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 — Busca todos os objetos SNMP de um agente
$hostname
,$community
,$object_id
,$timeout
= -1,$retries
= -1
A função snmp2_walk() é usada para ler todos os valores de
um agente SNMP especificado pelo hostname
.
hostname
O agente SNMP (servidor).
community
A comunidade de leitura.
object_id
Se null
, object_id
for considerado a raiz da
árvore de objetos SNMP e todos os objetos sob essa árvore serão retornados como
um array.
Se object_id
for especificado, todos os objetos SNMP
abaixo desse object_id
serão retornados.
timeout
O número de microssegundos até o primeiro tempo limite.
retries
O número de tentativas caso ocorram tempos limite.
Retorna um array de valores de objetos SNMP começando pelo
object_id
como raiz ou false
em caso de erro.
Exemplo #1 Exemplo de snmp2_walk()
<?php
$a = snmp2_walk("127.0.0.1", "public", "");
foreach ($a as $val) {
echo "$val\n";
}
?>
A chamada de função acima retornaria todos os objetos SNMP do agente SNMP em execução no host local. É possível percorrer os valores com um 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.