I wont go into details on how to use Test-Connection, there are plenty of ressources doing just that. But I recently discover a very cool way to use Test-Connection against a large number of servers. And as they say, A script is worth a thousand words:
function Check-Online { param( $ComputerName ) Begin { # put live servers into this list $Script:serverlist = @() } Process { If (Test-Connection -Count 1 -ComputerName $_ -TimeToLive 5 -asJob | Wait-Job | Receive-Job | ? { $_.StatusCode -eq 0 } ) { $Script:serverlist += $_ } } End { return $Script:serverlist } } # get computer names from hyper-v $ComputerNames = Get-VM | Select-Object -ExpandProperty Name # check which are online $ComputerNames | Check-Online
Simply feed the Check-Online function a list of computernames (IPs should work just as well) and it will return a list of online servers within seconds.
I think credit for the original code goes to my Lumagate colleague Claus Nielsen who just happens to be a Powershell MVP.
Download script from Technet gallery.
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