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lara400
Asked: 2016-04-17 07:12:07 +0800 CST

Getting NIC speed from Powershell on Win2008 R2 Server

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I am trying to get the NIC speed via Powershell on some of my servers. For my lab server I know there is a 1GB NIC in there. However, when I do this via Powershell I get the below weird number:

 Get-WmiObject -Class Win32_NetworkAdapter -filter "Name LIKE '%Intel%' OR Name LIKE '%HP%' OR Name LIKE '%Broadcom%'" | select name, speed | ft -AutoSize

name                                                       speed
----                                                       -----
Intel(R) 82580 Gigabit Network Connection    9223372036854775807

The speed I am getting back is "9223372036854775807" - I checked the WMI property for Speed in Win32_NetworkAdapter and it returns "Bits per second" - however, in conversion this looks like a lot more than 1GB per second?

Any idea on why I am getting this back and also the best way of determining NIC speed (and to confirm that it definitely is 1GB)?

As I have many servers - I really would prefer to know the best way of getting this info if you have any ideas.

windows windows-server-2008 networking powershell nic

2 Answers

  1. Get a list of Domain Computers (Run in AD):

    Import-Module ActiveDirectory Get-ADComputer -Filter * | ForEach-Object {$_.Name}

    Or from a file:

    $computers = Get-Content -Path computers.txt

    For multiple computers:

    foreach ($comp in $computers) {

   echo $comp
   Get-WmiObject win32_networkadapter -ComputerName $comp  | Select Name,Manufacturer,Description ,AdapterType,Speed,MACAddress,NetConnectionID | Where-Object {$_.AdapterType -like "*Ethernet*"}

}

    That will print for each computer in list:

    Name            : Broadcom NetLink (TM) Gigabit Ethernet
Manufacturer    : Broadcom Corporation
Description     : Broadcom NetLink (TM) Gigabit Ethernet
AdapterType     : Ethernet 802.3
Speed           : 1000000000
MACAddress      : B8:AC:6F:41:B5:D3
NetConnectionID : Ethernet

    Note: Speed is in bits per second, convert to Gbps or Mbps as necessary

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  2. For the original query, if you replace speed with @{n="Speed";e={$_.speed/1mb}}, it return a calculated result, in Mega-bits.

    If you do @{n="Speed";e={$_.speed/1gb}}, it will return result in Gbits respectfully.

    Powershell does not aware what the original measure is, and MB/mb is the same to powershell. Thus if you need the result to be in bytes, you have manually divide by the result by another 8, @{n="Speed";e={$_.speed/1mb/8}}

    The altered script would be:

    Get-WmiObject -Class Win32_NetworkAdapter -filter "Name LIKE '%Intel%' OR Name LIKE '%HP%' OR Name LIKE '%Broadcom%'" | select name, @{n="Speed";e={$_.speed/1gb}} | ft -AutoSize

    And this alternative format @{n="name";e={$_.property *operations*}} would work for any select in powershell.

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