Ping in Network Discovery

echo “Pinging IP range”
if [ $# -eq 0 ]; then
   start_message
fi
IPRANGE=$(echo $1 | grep -v ‘[A-Za-z]’ | grep -oE ‘(\b[0-9]{1,3}\.){3}[0-9]{1,3}-[0-9]{1,3}’)
if [ “$IPRANGE” == “” ]; then
   echo “Wrong argument: $1”
   start_message
fi
echo “Ping this IP range: $IPRANGE”
IPBASE=$(echo $IPRANGE | grep -oE ‘(\b[0-9]{1,3}\.){2}[0-9]{1,3}’)
# echo $IPBASE
IPSTART=$(echo $IPRANGE | grep -oE ‘\b[0-9]{1,3}-‘ | grep -oE ‘\b[0-9]{1,3}’)
#echo $IPSTART
IPEND=$(echo $IPRANGE | grep -oE ‘\b-[0-9]{1,3}’ | grep -oE ‘\b[0-9]{1,3}’)
# echo $IPEND
for param in `seq $IPSTART $IPEND`; do
   IPADDR=$IPBASE.$param
   RESULT=$(ping $IPADDR -c 1 -i 1 | grep icmp_seq=1 | grep -i -v Unreachable | grep -v ‘100% packet loss’)
   if [ “$RESULT” != “” ]; then
      echo “$IPADDR ($RESULT)”
      fi
done