Send pings only if the VM has been found, and do it in background (because python slowlyness)

creationRoutesVM.sh

@@ -241,14 +241,14 @@ for ID_RANGE_V6 in ${ID_RANGES_V6}; do
 		fi
 
 		GW_IPv6="fe80::204:92:100:1"
+
+		# Send ICMP to update ARP/NDP cache
+		send-icmp.py ${MAC} ${IFACE} ${VM_IPV4} ${GW_IPv4} ${VM_NH} ${GW_IPv6} &
 	else
 		# En cas d'echec, on continue de parcourir les autres RANGES
 		echo "Valeur vide ou ne correspond pas à un range IPV6"
 	fi
 done
 
-# Send ICMP to update ARP/NDP cache
-send-icmp.py ${MAC} ${IFACE} ${VM_IPV4} ${GW_IPv4} ${VM_NH} ${GW_IPv6}
-
 write_log INFO 'Script ended'
 exit 0