A quick script to go through your DHCP server log and get a summary of MAC addresses and associated DHCP requests. The script will attempt to download the IEEE OUI list for identifying the manufacturers associated with the MAC addresses in your log. This is a fairly large text file, so the download may take a few minutes. Once downloaded, the script will not try to download the file again, unless it’s about three months old.

You may need to modify the f="/var/log/boot.log" to point to your DHCP server log file. Depending on the number of log entries, the script may take a while to run. Feel free to optimize it if you can. The output should look something like this:

You can download the script here: dhcp_log_stats.


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