One-liner: How to scan a network for up & down hosts and show OUI info

This is another version of the ping sweep one-liner script. To show the OUI (Ethernet interface manufacturer) it needs to be run locally (to scan the locally connected networks).

Ubuntu version:

for i in {1..10}
 do 
  ( ip="10.0.1.$i"
  up=`ping -n -q -W1 -c2 $ip | fgrep transmitted | sed -e 's/.*100%.*/down/' -e 's/.*0%.*/up/'`
  mac=`arp -an $ip | awk '{print $4}'`
  oui=`fgrep $(echo $mac | tr -d ":" | head -c6 | tr '[a-z]' '[A-Z]') /usr/share/ieee-data/oui.txt | sed -e 's/^.*)..//'`
  name=`host $ip | awk '/pointer/{print $NF}'`
  echo $ip $up $name $mac $oui ) 2>/dev/null &  
done | sed -e 's/<incomplete>//'  -e 's/entries//'  | sort -n -t. -k4

Result:

10.0.1.1 down 
10.0.1.2 down 
10.0.1.3 up host1. 00:08:9b:c0:ff:ee ICP Electronics Inc.
10.0.1.4 down 
10.0.1.5 down host2. 
10.0.1.6 up nas3. 52:54:00:c0:ff:ee
10.0.1.7 down laptop. 
10.0.1.8 down 
10.0.1.9 up switch2. 88:51:fb:c0:ff:ee Hewlett Packard
10.0.1.10 down printer. 

RedHat/CheckPoint firewall version:

for i in {1..10}
 do 
  (ip="10.0.1.$i"
  up=`ping -n -q -W1 -c2 $ip | fgrep transmitted | sed -e 's/.*100%.*/down/' -e 's/.*0%.*/up/'`
  mac=`arp -an $ip | awk '{print $4}'`
  oui=`fgrep $(echo $mac | tr -d ":" | head -c6 | tr '[a-z]' '[A-Z]')  /usr/share/hwdata/oui.txt | sed -e 's/^.*)..//'`
  name=`host $ip | awk '/pointer/{print $NF}'`
  echo $ip $up $name $mac $oui ) 2>/dev/null &  
done | sed -e 's/<incomplete>//' -e 's/entries//'  | sort -n -t. -k4

The OUI database /usr/share/ieee-data/oui.txt  (for Ubuntu) or /usr/share/hwdata/oui.txt  (for RedHat/CheckPoint) should be kept up-to-date.

Semi-colon separated version for Ubuntu:

for i in {1..10}
 do 
  (ip="10.0.1.$i"
  up=`ping -n -q -W1 -c2 $ip | fgrep transmitted | sed -e 's/.*100%.*/down/' -e 's/.*0%.*/up/'`
  mac=`arp -an $ip | awk '{print $4}'`
  oui=`fgrep $(echo $mac | tr -d ":" | head -c6 | tr '[a-z]' '[A-Z]') /usr/share/ieee-data/oui.txt | sed -e 's/^.*)..//'`
  name=`host $ip | awk '/pointer/{print $NF}'`
  echo "$ip;$up;$name;$mac;$oui"  ) 2>/dev/null &  
done | sed -e 's/<incomplete>//'  -e 's/entries//'  | sort -n -t. -k4

Result:

10.0.1.1;down;;;
10.0.1.2;down;;;
10.0.1.3;up;host1.;00:08:9b:c0:ff:ee;ICP Electronics Inc.
10.0.1.4;down;;;
10.0.1.5;down;host2.;;
10.0.1.6;up;nas3.;52:54:00:c0:ff:ee;
10.0.1.7;down;laptop.;;
10.0.1.8;down;;;
10.0.1.9;up;switch2.;88:51:fb:c0:ff:ee;Hewlett Packard
10.0.1.10;down;printer.;;