Grep in Script

[mrn]

Platform = Solaris 8

I'm trying to create a IP/Mac discovery script

a=1
rm /tmp/ping.look
while [ "$a" -le 254 ]
do
ping 192.168.24.$a 1 >> /tmp/ping.look
arp -a| /usr/xpg4/bin/egrep -x 192.168.24.$a >> /tmp/ping.look
a=`expr $a + 1`
echo $a
done

All works fine apart from the Mac address bit where I'm getting the following problem

no answer from 192.168.24.1
eri0 192.168.24.15 255.255.255.255 00:01:02:8d:9e:f3
eri0 192.168.24.1 255.255.255.255 U
no answer from 192.168.24.2
eri0 192.168.24.253 255.255.255.255 00:00:0c:07:ac:18
eri0 192.168.24.232 255.255.255.255 00:01:e6:14:6a:c0
eri0 192.168.24.29 255.255.255.255 00:50:8b:60:54:b4
eri0 192.168.24.2 255.255.255.255 U
no answer from 192.168.24.3
eri0 192.168.24.33 255.255.255.255 00:50:8b:dc:d9:bf
eri0 192.168.24.37 255.255.255.255 00:80:5f:d7:a3:e4
eri0 192.168.24.3 255.255.255.255 U
no answer from 192.168.24.4
eri0 192.168.24.45 255.255.255.255 00:06:29:55:8a:04
eri0 192.168.24.46 255.255.255.255 00:0c:ce:77:29:ff
eri0 192.168.24.4 255.255.255.255 U
no answer from 192.168.24.5
eri0 192.168.24.5 255.255.255.255 U
no answer from 192.168.24.6
eri0 192.168.24.65 255.255.255.255 00:50:8b:69:8e:65
eri0 192.168.24.6 255.255.255.255 U

How do I only list the Mac address that belongs to the IP?

-
| Mike Nixon
| Unix Admin
-------------

 

[PHV]

Replace this:
arp -a| /usr/xpg4/bin/egrep -x 192.168.24.$a >> /tmp/ping.look
By this:
arp -a|grep "192.168.24.$a " >> /tmp/ping.look

Hope This Helps, PH.
Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884 or FAQ222-2244

 

[mrn]

I need to match the pattern exactly so using

arp -a|grep "192.168.24.$a " >> /tmp/ping.look

would provide the same result as I'm getting now.

-
| Mike Nixon
| Unix Admin
-------------

 

[PHV]

Even with the space between $a and " ?
arp -a|grep "192.168.24.$a{highlight] [/highlight]" >> /tmp/ping.look
If yes, you can try this:
arp -a|grep "192.168.24.$a[ ]" >> /tmp/ping.look

Hope This Helps, PH.
Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884 or FAQ222-2244

 

[mrn]

Cheers that works only I have to add the following

arp -a| grep "192.168.24.$a[ ]"|grep -v U >> /tmp/ping.look

as each line that isn't pingable produces

no answer from 192.168.24.5
eri0 192.168.24.5 255.255.255.255 U



-
| Mike Nixon
| Unix Admin
-------------