snmprealwalk

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railson at amixsi dot com dot br
31-May-2006 01:52


Attention: timeout is in microseconds (multiply by 1,000,000 for seconds)

Stephen Cope
10-Sep-2004 11:38


Here's a way to find the uptime and number of users on a machine. (Note that uptime is the uptime of the snmpd daemon, which should be fairly close to the uptime for the host.)



<?php

        $state = snmprealwalk($host, "public", ".1.3.6.1.2.1.25.1", 50, 1);

        $uptime = ereg_replace("^.*\) ([0-9]+ .*):[0-9][0-9]\.[0-9]{2}.*$", "\\1", $state['host.hrSystem.hrSystemUptime.0']);

        $users  = (int)ereg_replace("Gauge32: ", "", $state['host.hrSystem.hrSystemNumUsers.0']);

        printf('<div class="machine"><dt>%s</dt><dd>%s</dd>', $host, $desc);

        printf('<dd>up %s</dd>', $uptime);

        if ( $users ) printf('<dd>%d user%s</dd>', $users, ($users > 1) ? 's' : '');

        printf('</div>');

?>

Lars Troen
24-Feb-2003 09:30


snmprealwalk indexes the values using the oid instead of an integer. This is useful when you need data that is contained in the oid as well as the value. 



Here's an example for retrieving and printing vlan info:

//

// I have collected the vlan identifiers earlier from the 3com mib and they are stored in the $vlan table.

// 

  for($n=0;$n<count($vlan);$n++){

    print $vlan[$n][id]."  ".$vlan[$n][name]."<br>\n";

    $ifStackStatusTable=@snmprealwalk($switch, $community, ".1.3.6.1.2.1.31.1.2.1.3.".$vlan[$n][id]); // ifMIB.ifMIBObjects.ifStackTable.ifStackEntry.ifStackStatus

    for(reset($ifStackStatusTable);  $port = key($ifStackStatusTable);  next($ifStackStatusTable)){

      print "$port=$ifStackStatusTable[$port]<br>";

      }

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snmprealwalk

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