diff --git a/recipes-user-module/um-service-cfg/files/um-service-config.sh b/recipes-user-module/um-service-cfg/files/um-service-config.sh
index 9889c29..f38f148 100644
--- a/recipes-user-module/um-service-cfg/files/um-service-config.sh
+++ b/recipes-user-module/um-service-cfg/files/um-service-config.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env bash
 
 UM_CONFIG_PATH=/etc/user-module
 UM_CONFIG_FILE=network.conf
@@ -37,16 +37,22 @@ done
 
 source $UM_CONFIG
 
-max_retry=30
+max_retry=15
 counter=0
 
 until [[ counter -ge $max_retry ]]
 do
   echo "Probing um. #$counter"
   ping -qc 1 -W 1 $USER_MODULE_ipv4_addr && break
+  sleep 1
   ((counter++))
 done
 
+if ! ping -qc 1 -W 1 $USER_MODULE_ipv4_addr
+then
+    echo "UM not reachable"
+    exit 1
+fi
 
 # Decide which config to load depending on the sw revision
 if `nc -z $USER_MODULE_ipv4_addr 7000` ; then