diff --git a/pkg/controller/webhook/validate.go b/pkg/controller/webhook/validate.go
index 596c2661f..619da6669 100644
--- a/pkg/controller/webhook/validate.go
+++ b/pkg/controller/webhook/validate.go
@@ -17,7 +17,6 @@ import (
 	"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
 
 	"github.com/spidernet-io/egressgateway/pkg/config"
-	"github.com/spidernet-io/egressgateway/pkg/constant"
 	"github.com/spidernet-io/egressgateway/pkg/egressgateway"
 	egressv1 "github.com/spidernet-io/egressgateway/pkg/k8s/apis/v1beta1"
 	"github.com/spidernet-io/egressgateway/pkg/utils/ip"
@@ -336,42 +335,6 @@ func checkEIPIncluded(client client.Client, ctx context.Context, ipv4, ipv6, egw
 	return true, nil
 }
 
-func countGatewayAvailableIP(egw *egressv1.EgressGateway) (int, int, error) {
-	// check has free egress ip
-	ipv4Ranges, err := ip.MergeIPRanges(constant.IPv4, egw.Spec.Ippools.IPv4)
-	if err != nil {
-		return 0, 0, err
-	}
-	ipv6Ranges, err := ip.MergeIPRanges(constant.IPv6, egw.Spec.Ippools.IPv6)
-	if err != nil {
-		return 0, 0, err
-	}
-	useIpv4s := make([]net.IP, 0)
-	useIpv6s := make([]net.IP, 0)
-	for _, node := range egw.Status.NodeList {
-		for _, eip := range node.Eips {
-			if len(eip.IPv4) != 0 {
-				useIpv4s = append(useIpv4s, net.ParseIP(eip.IPv4))
-			}
-			if len(eip.IPv6) != 0 {
-				useIpv6s = append(useIpv6s, net.ParseIP(eip.IPv6))
-			}
-		}
-	}
-	ipv4s, err := ip.ParseIPRanges(constant.IPv4, ipv4Ranges)
-	if err != nil {
-		return 0, 0, err
-	}
-	ipv6s, err := ip.ParseIPRanges(constant.IPv6, ipv6Ranges)
-	if err != nil {
-		return 0, 0, err
-	}
-	freeIpv4s := ip.IPsDiffSet(ipv4s, useIpv4s, false)
-	freeIpv6s := ip.IPsDiffSet(ipv6s, useIpv6s, false)
-
-	return len(freeIpv4s), len(freeIpv6s), nil
-}
-
 func validateSubnet(subnet []string) webhook.AdmissionResponse {
 	invalidList := make([]string, 0)
 	for _, subnet := range subnet {
diff --git a/pkg/controller/webhook/validate_test.go b/pkg/controller/webhook/validate_test.go
index abc75e547..6d812f7dc 100644
--- a/pkg/controller/webhook/validate_test.go
+++ b/pkg/controller/webhook/validate_test.go
@@ -18,7 +18,6 @@ import (
 
 	"github.com/spidernet-io/egressgateway/pkg/config"
 	"github.com/spidernet-io/egressgateway/pkg/k8s/apis/v1beta1"
-	egressv1 "github.com/spidernet-io/egressgateway/pkg/k8s/apis/v1beta1"
 	"github.com/spidernet-io/egressgateway/pkg/schema"
 )
 
@@ -983,76 +982,3 @@ func TestUpdateEgressClusterPolicy(t *testing.T) {
 		})
 	}
 }
-
-func TestCountAvailableIP(t *testing.T) {
-	tests := []struct {
-		name  string
-		args  *egressv1.EgressGateway
-		want4 int
-		want6 int
-	}{
-		{
-			name: "case1-ipv4",
-			args: &egressv1.EgressGateway{
-				Spec: egressv1.EgressGatewaySpec{
-					Ippools: egressv1.Ippools{
-						IPv4: []string{
-							"10.6.1.21-10.6.1.30",
-						},
-						IPv6: []string{},
-					},
-				},
-				Status: v1beta1.EgressGatewayStatus{
-					NodeList: []egressv1.EgressIPStatus{
-						{
-							Name: "node1",
-							Eips: []egressv1.Eips{{IPv4: "10.6.1.21"}},
-						},
-					},
-				},
-			},
-			want4: 9,
-			want6: 0,
-		},
-		{
-			name: "case2-dual",
-			args: &egressv1.EgressGateway{
-				Spec: egressv1.EgressGatewaySpec{
-					Ippools: egressv1.Ippools{
-						IPv4: []string{
-							"10.6.1.21",
-							"10.6.1.22",
-						},
-						IPv6: []string{
-							"fd00::1-fd00::2",
-						},
-					},
-				},
-				Status: v1beta1.EgressGatewayStatus{
-					NodeList: []egressv1.EgressIPStatus{
-						{
-							Name: "node1",
-							Eips: []egressv1.Eips{{IPv4: "10.6.1.21", IPv6: "fd00::1"}},
-						},
-					},
-				},
-			},
-			want4: 1,
-			want6: 1,
-		},
-	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			got4, got6, err := countGatewayAvailableIP(tt.args)
-			if err != nil {
-				t.Fatal(err)
-			}
-			if got4 != tt.want4 {
-				t.Fatalf("got4 %d, want4 %d", got4, tt.want4)
-			}
-			if got6 != tt.want6 {
-				t.Fatalf("got6 %d, want6 %d", got6, tt.want6)
-			}
-		})
-	}
-}
diff --git a/pkg/egressgateway/egress_gateway.go b/pkg/egressgateway/egress_gateway.go
index 4e1aef2a8..a48327c7f 100644
--- a/pkg/egressgateway/egress_gateway.go
+++ b/pkg/egressgateway/egress_gateway.go
@@ -585,6 +585,12 @@ func (r *egnReconciler) reconcileGateway(ctx context.Context, req reconcile.Requ
 		}
 	}
 
+	// first create egw update usage
+	if (egw.Status.IPUsage.IPv4Total == 0 && len(egw.Spec.Ippools.IPv4) != 0) ||
+		(egw.Status.IPUsage.IPv6Total == 0 || len(egw.Spec.Ippools.IPv6) != 0) {
+		needUpdate = true
+	}
+
 	if needUpdate {
 		// update
 		err := updateGatewayStatusWithUsage(ctx, r.client, egw)
diff --git a/pkg/utils/ip/ip.go b/pkg/utils/ip/ip.go
index d2f6f9f12..06e9cc644 100644
--- a/pkg/utils/ip/ip.go
+++ b/pkg/utils/ip/ip.go
@@ -256,7 +256,7 @@ func IPsDiffSet(ips1, ips2 []net.IP, sorted bool) []net.IP {
 // to [172.18.40.1-172.18.40.5]. The overlapping part of two IP ranges will
 // be ignored.
 func MergeIPRanges(version constant.IPVersion, ipRanges []string) ([]string, error) {
-	ips, err := ParseIPRanges(version, ipRanges)
+	ips, err := ConvertCidrOrIPrangeToIPs(ipRanges, version)
 	if err != nil {
 		return nil, err
 	}