librenms-librenms/includes/polling/mempools/avaya-ers.inc.php

<?php

if ($device['os'] == 'avaya-ers') {
    // Memory information only known to work with 5500 and 5600 switches
    if (preg_match('/5[56][0-9][0-9]/', $device['sysDescr'])) {
        $index = $mempool['mempool_index'];

        $total = (snmp_get($device, ".1.3.6.1.4.1.45.1.6.3.8.1.1.12$index", '-Oqv') * 1048576);
        $avail = (snmp_get($device, ".1.3.6.1.4.1.45.1.6.3.8.1.1.13$index", '-Oqv') * 1048576);

        $mempool['total'] = $total;
        $mempool['free']  = $avail;
        $mempool['used']  = ($total - $avail);
    }
}