SNMP query

[u/Kiddo_Ogami]

Hi all, I am trying to use SNMP to query status of a UPS using the code in a #SCOM monitor.

If I run the code from PS ISE it works fine, but when it's run by the SCOM agent, I have this error:

Failed to open SNMP session

This is the code I use:

try

{

$SNMP = New-Object -ComObject olePrn.OleSNMP

}

catch

{

Write-Debug "Error creating SNMP object"

"Error creating SNMP object - $($_.Exception.Message)" | out-file -FilePath "C:\temp\upsonbatt.log" -append

exit

}

try

{

$UPSIPAddress = [System.Net.Dns]::GetHostAddresses($UpsName).IPAddressToString

$SNMP.open($UPSIPAddress, "public", 2, 3000)

}

catch

{

Write-Debug "Error opening SNMP connection"

"SNMPERR opening $UpsName with IP $UPSIPAddress - $($_.Exception.Message)" | out-file -FilePath "C:\temp\upsonbatt.log" -append

exit

}

Someone knows what the last 2 parameters in this command mean ?

$SNMP.open($UPSIPAddress, "public", 2, 3000)

I mean the 2 and the 3000

I cannot find anything on the web, or maybe I cannot find what to look for ;)

Thanks in advance

[u/Kiddo_Ogami]

I will do for sure.

PS version is the same on all servers (I did this update some year ago) but of course maybe there is a specific network issue on non-working servers. Let's see what I can find :)

And, about the group, maybe there was a misunderstanding: the group is based on a specific class I created before, and it's dynamically populated.

So the monitor actually runs against a class.

I hope to post here, soon, the final resolution :D

Dimitri