snmp2_set
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.
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_idis taken as the root of the SNMP objects tree and all objects under that tree are returned as an array.If
object_idis specified, all the SNMP objects below thatobject_idare 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
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User Contributed Notes
snmp2_walk - [1 notes]
Adam ¶
1 year ago