<#
configure-snmp-on-esxi.ps1
Configure SNMP settings on multiple ESXi hosts using a reference host settings
.History.
2020/04/09 - 0.1 - Reza Rafiee - First version
.Variables.
$VC: vCenter Server
$targethosts: Target ESXi host cluster
(to apply on single ESXi host refer to line30)
$refesxhost : Reference ESXi host
#>
$VC="vCenter Server Name"
$targethosts="Target cluster name"
$refesxhost = "Reference ESXi host name"
Connect-viserver $VCServer
$refhost = get-vmhost $refesxhost
$refesxcli = Get-EsxCli -VMhost $refhost -V2
$snmp=$refesxcli.system.snmp.get.invoke()
write-host "SNMP configuration on " $refesxhost," (Refernce Host): "
$snmp
$vmhosts = get-cluster -name $targethosts | get-vmhost
<#If you want to apply the snmp config on a single host
then enter ESXi host name for $targethosts variable and
replace the above line with the below line:
$vmhosts = get-vmhost -name $targethosts
#>
foreach ($vmhost in $vmhosts){
$esxcli = Get-EsxCli -VMHost $vmhost -V2
<#Reset SNMP settings to factory default on the target host prior to
reconfigure SNMP settings on that host#>
$snmpreset = $esxcli.system.snmp.set.CreateArgs()
$snmpreset.reset = $true
$esxcli.system.snmp.set.Invoke($snmpreset)
write-host "SNMP settigs has been reset to default on $vmhost"
#SNMP settings reset complete
$esxcli = Get-EsxCli -VMHost $vmhost -V2
$arguments = $esxcli.system.snmp.set.CreateArgs()
#The below arguments (if statements) cannot be null hence we skip the null ones
if ($snmp.communities -ne $null) {
$arguments.communities = $snmp.communities
}
if ($snmp.engineid -ne "$null") {
write-host "engineid is nt null"
$arguments.engineid = $snmp.engineid
}
if ($snmp.targets -ne $null) {
$arguments.targets = $snmp.targets
}
if ($snmp.users -ne $null) {
$arguments.users = $snmp.users
}
if ($snmp.privacy -in ("none", "AES128")) {
$arguments.privacy = $snmp.privacy
}
if ($snmp.remoteusers -ne $null) {
$arguments.remoteusers = $snmp.remoteusers
}
if ($snmp.authentication -in ("none", "MD5", "SHA1")) {
$arguments.authentication = $snmp.authentication
}
if ($snmp.v3targets -in ("none", "auth", "priv")) {
$arguments.v3targets = $snmp.v3targets
}
$arguments.hwsrc = $snmp.hwsrc
$arguments.largestorage = $snmp.largestorage
$arguments.loglevel = $snmp.loglevel
$arguments.notraps = $snmp.notraps
$arguments.enable = $snmp.enable
$arguments.port = $snmp.port
$arguments.syscontact = $snmp.syscontact
$arguments.syslocation = $snmp.syslocation
$esxcli.system.snmp.set.Invoke($arguments)
$newsnmp=$esxcli.system.snmp.get.Invoke()
write-host "SNMP configuration on", $vmhost, ": "
$newsnmp
}
