diff --git a/docs/debugtool.gif b/docs/debugtool.gif
new file mode 100644
index 0000000..0e76ec6
Binary files /dev/null and b/docs/debugtool.gif differ
diff --git a/go.mod b/go.mod
index 1aa2435..d696dab 100644
--- a/go.mod
+++ b/go.mod
@@ -8,7 +8,7 @@ require (
 	github.com/briandowns/spinner v1.15.0
 	github.com/enescakir/emoji v1.0.0
 	github.com/go-logr/logr v0.4.0
-	github.com/iomesh/operator v0.9.8
+	github.com/iomesh/operator v0.9.8 // indirect
 	github.com/spf13/cobra v1.1.1
 	k8s.io/api v0.20.2
 	k8s.io/apimachinery v0.20.2
diff --git a/image/Dockerfile b/image/Dockerfile
new file mode 100644
index 0000000..0934a15
--- /dev/null
+++ b/image/Dockerfile
@@ -0,0 +1,7 @@
+FROM alpine:latest
+
+RUN apk add --no-cache iperf3 bash bind-tools
+
+COPY debugtool_entrypoint.sh /usr/bin/debugtool_entrypoint.sh
+
+ENTRYPOINT ["bash","-x","/usr/bin/debugtool_entrypoint.sh"]
diff --git a/image/debugtool_entrypoint.sh b/image/debugtool_entrypoint.sh
new file mode 100755
index 0000000..b02e160
--- /dev/null
+++ b/image/debugtool_entrypoint.sh
@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+set -xeuo
+
+select_ip_by_cidr() {
+  cidr=$1
+  cidr_network=$(ipcalc -n "$cidr" | cut -f2 -d=)
+  cidr_prefix=$(ipcalc -p "$cidr" | cut -f2 -d=)
+
+  IFS=' ' read -r -a ips <<<"$(echo $(ip addr show | grep inet | grep -v inet6 | awk '{print $2}'))"
+  results=()
+  for ip in ${ips[@]}; do
+    ip_network="$(ipcalc -n $(echo ${ip} | awk -F'/' '{print $1}')/${cidr_prefix} | cut -f2 -d=)"
+
+    if [ "$ip_network" = "$cidr_network" ]; then
+      results+=("$(echo ${ip} | awk -F'/' '{print $1}')")
+    fi
+  done
+  if [ "${#results[@]}" -gt 1 ]; then
+    echo "[ERROR] get more than 1 ip with cidr ${cidr}" >&2
+    return
+  fi
+  echo "${results[0]}"
+}
+
+if [[ -z $HOST_NETWORK_CIDR ]]; then
+	IPERF_BIND_ADDR="0.0.0.0"
+else
+	IPERF_BIND_ADDR=$(select_ip_by_cidr "$HOST_NETWORK_CIDR")
+	if [[ -z "$IPERF_BIND_ADDR" ]]; then
+	   echo "warning IPERF_BIND_ADDR is empty"
+	fi
+fi
+
+echo $IPERF_BIND_ADDR > /opt/iperf_bind_addr
+
+export IPERF_BIND_ADDR
+
+iperf3 -s -B $IPERF_BIND_ADDR
diff --git a/pkg/fixture/fixture.go b/pkg/fixture/fixture.go
index 9a1a1fe..fa41abd 100644
--- a/pkg/fixture/fixture.go
+++ b/pkg/fixture/fixture.go
@@ -116,10 +116,10 @@ func (f Fixture) Cleanup() error {
 }
 
 func (f Fixture) BasicCheckerDaemonSet(namespace, name string) (*appsv1.DaemonSet, error) {
-	dataCIRD := os.Getenv("IOMESH_DATA_CIDR")
+	dataCIRD := os.Getenv("HOST_NETWORK_CIDR")
 	_, _, err := net.ParseCIDR(dataCIRD)
 	if err != nil {
-		return nil, errors.New("IOMESH_DATA_CIDR is not the correct cidr format. example: IOMESH_DATA_CIDR=192.168.1.0/24")
+		return nil, errors.New("HOST_NETWORK_CIDR is not the correct cidr format. example: HOST_NETWORK_CIDR=192.168.1.0/24")
 	}
 	ds := kutils.NewDaemonSet(namespace, name)
 	labels := map[string]string{
@@ -135,7 +135,7 @@ func (f Fixture) BasicCheckerDaemonSet(namespace, name string) (*appsv1.DaemonSe
 		Image: constant.DebugToolsImage,
 		Env: []corev1.EnvVar{
 			{
-				Name:  "DATA_CIDR",
+				Name:  "HOST_NETWORK_CIDR",
 				Value: "",
 			},
 		},
diff --git a/pkg/network/hostnetwork/host_network_checker.go b/pkg/network/hostnetwork/host_network_checker.go
index 30d46fc..a561fc3 100644
--- a/pkg/network/hostnetwork/host_network_checker.go
+++ b/pkg/network/hostnetwork/host_network_checker.go
@@ -124,10 +124,10 @@ func (hc HostNetworkChecker) GetBandwidth() error {
 }
 
 func (hc HostNetworkChecker) HostNetworkCheckerDaemonSet(namespace, name string) (*appsv1.DaemonSet, error) {
-	dataCIRD := os.Getenv("IOMESH_DATA_CIDR")
+	dataCIRD := os.Getenv("HOST_NETWORK_CIDR")
 	_, _, err := net.ParseCIDR(dataCIRD)
 	if err != nil {
-		return nil, errors.New("IOMESH_DATA_CIDR is not the correct cidr format. example: IOMESH_DATA_CIDR=192.168.1.0/24")
+		return nil, errors.New("HOST_NETWORK_CIDR is not the correct cidr format. example: HOST_NETWORK_CIDR=192.168.1.0/24")
 	}
 	ds := kutils.NewDaemonSet(namespace, name)
 	labels := map[string]string{
@@ -144,7 +144,7 @@ func (hc HostNetworkChecker) HostNetworkCheckerDaemonSet(namespace, name string)
 		Image: constant.DebugToolsImage,
 		Env: []corev1.EnvVar{
 			{
-				Name:  "DATA_CIDR",
+				Name:  "HOST_NETWORK_CIDR",
 				Value: dataCIRD,
 			},
 		},