Automate SNMP configuration on multiple ESXi hosts

I have created a PowerCLI script that can be used for applying SNMP configuration on multiple ESXi hosts of a vSphere Cluster by replicating configuration from a reference ESXi host.

Leave a comment with your email address if you have a question and I will get back to you soon.

Enjoy the script 🙂

  1. <#
  2.   configure-snmp-on-esxi.ps1
  3.  
  4.   Configure SNMP settings on multiple ESXi hosts using a reference host settings
  5.  
  6.   .History.
  7.   2020/04/09 - 0.1 - Reza Rafiee - First version
  8.  
  9.   .Variables.
  10.   $VC: vCenter Server
  11.   $targethosts: Target ESXi host cluster
  12.   (to apply on single ESXi host refer to line30)
  13.   $refesxhost : Reference ESXi host
  14.  
  15. #>
  16.  
  17. $VC="vCenter Server Name"
  18. $targethosts="Target cluster name"
  19. $refesxhost = "Reference ESXi host name"
  20.  
  21.  
  22.  
  23. Connect-viserver $VCServer
  24. $refhost = get-vmhost $refesxhost
  25. $refesxcli = Get-EsxCli -VMhost $refhost -V2
  26. $snmp=$refesxcli.system.snmp.get.invoke()
  27. write-host "SNMP configuration on " $refesxhost," (Refernce Host): "
  28. $snmp
  29.  
  30. $vmhosts = get-cluster -name $targethosts | get-vmhost
  31. <#If you want to apply the snmp config on a single host
  32.  then enter ESXi host name for $targethosts variable and
  33.  replace the above line with the below line:
  34.  
  35.  $vmhosts = get-vmhost -name $targethosts
  36.  
  37.  #>
  38.  
  39.  
  40. foreach ($vmhost in $vmhosts){
  41.  
  42. $esxcli = Get-EsxCli -VMHost $vmhost -V2
  43.  
  44. <#Reset SNMP settings to factory default on the target host prior to
  45. reconfigure SNMP settings on that host#>
  46. $snmpreset = $esxcli.system.snmp.set.CreateArgs()
  47. $snmpreset.reset = $true
  48. $esxcli.system.snmp.set.Invoke($snmpreset)
  49.  
  50. write-host "SNMP settigs has been reset to default on $vmhost"
  51. #SNMP settings reset complete
  52.  
  53. $esxcli = Get-EsxCli -VMHost $vmhost -V2
  54. $arguments = $esxcli.system.snmp.set.CreateArgs()
  55.  
  56. #The below arguments (if statements) cannot be null hence we skip the null ones
  57.  
  58. if ($snmp.communities -ne $null) {
  59. $arguments.communities = $snmp.communities
  60. }
  61.  
  62. if ($snmp.engineid -ne "$null") {
  63. write-host "engineid is nt null"
  64. $arguments.engineid = $snmp.engineid
  65. }
  66.  
  67. if ($snmp.targets -ne $null) {
  68. $arguments.targets = $snmp.targets
  69. }
  70.  
  71. if ($snmp.users -ne $null) {
  72. $arguments.users = $snmp.users
  73. }
  74.  
  75. if ($snmp.privacy -in ("none", "AES128")) {
  76. $arguments.privacy = $snmp.privacy
  77. }
  78.  
  79. if ($snmp.remoteusers -ne $null) {
  80. $arguments.remoteusers = $snmp.remoteusers
  81. }
  82.  
  83. if ($snmp.authentication -in ("none", "MD5", "SHA1")) {
  84. $arguments.authentication = $snmp.authentication
  85. }
  86.  
  87. if ($snmp.v3targets -in ("none", "auth", "priv")) {
  88. $arguments.v3targets = $snmp.v3targets
  89. }
  90.  
  91. $arguments.hwsrc = $snmp.hwsrc
  92. $arguments.largestorage = $snmp.largestorage
  93. $arguments.loglevel = $snmp.loglevel
  94. $arguments.notraps = $snmp.notraps
  95. $arguments.enable = $snmp.enable
  96. $arguments.port = $snmp.port
  97. $arguments.syscontact = $snmp.syscontact
  98. $arguments.syslocation = $snmp.syslocation
  99.  
  100. $esxcli.system.snmp.set.Invoke($arguments)
  101.  
  102. $newsnmp=$esxcli.system.snmp.get.Invoke()
  103. write-host "SNMP configuration on", $vmhost, ": "
  104. $newsnmp
  105.  
  106. }

Create multiple VDS port groups using PowerCLI

This is a PowerCLI script for creating multiple portgroups in a VMware Distributed Switch.

It can be helpful for migrating from Nexus 1000v to VMware VDS.

Please note that this script is only for creating switchport port groups (single VLAN) and not for trunk port groups (VLAN range).

If you have any question about the script, please leave a comment.

<#
    Create_VDS_PortGroups

    Creates Port Groups in a VMware Distributed Switch

    Feed the script with "portgroups.csv" file with portgroup names and vlan IDs and then update $VDS with the terget VDS_Name.
	
	portgroup.csv must have "portgroup" and "vlan" header to identify the portgroup name and corresponding vlan ID.
	
	Please note that this code is only for creating switchports (single VLAN) not trunk port groups (VLAN range).
	
	I wrote this script for migrating portgroups from Nexus 1000v to VMware Distributed Switch
    
    .History.
	2020/03/06 - 0.1 - Reza Rafiee	- First version

#>

############################
$PGs = Import-CSV .\portgroups.csv
$VDS = "VDS Name"
$RefPG = Get-VDPortgroup -Name "Reference Portgroup Name"

ForEach ($PG in $PGs) {
    $newPG = Get-VDSwitch -Name $VDS |
    New-VDPortgroup -Name $PG.portgroup  -ReferencePortgroup $RefPG.Name | Set-VDPortgroup -Notes $PG.description
    Set-VDVlanConfiguration -VDPortgroup $newPG -VlanId $PG.vlan -Confirm:$false 
	}
############################