Honestly not that important but there's a spelling error in Example #1: "Snm2_pwalk"
Best to fix it so it doesn't confuse.
(PHP >= 5.2.0, PHP 7, PHP 8)
snmp2_walk — Fetch all the SNMP objects from an agent
$hostname,$community,$object_id,$timeout = -1,$retries = -1
snmp2_walk() function is used to read all the values from
an SNMP agent specified by the hostname.
hostnamecommunityobject_idnull, 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.
timeoutretries
Returns an array of SNMP object values starting from the
object_id as root or false on error.
Example #1 snmp2_walk() 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
Honestly not that important but there's a spelling error in Example #1: "Snm2_pwalk"
Best to fix it so it doesn't confuse.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.