37

To troubleshoot a network problem I would like to inquire the real network "speed" for a given network adapter, which can be seen when opening the "status" of a network connection under Windows: Speed setting

However I want to inquire this over the command line or with a small, separate tool because I need to request this for multiple network connections and don't trust the user to fetch the information properly. The network card "Speed/Duplux" setting is always "Auto Negotiate", so I can't tell from that what "Speed" I will get.

60

Try this WMI query:

wmic NIC where NetEnabled=true get Name, Speed

That should give you the speed of all active network connections.

  • 1
    and if you have sed wmic NIC where NetEnabled=true get Name, Speed | sed -e s/000000000/Gbit/ | sed -e s/000000\b/Mbit/ – Jamie Cook Nov 24 '14 at 2:04
  • 1
    That WMI query worked in Windows 8 cmd, but in Windows 7, I had to use this: wmic NIC where "NetEnabled='true'" get "Name,Speed" It seems that the cmd shell was trying to interpret the ',' as a space or command separator. PowerShell has this problem, also. Thanks for putting me on the right path! – The Dude Nov 25 '14 at 19:39
  • Just what I needed! You are a great person ;n; +1 (P.S. is that bits-per-second?) – Cardinal System Apr 26 at 20:43
  • @CardinalSystem Yes, it's bits per second. – Indrek Apr 27 at 21:35
5

From Indrek's answer:

wmic NIC where NetEnabled=true get Name, Speed

will work in the Command Prompt. For PowerShell use:

wmic NIC where "NetEnabled='true'" get "Name,Speed"

(The where clause, and any get attribute (like Name and Speed), must be enclosed in double quotes and comma-delimited).

// Edit #1: GET expression Name,Speed has to be enclosed within a single set of double quotes. Get expressions may not have a space between them

  • That's strange. It works without the quotes here. – DavidPostill Jun 4 '16 at 10:40
  • @DavidPostill It breaks the GET expression in PS (once you add a second item). – Louis Oct 20 '16 at 5:32
  • 1
    Ah. Confirmed. You should add to your answer that the quotes are required for PowerShell and not needed in a cmd shell. – DavidPostill Oct 20 '16 at 7:18
2

I would like to contribute to your share. If you need to run sed in Windows, you can download UnxUtils, then extract sed.exe into c:\Windows\System32

Then when you pipe with sed like you suggested, it works. (Windows 8.1)

Thanks.

wmic NIC where NetEnabled=true get Name, Speed | sed -e s/000000000/Gbit/ | sed -e s/000000\b/Mbit/
  • \b doesn't work with sed in Cygwin. What works for me is [^0]. Or, to be complete: s/000000[^0]/Mbit/ – pepoluan Apr 11 '16 at 2:30
  • Except that will swallow the first non-zero character after 000000, which might not be what you want. – Wodin Apr 28 '16 at 8:13
0

You can also use:

cat /sys/class/net/enp6s0/speed

Or when it's eth0, to determine your speed connection (100 or 1000):

cat /sys/class/net/eth0/speed

  • so why is the answer downvoted.? – Green Tree Feb 13 at 12:02
  • I don't know, it seems still zero here :S. Ow mabye because this is Linux only.. – Melroy Mar 1 at 18:00

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