Cool function you can use on your local network to lookup a devices MAC address, (assuming the device is on your network).
For a big company, either look in the remote locations router, or your core router. Â If you use this leave me a comment, would love to know how your using it.
// =============================================// getmac(Device IP, Router, SNMP Read Community)// Â Michael Requeny — http://michael.requeny.com// – Looks up remote devices MAC// – SNMP to routers ARP table// – Converts MAC from HEX to ASCII// – Inserts : seperators// =============================================function getmac($ip, $router, $snmpread) {$oid = “.1.3.6.1.2.1.3.1.1.2”;$mac = snmprealwalk($router, $snmpread, $oid, 1000000 ,10);// load up array keys for lookups$keys = array_keys($mac);foreach ($keys as $key) {// if needle contains IP && needle = IP// this prevents srch for 10.254.254.1 returning// multiple values (like .1, .11, .111, etc.if (strstr($key,$ip) == $ip) {$mackey = $key;}}$mac = trim(str_replace(‘Hex-STRING: ‘, ”, $mac));$mac = str_replace(‘ ‘, ‘:’, $mac);return $mac;}
