On Sun, 24 May 2015 00:27:02 -0700 Gary Roach <gary719_li...@verizon.net> wrote:
> On 05/22/2015 01:19 PM, Bob Proulx wrote: > > Darac Marjal wrote: > >> Gary Roach wrote: > >>> When I start a download, it starts at 50M for the first few > >>> seconds and then drops to 500K to 100K range. > >> Finally, don't rule out the possibility that your ISP is throttling > >> you. While you may be synced at 50M and may be able to transfer at > >> that for short periods (and thus, the ISP can rightly claim that > >> you have a 50M connection), they could conceivably throttle your > >> connection in the longer term. > > I think this is quite the most likely possibility. I have only > > anecdotal reports from friends but what I hear is that often ISPs > > allow a full speed burst but then throttle for long term steady > > state data transfer. That matches your reported behavior exactly. > > This allows customers to run a speed test and have it report full > > speed but prevent them from getting that speed for a long download > > such as a full system upgrade or a large install ISO image > > download. Are you sure your ISP isn't throttling you? > > > > Bob > I wouldn't put anything past those jackasses but am still attempting > to gather information. Would wireshark be a good tool to do an in > depth diagnosis of the problem? I've gotten a little side tracked > with another problem but plan to get back to this in the next couple > of days. Any comments will be appreciated. If you have shell access to a box somewhere, you can run "iperf" to get an idea of the performance of the link between you. Obviously, the closer to you, the better. Take a look at the "--interval" parameter, so you can see how/if performance degrades over time. "--dualtest" might also be helpful. There are probably guides out there on how to get the best results from it, the man page doesn't really do much except list all the options. There may be better ways, but this is the one I typically use. Wireshark would be more suited to analyze the actual traffic, if you suspect something may be wrong there. Petter -- "I'm ionized" "Are you sure?" "I'm positive."
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