#!/bin/sh
NET=$1
START=$2
STOP=$3

LIST=/var/run/client-list.txt

: > $LIST
for ip in $(seq $START $STOP); 
do 
 ping -c2 -w2 $NET.$ip > /dev/null; [ $? -eq 0 ] && echo "$NET.$ip UP" >> $LIST || echo "$NET.$ip DOWN" >> $LIST; 
done