PHP 7.0.6 Released

    snmp2_walk

    (PHP >= 5.2.0)

    snmp2_walk — Fetch all the SNMP objects from an agent

    Description

    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.

    Parameters

    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.

    Return Values

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

    Examples

    Example #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

    See Also

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

    User Contributed Notes

    Adam
    4 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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