diff --git a/util/netutils/ipv6.go b/util/netutils/ipv6.go
index 72c34c3..4c20786 100644
--- a/util/netutils/ipv6.go
+++ b/util/netutils/ipv6.go
@@ -363,6 +363,15 @@ func (addr IPV6Addr) Ge(addr2 IPV6Addr) bool {
 	return !addr.Lt(addr2)
 }
 
+func (addr IPV6Addr) IsZero() bool {
+	for _, v := range addr {
+		if v != 0 {
+			return false
+		}
+	}
+	return true
+}
+
 type IPV6AddrRange struct {
 	start IPV6Addr
 	end   IPV6Addr
diff --git a/util/netutils/netutils.go b/util/netutils/netutils.go
index ce2cbd1..929520a 100644
--- a/util/netutils/netutils.go
+++ b/util/netutils/netutils.go
@@ -139,6 +139,10 @@ func (addr IPV4Addr) ToMac(prefix string) string {
 	return fmt.Sprintf("%s%02x:%02x:%02x:%02x", prefix, bytes[0], bytes[1], bytes[2], bytes[3])
 }
 
+func (addr IPV4Addr) IsZero() bool {
+	return addr == 0
+}
+
 type IPV4AddrRange struct {
 	start IPV4Addr
 	end   IPV4Addr