	cmn "github.com/loxilb-io/loxilb/common"
+	opts "github.com/loxilb-io/loxilb/options"
+	tk "github.com/loxilb-io/loxilib"
+	"net"
 )
 
 // error codes
@@ -471,6 +470,13 @@ func (rt *Rt) DP(work DpWorkT) int {
 		return -1
 	}
 
+	if opts.Opts.FallBack {
+		if rtNet.IP.IsUnspecified() {
+			fmt.Printf("FALL BACK MODE\n\n\n\n")
+			return 0
+		}
+	}
+
 	if work == DpStatsGet {
 		nStat := new(StatDpWorkQ)
 		nStat.Work = work
diff --git a/options/options.go b/options/options.go
index d20269c59..83594955a 100644
--- a/options/options.go
+++ b/options/options.go
@@ -30,4 +30,5 @@ var Opts struct {
 	Rpc               string         `long:"rpc" description:"RPC mode for syncing - netrpc or grpc" default:"netrpc"`
 	K8sApi            string         `long:"k8s-api" description:"Enable k8s watcher(experimental)" default:"none"`
 	IPVSCompat        bool           `long:"ipvs-compat" description:"Enable ipvs-compat(experimental)"`
+	FallBack          bool           `long:"fallback" description:"Fallback to system default networking(experimental)"`
 }