The script below can be used to measure the average IO as a percentage of available bandwidth from the network card(s) of a machine. Similar to the Network information in Task Manager. Where more than one Network interface is fitted, the result will be an average. The script includes a small delay (Start-Sleep) because you probably don’t want to hammer a production machine with too many WMI queries.
For instructions of how to download and run this script see: Run a PowerShell script.
#Get-Bandwidth.ps1
# Measure the Network interface IO over a period of half a minute (0.5)
$startTime = get-date
$endTime = $startTime.addMinutes(0.5)
$timeSpan = new-timespan $startTime $endTime
$count = 0
$totalBandwidth = 0
while ($timeSpan -gt 0) {
# Get an object for the network interfaces, excluding any that are currently disabled.
$colInterfaces = Get-CimInstance -class Win32_PerfFormattedData_Tcpip_NetworkInterface |select BytesTotalPersec, CurrentBandwidth,PacketsPersec|where {$_.PacketsPersec -gt 0}
foreach ($interface in $colInterfaces) {
$bitsPerSec = $interface.BytesTotalPersec * 8
$totalBits = $interface.CurrentBandwidth
# Exclude Nulls (any WMI failures)
if ($totalBits -gt 0) {
$result = (( $bitsPerSec / $totalBits) * 100)
Write-Host "Bandwidth utilized:`t $result %"
$totalBandwidth = $totalBandwidth + $result
$count++
}
}
Start-Sleep -milliseconds 100
# recalculate the remaining time
$timeSpan = new-timespan $(Get-Date) $endTime
}
"Measurements:`t`t $count"
$averageBandwidth = $totalBandwidth / $count
$value = "{0:N2}" -f $averageBandwidth
Write-Host "Average Bandwidth utilized:`t $value %"
“If you stuff yourself full of poems, essays, plays, stories, novels, films, comic strips, magazines, music, you automatically explode every morning like old faithful. I have never had a dry spell in my life, mainly because I feed myself well, to the point of bursting. I wake early and hear my morning voices leaping around in my head like jumping beans. I get out of bed to trap them before they escape” ~ Ray Bradbury
Get-CimInstance - Get a managed resource (storage, network, software etc).