#checks that NAT is working by pinging an external address from a compute node
function check_nat(){
#echo ">>> Checking NAT on Compute Nodes Works >>>>>>>>>>>>>>>>>>>>>>>>>"
#8.8.8.8 is google
#PING_EXTERNAL="ping -c 2 8.8.8.8"
#Instead we ping license server hpclic0 which is in HPC_Ancillary_zone
PING_EXTERNAL="ping -c 2 118.138.246.208"
$PING_EXTERNAL
RESULT=$?
if[$RESULT-ne 0 ];then
die 1 " $FUNCNAME ERROR on node. Can not ping external address. Command is ' ${PING_EXTERNAL} ' Please check NAT is working, or route on node is valid"