librenms-librenms/includes/snmptrap/linkUp.inc.php

<?php

$interface = dbFetchRow("SELECT * FROM `ports` WHERE `device_id` = ? AND `ifIndex` = ?", array($device['device_id'],$entry[2]));

if (!$interface) {
    exit;
}

$ifOperStatus = "up";
$ifAdminStatus = "up";

log_event("SNMP Trap: linkUp $ifAdminStatus/$ifOperStatus " . $interface['ifDescr'], $device, "interface", $interface['port_id']);

if ($ifAdminStatus != $interface['ifAdminStatus']) {
    log_event("Interface Enabled : " . $interface['ifDescr'] . " (TRAP)", $device, "interface", $interface['port_id']);
    dbUpdate(array('ifAdminStatus' => 'up'), 'ports', 'port_id=?', array($interface['port_id']));
}

if ($ifOperStatus != $interface['ifOperStatus']) {
    log_event("Interface went Up : " . $interface['ifDescr'] . " (TRAP)", $device, "interface", $interface['port_id']);
    dbUpdate(array('ifOperStatus' => 'up'), 'ports', 'port_id=?', array($interface['port_id']));
}