diff --git a/setup/setup_env.go b/setup/setup_env.go
new file mode 100644
index 0000000..a4210f5
--- /dev/null
+++ b/setup/setup_env.go
@@ -0,0 +1,110 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package setup
+
+import (
+	"log"
+	"os/exec"
+)
+
+const (
+	UNI_VETH_UP_PFX = "sim_uu"
+	UNI_VETH_DW_PFX = "sim_ud"
+	NNI_VETH_UP_PFX = "sim_nu"
+	NNI_VETH_DW_PFX = "sim_nd"
+)
+
+func ActivateWPASups(vethnames []string) error {
+	for _, vethname := range vethnames {
+		if err := activateWPASupplicant(vethname); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func KillAllWPASups() error {
+	err := exec.Command("pkill", "wpa_supplicant").Run()
+	if err != nil {
+		log.Printf("[ERROR] Fail to pkill wpa_supplicant: %v\n", err)
+		return err
+	}
+	return nil
+}
+
+func KillAllDHCPClients() error {
+	err := exec.Command("pkill", "dhclient").Run()
+	if err != nil {
+		log.Printf("[ERROR] Fail to pkill dhclient: %v\n", err)
+		return err
+	}
+	return nil
+}
+
+func TearVethDown(veths []string) {
+	for _, veth := range veths {
+		RemoveVeth(veth)
+	}
+}
+
+func CreateVethPairs(name1 string, name2 string) (err error) {
+	err = exec.Command("ip", "link", "add", name1, "type", "veth", "peer", "name", name2).Run()
+	if err != nil {
+		log.Printf("[ERROR] Fail to createVeth() for %s and %s veth creation error: %s\n", name1, name2, err.Error())
+		return
+	}
+	log.Printf("%s & %s was created.", name1, name2)
+	err = exec.Command("ip", "link", "set", name1, "up").Run()
+	if err != nil {
+		log.Println("[ERROR] Fail to createVeth() veth1 up", err)
+		return
+	}
+	err = exec.Command("ip", "link", "set", name2, "up").Run()
+	if err != nil {
+		log.Println("[ERROR] Fail to createVeth() veth2 up", err)
+		return
+	}
+	log.Printf("%s & %s was up.", name1, name2)
+	return
+}
+
+func RemoveVeth(name string) {
+	err := exec.Command("ip", "link", "del", name).Run()
+	if err != nil {
+		log.Println("[ERROR] Fail to removeVeth()", err)
+	}
+	log.Printf("%s was removed.", name)
+}
+
+func RemoveVeths(names []string) {
+	log.Printf("RemoveVeths() :%s\n", names)
+	for _, name := range names {
+		RemoveVeth(name)
+	}
+}
+
+func activateWPASupplicant(vethname string) (err error) {
+	cmd := "/sbin/wpa_supplicant"
+	conf := "/etc/wpa_supplicant/wpa_supplicant.conf"
+	err = exec.Command(cmd, "-D", "wired", "-i", vethname, "-c", conf).Start()
+	if err != nil {
+		log.Printf("[ERROR] Fail to activateWPASupplicant() for :%s %v\n", vethname, err)
+		return
+	}
+	log.Printf("activateWPASupplicant() for :%s\n", vethname)
+	return
+}
\ No newline at end of file