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Need a powercli script to search for VM by subnet

Posted on 2013-02-04
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Last Modified: 2013-04-09
I have the following script to search for VM by ip address:

$tgtIP = "172.25.xxx.xxx"
$vms = Get-VM
foreach($vm in $vms){
  
  $vmIP = $vm.Guest.IPAddress
  foreach($ip in $vmIP){
    if($ip -eq $tgtIP) {
      Write-Host "Found the VM!" 
      $vm.Name 
    }
  }
}

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But I need one to search for all VMs on a particular subnet... could this script be modified to do so?
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Question by:Thaidog
3 Comments
 
LVL 35

Accepted Solution

by:
Joseph Daly earned 668 total points
ID: 38852001
I would think this would be very simple with a few changes. This should work using the -like parameter.

$tgtIP = "172.25.xxx."
$vms = Get-VM
foreach($vm in $vms){
  
  $vmIP = $vm.Guest.IPAddress
  foreach($ip in $vmIP){
    if($ip -like '$tgtIP*') {
      Write-Host "Found the VM!" 
      $vm.Name 
    }
  }
}

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0
 
LVL 126

Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE^2)
Andrew Hancock (VMware vExpert / EE MVE^2) earned 668 total points
ID: 38852022
scripts are included in

VMware Community Pack
http://www.virtu-al.net/featured-scripts/vmware-powerpack/

to find VMs by IP Address and MAC Address
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LVL 1

Assisted Solution

by:Sitaram Pamarthi
Sitaram Pamarthi earned 664 total points
ID: 38854704
Hi, You can do like this.

Function Test-SameSubnet {
param (
[parameter(Mandatory=$true)]
[Net.IPAddress]
$ip1,

[parameter(Mandatory=$true)]
[Net.IPAddress]
$ip2,

[parameter()]
[alias("SubnetMask")]
[Net.IPAddress]
$mask ="255.255.255.0"
)

if (($ip1.address -band $mask.address) -eq ($ip2.address -band $mask.address)) {$true}
else {$false}

}

$tgtIP = "172.25.xxx.xx"
$vms = Get-VM
foreach($vm in $vms){
 
  $vmIP = $vm.Guest.IPAddress
  foreach($ip in $vmIP){
if(test-Samesubnet -Ip1 $tgtIP -Ip2 $ip -SubnetMask "255.255.255.0") {
      Write-Host "Found the VM in same subnet"
      $vm.Name

    }
  }
}

In the above code Test-SameSubnet is a function that takes two IPs and a subnet mask as arguments and determines if both IPs belong to same subnet. below is the source of Test-Samesubnet function.

http://get-powershell.com/post/2010/01/30/Determining-if-IP-addresses-are-on-the-same-subnet.aspx

Hope this helps.
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