diff --git a/pkg/ipam/ip.go b/pkg/ipam/ip.go
index 92a03e96cc6..8dd7ac1b8f8 100644
--- a/pkg/ipam/ip.go
+++ b/pkg/ipam/ip.go
@@ -51,6 +51,21 @@ func (iprl IPRangeList) Contains(ip IP) bool {
 	return false
 }
 
+func (iprl IPRangeList) Equal(iprl2 IPRangeList) bool {
+	if len(iprl) != len(iprl2) {
+		return false
+	}
+
+	for i, range1 := range iprl {
+		range2 := iprl2[i]
+		if !range1.Start.Equal(range2.Start) || !range1.End.Equal(range2.End) {
+			return false
+		}
+	}
+
+	return true
+}
+
 func (iprl IPRangeList) IpRangetoString() string {
 	var ipRangeString []string
 	for _, ipr := range iprl {
diff --git a/pkg/ipam/ipam.go b/pkg/ipam/ipam.go
index 18c89c77d43..eaf70e8ef26 100644
--- a/pkg/ipam/ipam.go
+++ b/pkg/ipam/ipam.go
@@ -155,7 +155,8 @@ func (ipam *IPAM) AddOrUpdateSubnet(name, cidrStr, gw string, excludeIps []strin
 
 	if subnet, ok := ipam.Subnets[name]; ok {
 		subnet.Protocol = protocol
-		if protocol == kubeovnv1.ProtocolDual || protocol == kubeovnv1.ProtocolIPv4 {
+		if protocol == kubeovnv1.ProtocolDual || protocol == kubeovnv1.ProtocolIPv4 &&
+			(subnet.V4CIDR.String() != v4cidrStr || subnet.V4Gw != v4Gw || !subnet.V4ReservedIPList.Equal(convertExcludeIps(v4ExcludeIps))) {
 			_, cidr, _ := net.ParseCIDR(v4cidrStr)
 			subnet.V4CIDR = cidr
 			subnet.V4ReservedIPList = convertExcludeIps(v4ExcludeIps)
@@ -164,6 +165,7 @@ func (ipam *IPAM) AddOrUpdateSubnet(name, cidrStr, gw string, excludeIps []strin
 			subnet.V4FreeIPList = IPRangeList{&IPRange{Start: IP(firstIP), End: IP(lastIP)}}
 			subnet.joinFreeWithReserve()
 			subnet.V4ReleasedIPList = IPRangeList{}
+			subnet.V4Gw = v4Gw
 			for nicName, ip := range subnet.V4NicToIP {
 				mac := subnet.NicToMac[nicName]
 				podName := subnet.V4IPToPod[ip]
@@ -172,7 +174,9 @@ func (ipam *IPAM) AddOrUpdateSubnet(name, cidrStr, gw string, excludeIps []strin
 				}
 			}
 		}
-		if protocol == kubeovnv1.ProtocolDual || protocol == kubeovnv1.ProtocolIPv6 {
+		if protocol == kubeovnv1.ProtocolDual || protocol == kubeovnv1.ProtocolIPv6 &&
+			(subnet.V6CIDR.String() != v6cidrStr || subnet.V6Gw != v6Gw || !subnet.V6ReservedIPList.Equal(convertExcludeIps(v6ExcludeIps))) {
+
 			_, cidr, _ := net.ParseCIDR(v6cidrStr)
 			subnet.V6CIDR = cidr
 			subnet.V6ReservedIPList = convertExcludeIps(v6ExcludeIps)
@@ -181,6 +185,7 @@ func (ipam *IPAM) AddOrUpdateSubnet(name, cidrStr, gw string, excludeIps []strin
 			subnet.V6FreeIPList = IPRangeList{&IPRange{Start: IP(firstIP), End: IP(lastIP)}}
 			subnet.joinFreeWithReserve()
 			subnet.V6ReleasedIPList = IPRangeList{}
+			subnet.V6Gw = v6Gw
 			for nicName, ip := range subnet.V6NicToIP {
 				mac := subnet.NicToMac[nicName]
 				podName := subnet.V6IPToPod[ip]