AFAIK, there is no such thing as half duplex gigabit.
There's only one mode in gigabit link, and it is full duplex.
-Carlos
Black, Michael (IS) @ 23/9/2011 11:32 -0300 dixit:
Hmmm..Realtek's doc indicates 8168 should support full duplex at 1Gb.
So perhaps your switch doesn't support full duplex at 1Gb.
What switch are you plugged in to?
*Options* *Description*
Auto Negotiation Auto negotiation the supported link speed and duplex
mode with connected device. (default)
10Mbps/Half Duplex Set link speed and duplex mode to 10Mbps/Half Duplex.
10Mbps/Full Duplex Set link speed and duplex mode to 10Mbps/Full Duplex.
100Mbps/Half Duplex Set link speed and duplex mode to 100Mbps/Half Duplex.
100Mbps/Full Duplex Set link speed and duplex mode to 100Mbps/Full Duplex.
1000Mbps/Full Duplex Set link speed and duplex mode to 1000Mbps/Full
Duplex. (*)
*NOTE:* (*) RTL8101E, RTL8102E and RTL8139 series NIC only support
10/100 Mbps.
Michael D. Black
Senior Scientist
NG Information Systems
Advanced Analytics Directorate
------------------------------------------------------------------------
*From:* [email protected]
[[email protected]] on behalf of MARMONIER Cédric
[[email protected]]
*Sent:* Friday, September 23, 2011 8:48 AM
*To:* [email protected]
*Subject:* EXT :Re: [Winpcap-users] rate limitation
If I set my Ethernet Card in 1Gb mode, there is always the problem but if I
configure my Ethernet Card in 100Mb/Full-Duplex, there is no problem (I send
an 100Mb flow): it is very strange.
When I am in 1Gb mmode, I can't choose the duplex mode.
=> My Ethernet Card is Realtek RTL8168C : I updated the driver with the last
version
-----Message d'origine-----
De : [email protected]
[mailto:[email protected]] De la part de Mark Pizzolato -
WinPCap-Users
Envoyé : mercredi 21 septembre 2011 03:33
À : [email protected]
Objet : Re: [Winpcap-users] rate limitation
On Tuesday, September 20, 2011 at 6:27 PM, "Fish" (David B. Trout) wrote:
MARMONIER Cédric wrote:
[...]
> But when I connect my PC to a Gigabit Ethernet switch (D-LINK
> DGS-1008D), my PC send a 45Mb flow : it isn't the switch which drop
> packets but the function sendpacket() which run slower (no packets are
> lost).
>
> Do you know why ?
This does not sound like a WinPCap problem.
This sounds like a hardware problem.
Try a different switch.
I agree it is likely a hardware problem. It may be an incompatibility
between the NIC and switch's ability to 'auto detect' the Link Speed and
Duplex. You can try to 'hard set' the Link speed to 1Gb and Duplex to Half
and then Duplex to Full and see if this changes your results.
Good Luck.
- Mark Pizzolato
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------------------------------------------------------------------------
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--
Carlos G Mendioroz <[email protected]> LW7 EQI Argentina
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