Query list of Cisco devices via SNMP

ips.txt

192.168.1.254
192.168.1.253

readSNMP.ps1

# Get a list of all the IPs to check
# Make sure the ips.txt file is in the same directory as this script and each IP is on it's own line
$ips = Get-Content -Path 'ips.txt'
# Set the community string
$commStr = 'public'

foreach($ip in $ips){    
    # Create a new SNMP object
    $snmp = New-Object -ComObject olePrn.OleSNMP

    # Connect to the IP address with the community string,
    $snmp.open($ip, $commStr, 2, 1000)
    # Request the device description (you can change this to a different tag if you need to or add another)
    $result = $snmp.get('.1.3.6.1.2.1.1.1.0')
    # write the result to the console
    Write-Output "Processing $ip"
    Write-Output $result
    Write-Output "---------------------------"
}