Date: Sat, 08 Sep 2007 18:46:02 +0330 From: "Bahman M." <b.movaqar@adempiere.org> To: Joao Barros <joao.barros@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: ADSL Bandwidth Monitoring Message-ID: <46E2BCB2.9010909@adempiere.org> In-Reply-To: <70e8236f0709080735p1e60453cp435f58127c7a35fd@mail.gmail.com> References: <46E2AEA8.4060403@adempiere.org> <70e8236f0709080735p1e60453cp435f58127c7a35fd@mail.gmail.com>
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Joao Barros wrote: > On 9/8/07, Bahman M. <b.movaqar@adempiere.org> wrote: >> Hi all, >> >> I have an ADSL connection at home. >> >> When I'm _uploading_ files the whole upload bandwidth is consumed; so >> far so good. >> >> But when _downloading_ no more than 30~40% of download bandwidth is >> consumed. >> >> The guys in the ISP say they've granted me the requested bandwidth but >> this is not what I see in action. >> >> How may I know the real bandwidth limits of my connection? Any tool or >> trick? Or maybe I'm misunderstanding something about ADSL bandwidth? > > First of all you have to take into account that with an ADSL > connection, I'm guessing PPPoE, you have overhead due to protocol > tunnelling. The connection is a simple ethernet connection (sorry, I don't know the exact technical name) which requires no authentication and setup (I have a valid static IP address). On a fresh system, I just need to specify gateway IP and my own machine's and plug the cable in and it starts working > Next you must verify that you don't max out your upload while testing > download speed. From my tests, up to 90% upload bandwidth usage is > safe and shows no impact on download performance. Tested while not uploading and the results were the same. > And for last, use multiple download sources as only one may not be enough. > Find http or ftp mirrors close to you (on your ISP for ex) and start > downloading multiple ISOs for example. > I tested the connection by downloading 2~3 files simultaneously and used 'bmon' as Mel suggested in another reply (thanks to him). As I'd already guessed the RX don't get bigger than 30~40% of the expected bandwidth. I performed the test with some other files and there was no difference. > Note: Make sure the device taking care of the PPPoE connection is > powerful enough to support your bandwidth. For example, I still have a > Linksys WRT54GL as router and I can easily see 100% cpu usage and load > 1 and thus I can't use my max contracted bandwidth. Use the modem or > a powerful enough machine running FreeBSD of course :) > Don't worry about that! My connection is such slow that even the primitive NICs and CPUs would handle it :-) Thanks, Bahman
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