最近公司震动内网网络，需要收集一下那些IP没有用，网上搜了这个一个脚本，给大家分享一下：
#!/bin/bash
IPaddr=10.20.221.
IPFILE=/root/arping.txt
UPIPaddr=/tmp/ipup.txt
DOWNIPaddr=/tmp/ipdown.txt
>$IPFILE
touch $DOWNIPaddr
touch $UPIPaddr
touch $IPFILE
for IP in {1..254}
do
arping -c 1 $IPaddr$IP >>$IPFILE
done
echo UPIPADDR
echo " 

IPADDR            MAC ";  cat $IPFILE  | grep reply |awk '{print $4"    "$5}' |awk -F"[" '{print $1" "$2}' | awk -F"]" '{print $1"  "$2}' | column -t >$UPIPaddr
echo DOWNIPADDR
IPTMP=/tmp/ip.txt
IPTMP2=/tmp/ip2.txt
grep -v ^'[S|R]' $IPFILE |awk -FARPING '{print $2}'|awk -Ffrom '{print $1}' |column -t >$IPTMP
grep -v ^'[S|R]' $IPFILE |awk -F"Unicast reply from" '{print $2}'|awk '{print $1}'| uniq -c |awk '{print $2}' |uniq -c |awk '{print $2}'|column -t >$IPTMP2
cat $IPTMP $IPTMP2 | sort -t "." -k4,4n |uniq -u  >$DOWNIPaddr
VL=` wc -l $UPIPaddr |awk '{print $1}'`
VL2=`wc -l $DOWNIPaddr |awk '{print $1}'`
cat $UPIPaddr
echo 目前有$VL台主机为活动状态
cat $DOWNIPaddr | paste -s
echo 目前有$VL2个可用IP地址


[root@localhost ~]# sh test.sh
UPIPADDR
  IPADDR            MAC
DOWNIPADDR
10.20.221.6    00:05:1E:E6:64:91
10.20.221.7    00:05:1E:ED:2D:C6
10.20.221.9    00:25:9E:D2:B0:24
10.20.221.10   00:25:9E:D2:B0:90
10.20.221.11   00:10:5C:FA:F0:5A
10.20.221.12   00:50:56:88:55:53
10.20.221.13   00:50:56:88:5A:4A
10.20.221.14   00:10:5C:FA:F0:6C
10.20.221.238  00:50:56:7E:BA:29
10.20.221.239  00:50:56:75:97:B4
10.20.221.244  3C:E5:A6:B1:7F:5D
10.20.221.252  98:4B:E1:6F:F2:B4
目前有138台主机为活动状态
10.20.221.1     10.20.221.2     10.20.221.3     10.20.221.4     10.20.221.5     10.20.221.8     10.20.221.22       10.20.221.25    10.20.221.32    10.20.221.33    10.20.221.34    10.20.221.40    10.20.221.48       10.20.221.49    10.20.221.50    10.20.221.51    10.20.221.52    10.20.221.53    10.20.221.54       10.20.221.55    10.20.221.56    10.20.221.57    10.20.221.58    10.20.221.59    10.20.221.60       10.20.221.61    10.20.221.62    10.20.221.63    10.20.221.64    10.20.221.65    10.20.221.66       10.20.221.67    10.20.221.68    10.20.221.69    10.20.221.70    10.20.221.71    10.20.221.72       10.20.221.73    10.20.221.74    10.20.221.75    10.20.221.76    10.20.221.77    10.20.221.78       10.20.221.79    10.20.221.80    10.20.221.83    10.20.221.84    10.20.221.100   10.20.221.108      10.20.221.109   10.20.221.110   10.20.221.113   10.20.221.114   10.20.221.120   10.20.221.122      10.20.221.123   10.20.221.125   10.20.221.138   10.20.221.139   10.20.221.142   10.20.221.143      10.20.221.144   10.20.221.145   10.20.221.146   10.20.221.147   10.20.221.148   10.20.221.149      10.20.221.151   10.20.221.153   10.20.221.154   10.20.221.155   10.20.221.156  
目前有118个可用IP地址
[root@localhost ~]#