#!/bin/sh

for int in `ip -o link | cut -f 2 -d" " | cut -f 1 -d:`; do

 echo "====================="
 echo Interface $int
 mac=`ip link show ${int} | grep link/ether | tr -s " " | cut -f 3 -d" "`
 if ( test $int = "lo" ) then
  mac="--loopback--"
 fi
 echo HW $mac
 macprefix=`echo ${mac} | tr ":" "." | cut -f 1-3 -d.`
 cat /var/lib/ieee-data/oui.txt | grep -i " ${macprefix}"

done