Checking Duplex mode?

25 Aug 2006 10:34 PM

Conan Kelly

Hello all,

Is there any way to check my NIC's duplex mode (Full-Duplex or Half-Duplex) from Windows.

If not, what other ways can I determine which one it is using?

--
Thanks for any help anyone can provide,

Conan Kelly

26 Aug 2006 1:51 AM

Chuck

On Fri, 25 Aug 2006 22:34:05 GMT, "Conan Kelly" <CTBarba***@msn.com> wrote:

>Hello all,
>
>Is there any way to check my NIC's duplex mode (Full-Duplex or Half-Duplex) from Windows.
>
>If not, what other ways can I determine which one it is using?

Under Local Area Connection - Properties, Configure - Advanced tab, you may have
an entry "Media Type" which should tell you how the computer has it setup. What
is at the other end of the Ethernet cable? If a router or switch, you should
have an indicator light for the connection, that may give you a clue.

--
Cheers,
Chuck, MS-MVP [Windows - Networking]
http://nitecruzr.blogspot.com/
Paranoia is not a problem, when it's a normal response from experience.
My email is AT DOT
actual address pchuck mvps org.

28 Aug 2006 8:11 PM

Conan Kelly

Chuck,

Thanks for your feed back.

I don't have an "Advanced" tab under my NIC's Configuration properties. We are in a Domain environment, so I may not have
permissions/privileges. All of the network connections are attached to a switch (HP Procurve Switch 2626 (J4900B)). As far as I
can tell, the lights on the switch just show a live connection and not necessarily the speed or duplex mode.

I'm asking because I have 2 computers here at my workstation. One has a straight shot to the main switch. The other goes through a
little LinkSys 5(4) port workgroup switch that it shares with the office scanner. On the workgroup switch, it shows full-duplex
between itself --> the scanner and itself --> 2nd computer, but it does not show Full between itself and the main switch. So I
wanted to check my main computer (straight shot to main switch) to see if it is running in full-duplex or half-duplex. I'm
wondering if our main switch is programmed to run in half-duplex only. I won't really be able to tell unless I can see what duplex
mode the individual machines are operating in when they have a straight shot to the main switch.

Thanks again for all of your help,

Conan

Show quoteHide quote

"Chuck" <n***@example.net> wrote in message news:e2ave2hut5lnl8v47icuu6p2jdet29poic@4ax.com...
> On Fri, 25 Aug 2006 22:34:05 GMT, "Conan Kelly" <CTBarba***@msn.com> wrote:
>
>>Hello all,
>>
>>Is there any way to check my NIC's duplex mode (Full-Duplex or Half-Duplex) from Windows.
>>
>>If not, what other ways can I determine which one it is using?
>
> Under Local Area Connection - Properties, Configure - Advanced tab, you may have
> an entry "Media Type" which should tell you how the computer has it setup. What
> is at the other end of the Ethernet cable? If a router or switch, you should
> have an indicator light for the connection, that may give you a clue.
>
> --
> Cheers,
> Chuck, MS-MVP [Windows - Networking]
> http://nitecruzr.blogspot.com/
> Paranoia is not a problem, when it's a normal response from experience.
> My email is AT DOT
> actual address pchuck mvps org.

28 Aug 2006 9:51 PM

Chuck

Show quote Hide quote

On Mon, 28 Aug 2006 20:11:56 GMT, "Conan Kelly" <CTBarba***@msn.com> wrote:

>"Chuck" <n***@example.net> wrote in message news:e2ave2hut5lnl8v47icuu6p2jdet29poic@4ax.com...
>> On Fri, 25 Aug 2006 22:34:05 GMT, "Conan Kelly" <CTBarba***@msn.com> wrote:
>>
>>>Hello all,
>>>
>>>Is there any way to check my NIC's duplex mode (Full-Duplex or Half-Duplex) from Windows.
>>>
>>>If not, what other ways can I determine which one it is using?
>>
>> Under Local Area Connection - Properties, Configure - Advanced tab, you may have
>> an entry "Media Type" which should tell you how the computer has it setup. What
>> is at the other end of the Ethernet cable? If a router or switch, you should
>> have an indicator light for the connection, that may give you a clue.

>Chuck,
>
>Thanks for your feed back.
>
>I don't have an "Advanced" tab under my NIC's Configuration properties. We are in a Domain environment, so I may not have
>permissions/privileges. All of the network connections are attached to a switch (HP Procurve Switch 2626 (J4900B)). As far as I
>can tell, the lights on the switch just show a live connection and not necessarily the speed or duplex mode.
>
>I'm asking because I have 2 computers here at my workstation. One has a straight shot to the main switch. The other goes through a
>little LinkSys 5(4) port workgroup switch that it shares with the office scanner. On the workgroup switch, it shows full-duplex
>between itself --> the scanner and itself --> 2nd computer, but it does not show Full between itself and the main switch. So I
>wanted to check my main computer (straight shot to main switch) to see if it is running in full-duplex or half-duplex. I'm
>wondering if our main switch is programmed to run in half-duplex only. I won't really be able to tell unless I can see what duplex
>mode the individual machines are operating in when they have a straight shot to the main switch.
>
>Thanks again for all of your help,
>
>Conan

Conan,

If you're in a domain, you very probably don't have any ability to do that.

The domain admins probably have somebody whose job is to setup all of the
computer connections. It may be a bad port on the main switch. This would be a
job for the domain admins then.

--
Cheers,
Chuck, MS-MVP [Windows - Networking]
http://nitecruzr.blogspot.com/
Paranoia is not a problem, when it's a normal response from experience.
My email is AT DOT
actual address pchuck mvps org.