Web студия "GrandView"

Список параметров

hostname

The SNMP agent.

community

The read community.

object_id

If NULL, object_id is taken as the root of the SNMP objects tree and all objects under that tree are returned as an array.

If object_id is specified, all the SNMP objects below that object_id are returned.

timeout

retries

add a note User Contributed Notes
snmpwalk

http://mike.eire.ca
23-Mar-2005 10:54


I found on Windows (PHP 5) an empty string did not return anything, it just timed out.  I had to use null instead:



<?php

$a = snmpwalk("127.0.0.1", "public", null);

?>

bobby [dot] clark [at] eku [dot] edu
17-Sep-2003 02:29


I had to use an object_id like these.

'SNMPv2-MIB::system.sysDescr.0'

'IF-MIB::interfaces.ifTable.ifEntry.ifAdminStatus'



<?php

$host = '192.168.1.1';

$community = 'public';

$object_id = 'IF-MIB::interfaces.ifTables.ifEntry.ifAdminStatus';



$sysdesc = snmpwalk($host, $community', $object_id);

print_r($sysdesc);

?>

Lars Troen
14-Mar-2003 03:18


Note that there's different behaviuor in php snmpwalk and ucd snmpwalk. If you try to walk an oid that has one value not under a subkey of the walked oid, ucd snmpwalk will return the value while php's snmpwalk will not.

anders at ei dot nu
29-Jan-2003 10:11


It would be nice to be able to specify what snmp version to use ( 1,2c,3 )



For now, I'ts hardcoded in ext/snmp/snmp.c



change session.version from 1 to 2c or 3 if you need for now..



i.e 



session.version = SNMP_VERSION_1;



to:

session.version = SNMP_VERSION_2c;

steve at ourabode dot org
26-Mar-2002 03:54


Timeout is in MICRO seconds.

1,000,000 &micros = 1 s

layer2 at www dot com
29-Aug-2001 08:52


Something to care about in dealing with snmpwalk:<BR>

While walking the MIB, snmpwalk puts info that gets into an array, and that is correct.<BR>

The trouble happened when snmpwalk needs to collect information from instances that contains subinstances (i.e. walking .1.2.3.4.5 and having instances like 1.1, 1.2, 1.3): in this case it gets info and passes into an array, but when walking the array, each value is preceeded by 'Counter32: '.<BR>

I've tested this in many ways and it always happened the same way.

john at antefacto dot com
17-Aug-2001 08:21


Ah. That's why all of our SNMP stuff was timing out anytime there was any load on the system. Sigh. A waste of two weeks trying to debug snmp....



 Even the snmpcmd manpage doesn't give a

unit for timeout.

billf at freebsd dot org
01-Aug-2001 02:22


for the poster wondering what the

timeout field was measured in:



from the ucd-snmp header file snmp_api.h:



    long    timeout; 

    /* Number of uS until first timeout

    then exponential backoff */

jmartinson(AT_nospam)info234.com
20-Jun-2001 07:41


A quick router device view:



<?

include "header.html";



$host = "auscr1";

$community = "tellme";

                     

$sysDescr = snmpget("$host","$community","system.sysDescr.0");

$ifDescr = snmpwalk("$host","$community","interfaces.ifTable.ifEntry.ifDescr");

$ifIndex = snmpwalk("$host","$community","interfaces.ifTable.ifEntry.ifIndex");

$ifAdminStatus = snmpwalk("$host","$community","interfaces.ifTable.ifEntry.ifAdminStatus");

$ifOperStatus = snmpwalk("$host","$community","interfaces.ifTable.ifEntry.ifOperStatus");

$ifLastChange = snmpwalk("$host","$community","interfaces.ifTable.ifEntry.ifLastChange");

                                          

print "<table border=1 bgcolor=#ffffff><tr><td>$host</td></tr></table><br>";

print "<table border=1 bgcolor=#ffffff><tr><td>$sysDescr</td></tr></table><br>";

print "<table border=1 bgcolor=#ffffff>";

print "<tr> 

        <td>ifIndex</td>

        <td>ifDescr</td>

        <td>ifAdminStatus</td>

        <td>ifOperStatus</td>

        <td>ifLastChange</td>

        </tr>";

             

for ($i=0; $i<count($ifIndex); $i++) {

        print "<tr>";

        print "<td>$ifIndex[$i]</td>";

        print "<td>$ifDescr[$i]</td>";

        print "<td>$ifAdminStatus[$i]</td>";

        print "<td>$ifOperStatus[$i]</td>";

        print "<td>$ifLastChange[$i]</td>";

        print "</tr>";

}            

print "</table>";



?>

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snmpwalk

Описание

Список параметров

Возвращаемые значения

Примеры

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