Ping Sweep Subnets with PowerShell

1..255 | % {echo "192.0.2.$_"; ping -n 1 -w 100 192.0.2.$_ | Select-String ttl}

PS C:\Ping-Subnet.ps1

This script only works for /24 subnets! Modify this command as needed for other scenarios:
1..255 | % {echo  192.0.2.; ping -n 1 -w 192.0.2. | Select-String ttl}

Current IP Address:

192.0.2.25

[1.] Ping currently attached subnet 
[2.] Enter /24 subnet to ping
[3.] Exit

$Log = "results.txt"
Remove-Item -Force $Log -ErrorAction Ignore

$ipv4 = (Test-Connection -ComputerName (hostname) -Count 1).IPV4Address.IPAddressToString

function Print-Options() {
	Write-Host "`n[1.] Ping currently attached subnet `n[2.] Enter /24 subnet to ping`n[3.] Exit"
	$opt = Read-Host "`n`nChoose"
	if([string]::IsNullOrEmpty($opt)) {
		Write-Warning "Invalid choice selected. Exiting."
	}
	else{
		return $opt
	}
}

Write-Host "`nThis script only works for /24 subnets! Modify this command as needed for other scenarios:" 
Write-Host "1..255 | % {echo "192.0.2.$_"; ping -n 1 -w 100 192.0.2.$_ | Select-String ttl}"

Write-Host "`nCurrent IP Address:`n"
$ipv4 
	
$opt = Print-Options

switch($opt){
	1{#
		$ipv4Subnet = ($ipv4.split(".") | select -First 3) -join "."
	}
	2{#
		$ipv4Subnet = Read-Host "`nEnter first 3 octets of /24 subnet. i.e. 10.1.1"
	}
	3{Exit}
	Default{"Invalid choice selected."}
}

#Ping Subnet
1..254 | % {echo "$ipv4Subnet.$_"; ping -n 1 -w 100 "$ipv4Subnet.$_"  | Select-String ttl | tee $Log -Append}
#Strip blank lines from log
(gc $Log) | ? { -not [String]::IsNullOrWhiteSpace($_) } | set-content $Log
#Remind user where login is located
Write-Host "Results are saved to $Log"