diff --git a/lib/neutron-legacy b/lib/neutron-legacy
index 9330b23..be5b73f 100644
--- a/lib/neutron-legacy
+++ b/lib/neutron-legacy
@@ -633,7 +633,7 @@
             IP_UP="sudo ip link set $to_intf up"
             if [[ "$af" == "inet" ]]; then
                 IP=$(echo $IP_BRD | awk '{ print $1; exit }' | grep -o -E '(.*)/' | cut -d "/" -f1)
-                ARP_CMD="arping -A -c 3 -w 4.5 -I $to_intf $IP "
+                ARP_CMD="sudo arping -A -c 3 -w 4.5 -I $to_intf $IP "
             fi
         fi