function Start-VM.Wait
{
    begin
    {
        $timeout = 5 * 60 * 1000
        Initialize-XenServer:Aliases Start
    }
    process
    {
        if ($_.is_a_template -or $_.is_control_domain)
        {
            return
        }
        if ($_.allowed_operations -notcontains "start")
        {
            Write-Warning("{0} cannot be started" -f $_.name_label)
            return
        }

        Write-Verbose("Starting {0}..." -f $_.name_label)
        Start-VM $_

        for ($count = 0; $count -le $timeout / 500; $count += 1)
        {
            $metrics = Get-VM.GuestMetrics $_
            if ($metrics -ne $null -and $metrics.networks.Count -gt 0)
            {
                Write-Verbose("VM {0} started" -f $_.name_label)
                return
            }
            Start-Sleep -m 500
        }

        Write-Warning("Timeout starting {0}" -f $_.name_label)
   }
}