PHP 5.6.0beta1 released

snmp2_walk

(PHP >= 5.2.0)

snmp2_walkFetch all the SNMP objects from an agent

Beschreibung

array snmp2_walk ( string $host , string $community , string $object_id [, string $timeout = 1000000 [, string $retries = 5 ]] )

snmp2_walk() function is used to read all the values from an SNMP agent specified by the hostname.

Parameter-Liste

host

The SNMP agent (server).

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

The number of microseconds until the first timeout.

retries

The number of times to retry if timeouts occur.

R├╝ckgabewerte

Returns an array of SNMP object values starting from the object_id as root or FALSE on error.

Beispiele

Beispiel #1 snm2_pwalk() Example

<?php
$a 
snmp2_walk("127.0.0.1""public""");

foreach (
$a as $val) {
    echo 
"$val\n";
}

?>

Above function call would return all the SNMP objects from the SNMP agent running on localhost. One can step through the values with a loop

Siehe auch

  • snmp2_real_walk() - Return all objects including their respective object ID within the specified one

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User Contributed Notes 1 note

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Adam
2 years ago
After some testing, I have found that SNMPWalk is considerably slower than multiple SNMPGet.

I was aiming to retrieve 6 Objects from a MIB; the device being polled was attached via a 100mbps network link.
I decided to run SNMPGet within a loop to retrieve each Object from the specified OID's.
As these OID's were within the same tree, I then thought about using walk as this would consolidate the data into a single request. I then walked the tree to get the same result.

I subsequently testing the time it took to retrieve this information via microtime().
As a result, you can retrieve 1 walk containing 6 OID's within the same time as requesting 18 OIDs via get.

I hope this helps someone whom is looking to speed up their SNMP requests.
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