Tech Support Forum - View Single Post - [SOLVED] Slow file sharing on LinkSys Router network

napergman · 12-30-2007, 08:31 PM

Well, I connected the other wireless pc to the network via cable and got some interesting results. The NIC runs at 100Mb on both PC's and when connected to LAN ports 1 and 2 on the LinkSys router, the transfer rate was blistering fast. My 17.7Mb file took less than a second to move from one pc to the other. I ran QCheck and the transfer rates using TCP ranged between 80Mb and 93Mb depending on which pc was source, packet size and protocol/test done. The UDP throughput was about 50Mb regardless of configuration. I can live with these rates *smile*.

Interestingly though, when I forced both links down to 10Mb rate, the performance degraded significantly with TCP although the UDP throughput was OK. I would have EXPECTED a reduction somewhat in line with the link speed reduction (10x reduction) but it was more like 40x. The best throughput with TCP was 2Mb with a 1Mb packet size and it degraded to around 800kb when the packet size was reduced to 100Kb. The UDP performance was very acceptable at about 7Mb. Is the TCP throughput explainable to you?

As I look back over the results, I can see that I'd be most happy if I could wire my wife's PC into the router and abandon wireless. This would require some creative work on my part as there is no easy way to snake a Cat 5 up two floors from the basement. With this in mind, do you have a recommendation for a fast wirelss router? Is there such a beast!

Thanks for your help.

12-30-2007, 08:31 PM	#12 (permalink)
napergman Registered User Join Date: Oct 2007 Posts: 20 OS: WinXP Home	Re: Slow file sharing on LinkSys Router network Well, I connected the other wireless pc to the network via cable and got some interesting results. The NIC runs at 100Mb on both PC's and when connected to LAN ports 1 and 2 on the LinkSys router, the transfer rate was blistering fast. My 17.7Mb file took less than a second to move from one pc to the other. I ran QCheck and the transfer rates using TCP ranged between 80Mb and 93Mb depending on which pc was source, packet size and protocol/test done. The UDP throughput was about 50Mb regardless of configuration. I can live with these rates smile. Interestingly though, when I forced both links down to 10Mb rate, the performance degraded significantly with TCP although the UDP throughput was OK. I would have EXPECTED a reduction somewhat in line with the link speed reduction (10x reduction) but it was more like 40x. The best throughput with TCP was 2Mb with a 1Mb packet size and it degraded to around 800kb when the packet size was reduced to 100Kb. The UDP performance was very acceptable at about 7Mb. Is the TCP throughput explainable to you? As I look back over the results, I can see that I'd be most happy if I could wire my wife's PC into the router and abandon wireless. This would require some creative work on my part as there is no easy way to snake a Cat 5 up two floors from the basement. With this in mind, do you have a recommendation for a fast wirelss router? Is there such a beast! Thanks for your help.