[Winpcap-users] rate limitation

[Carlos G Mendioroz]

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:* winpcap-users-bounces at winpcap.org 
> [winpcap-users-bounces at winpcap.org] on behalf of MARMONIER Cédric 
> [cmarmonier at ifotec.com]
> *Sent:* Friday, September 23, 2011 8:48 AM
> *To:* winpcap-users at winpcap.org
> *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 : winpcap-users-bounces at winpcap.org
> [mailto:winpcap-users-bounces at winpcap.org] De la part de Mark Pizzolato -
> WinPCap-Users
> Envoyé : mercredi 21 septembre 2011 03:33
> À : winpcap-users at winpcap.org
> 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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-- 
Carlos G Mendioroz  <tron at huapi.ba.ar>  LW7 EQI  Argentina