On 08/13/2013 07:09 AM, Marko Vojinovic wrote: > > Hi folks! :-) > > Before I go complain to my ISP, I'd like to hear if anyone can give me > an idea what is going on with my networks... :-) > > I have two machines, with following link properties: > > local --- 20Mbps/2Mbps (GSM wireless) > remote --- 100Mbps/100Mbps (100Mbit LAN connected to optical uplink) > > The remote machine is in another country, cca 2000 km away. It is > connected to a 10Gbit optical link, but only through a 100Mbps switch, > so that caps the bandwidth. > > When transferring large files via wget from remote to local, the > maximum bandwidth that I get is 2Mbps. It *used to be* 20Mbps (couple > of days ago). Occasionally it drops down to 300Kbps (it just happened > as I write this), but after several minutes it gets back up to 2Mbps. > > But it doesn't want to get back up to 20Mbps, which is the max download > throughput for the local machine. > > To test the local link, I opened 15-20 random youtube links > simultaneously in Firefox. It easily capped the full 20Mbps, so the > local link apparently works as advertised. > > Another test of the local link --- I went to > > http://fedoraproject.org/get-fedora > > and clicked the big blue "download now" button, to download the Live > Desktop .iso --- the download manager in Firefox says it will complete > it in 17 hours, since it is downloading at 15 KBps (i.e. 150 Kbps). > This is of course ridiculously slow, for a 20Mbps link. > > All speed numbers are consistently reported by jnettop, KDE network > widget, Firefox download manager and wget. If you suggest some other > tool to measure the throughput, I'll try it out too. > > The remote machine appears to work ok --- I have downloaded and > uploaded (elsewhere) all sorts of things, and it consistently works at > 100Mbps up/down. Downloaded Fedora DVD iso in a couple of minutes. I > can seed torrents from it at 100Mbps no problem (this is currently off > because I'm trying to pull something to the local machine). > > So I believe something is wrong with my local link, but don't know > exactly what --- youtube works, but other things don't. > > Any ideas how to troubleshoot this? > > Also, any ideas what to tell to my ISP? > > I could ask them to look into it, but they just might open a bunch of > youtube links, verify that the link works, and blame the remote machine. > > Any suggestions appreciated. > > TIA, :-) > Marko > > P.S. Before anyone asks --- I *do* know the difference between bits and > bytes, Mbps and MBps, etc. I was careful to provide you with a > case-sensitive units, and I know what I'm talking about. :-) > Check with your ISP -- there may be a way to isolate the transfer to your connection device. For example, I use RCN Cable and there's a way to do a speed test from within the cable modem. I use this to figure out if there are speed issues with my connection or my internal network. For the RCN customers out there, the format is http://xx.speedtest.rcn.net/, where xx is the two character abbreviation of your state (e.g., http://il.speedtest.rcn.net/). It also shows signal and noise levels on the connection (which can indicate corroded cable connecttions, etc.) -- -- Steve -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
