diff --git a/cmd/care.go b/cmd/care.go
index d20272b..f93d194 100644
--- a/cmd/care.go
+++ b/cmd/care.go
@@ -38,7 +38,7 @@ func init() {
 	// and all subcommands, e.g.:
 	// careCmd.PersistentFlags().String("foo", "", "A help for foo")
 	careCmd.Flags().BoolVar(&care.LVS.RunOnce, "run-once", false, "is run once mode")
-	careCmd.Flags().StringVar(&care.LVS.VirtualServer, "vs", "", "virturl server like 10.54.0.2:6443")
+	careCmd.Flags().StringVar(&care.LVS.VirtualServer, "vs", "", "virtual server like 10.54.0.2:6443")
 	careCmd.Flags().StringSliceVar(&care.LVS.RealServer, "rs", []string{}, "real server like 192.168.0.2:6443")
 	careCmd.Flags().StringVar(&care.LVS.Logger, "logger", "INFO", "logger level: DEBG/INFO")
 	careCmd.Flags().BoolVar(&care.LVS.Clean, "clean", false, "before run clean ipvs rules")
diff --git a/service/service.go b/service/service.go
index e3c74b9..b40751a 100644
--- a/service/service.go
+++ b/service/service.go
@@ -19,8 +19,7 @@ type EndPoint struct {
 }
 
 func (ep EndPoint) String() string {
-	port := strconv.Itoa(int(ep.Port))
-	return ep.IP + ":" + port
+	return net.JoinHostPort(ep.IP, strconv.Itoa(int(ep.Port)))
 }
 
 //Lvser is
diff --git a/utils/utils.go b/utils/utils.go
index cb37317..360aa1f 100644
--- a/utils/utils.go
+++ b/utils/utils.go
@@ -8,23 +8,24 @@ import (
 	"net"
 	"net/http"
 	"strconv"
-	"strings"
 )
 
 //SplitServer is
 func SplitServer(server string) (string, uint16) {
-	s := strings.Split(server, ":")
-	if len(s) != 2 {
-		glog.Warning("SplitServer error: len(s) is not two.")
+	glog.V(8).Infof("server %s", server)
+
+	ip, port, err := net.SplitHostPort(server)
+	if err != nil {
+		glog.Errorf("SplitServer error: %v.", err)
 		return "", 0
 	}
-	glog.V(8).Infof("SplitServer debug: IP: %s, Port: %s", s[0], s[1])
-	p, err := strconv.Atoi(s[1])
+	glog.V(8).Infof("SplitServer debug: IP: %s, Port: %s", ip, port)
+	p, err := strconv.Atoi(port)
 	if err != nil {
 		glog.Warningf("SplitServer error: %v", err)
 		return "", 0
 	}
-	return s[0], uint16(p)
+	return ip, uint16(p)
 }
 
 //IsHTTPAPIHealth is check http error
@@ -33,7 +34,7 @@ func IsHTTPAPIHealth(ip, port, path, schem string) bool {
 	url := fmt.Sprintf("%s://%s:%s%s", schem, ip, port, path)
 	resp, err := http.Get(url)
 	if err != nil {
-		glog.V(8).Infof("IsHTTPAPIHealth error: ", err)
+		glog.V(8).Infof("IsHTTPAPIHealth error: %v", err)
 		return false
 	}
 	defer resp.Body.Close()
diff --git a/utils/utils_test.go b/utils/utils_test.go
new file mode 100644
index 0000000..1ce0055
--- /dev/null
+++ b/utils/utils_test.go
@@ -0,0 +1,49 @@
+// alibaba-inc.com Inc.
+// Copyright (c) 2004-2022 All Rights Reserved.
+//
+// @Author : huaiyou.cyz
+// @Time : 2022/5/25 4:08 PM
+// @File : utils_test.go
+//
+
+package utils
+
+import "testing"
+
+func TestSplitServer(t *testing.T) {
+	type args struct {
+		server string
+	}
+	tests := []struct {
+		name  string
+		args  args
+		want  string
+		want1 uint16
+	}{
+		{
+			args: args{
+				server: "[1408:4003:10bb:6a01:83b9:6360:c66d:ed3e]:6443",
+			},
+			want:  "1408:4003:10bb:6a01:83b9:6360:c66d:ed3e",
+			want1: 6443,
+		},
+		{
+			args: args{
+				server: "1.1.1.1:6443",
+			},
+			want:  "1.1.1.1",
+			want1: 6443,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, got1 := SplitServer(tt.args.server)
+			if got != tt.want {
+				t.Errorf("SplitServer() got = %v, want %v", got, tt.want)
+			}
+			if got1 != tt.want1 {
+				t.Errorf("SplitServer() got1 = %v, want %v", got1, tt.want1)
+			}
+		})
+	}
+}