Tags: mac,ethernet,bash

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1. Finding ethernet address (MAC) of an IP address with arping
   1 year ago by spirit and saved by 1 other
   It needs gawk, sed and grep.
   1. arping -c 1 192.168.1.1 | grep ":" | sed "s/\[//g;s/\]//g" |gawk '{print $5}'
   2. # 00:AA:BB:CC:DD:EE
   3.  
   4. # Find MACs of all the hosts on a specific network with broadcast pings. Displays:
   5. # 192.168.1.1 -> 00:AA:BB:CC:DD:EE
   6. # 192.168.1.2 -> 00:FC:AE:5C:D1:A6
   7. # ...
   8. for i in `ping -b -c 5 192.168.1.255 | grep ": ic" | gawk '{print $4}' | sort -u | sed "s/://g"`
   9. do
   10.    arping -c 1 $i | grep ":" | sed "s/\[//g;s/\]//g" | gawk '{a=$4" -> "$5;print a}'
   11. done
   arpingbashethernetgawkgrepmacsedshell
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