Screenplay Posted January 24, 2006 CID Share Posted January 24, 2006 I am having problems with my speed. I have cox cable advertised at 4.0. When I do speed test some days I will be up to 5.1 but on others I will be down to .8. What is the deal??? I always keep up with ad aware and virus scans. Plus I have already downloaded the cablenut program (think that is why I get 5.1 sometimes). Any help would be great. P.S. could it be my modem? It is old Surfboard sb3100 Link to comment https://testmy.net/ipb/topic/10736-up-and-down-speed/ Share on other sites More sharing options...
trogers Posted February 10, 2006 CID Share Posted February 10, 2006 Could be that your RWIN setting has been set too precised for a specfic latency value. Example using the RWIN formula RWIN = bandwidth x latency divided by 8 (bit) = ________ KBytes Say you bandwidth is 4000 Kbps and you design your ccs file for a 100 ms latency RWIN = 4000 x 100 / 8 = 50000 Everything is all balanced. You get your throughput of 4000 Mbps. If latency falls to 80 ms, your throughput goes up to 5 Mbps. What happens to your throughput when latency to a particular site is 300 ms? Bandwidth = RWIN x 8 divided by latency Bandwidth = 50000 x 8 / 300 = 1333 Kbps. (compared it to your original bandwidth 4000 Kbps) Now your download speed falls by two-third. Link to comment https://testmy.net/ipb/topic/10736-up-and-down-speed/#findComment-117001 Share on other sites More sharing options...
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