Interactive Windows IPv6 Neighbour Scan (powershell)

ipv6scan.ps1

param (
    [int]$InterfaceIndex
)

$interfaces = Get-NetIPInterface -AddressFamily IPv6

if (-not $InterfaceIndex) {
    Write-Host ""
    Write-Host "Available IPv6 Interfaces:"
    $interfaces | Sort-Object ifIndex | Format-Table -AutoSize ifIndex, InterfaceAlias

    $InterfaceIndex = Read-Host "Enter the Interface Index to scan"
}

$selected = $interfaces | Where-Object { $_.ifIndex -eq $InterfaceIndex }

if (-not $selected) {
    Write-Host ""
    Write-Host "Invalid interface index."
    exit 1
}

Write-Host ""
Write-Host "Scanning IPv6 neighbors on: $($selected.InterfaceAlias) (Index: $InterfaceIndex)"

ping -n 1 ("ff02::1%" + $InterfaceIndex) | Out-Null

$neighbors = Get-NetNeighbor -InterfaceIndex $InterfaceIndex |
    Where-Object { $_.State -in @("Reachable", "Permanent", "Stale") }

if ($neighbors) {
    Write-Host ""
    Write-Host "Neighbors (Reachable/Permanent):"
    $neighbors | Select-Object InterfaceIndex, IPAddress, LinkLayerAddress, State | Format-Table -AutoSize
}
else {
    Write-Host ""
    Write-Host "No reachable or permanent neighbors found on interface $InterfaceIndex." -ForegroundColor Yellow
}