On Tue, 15 Jul 2008, Matt Darnell wrote: > Does anyone know of a bandwidth test that tests the upload with the download? > > All of the ones I can find will test the upload then the download. > > I from experience I have found that a 3M/768K DSL can only do about > 256K/256K simultaneously.
You have a sucky ISP or router. > The only way I have of testing it is with FTP uploads and downloads or > P2P sharing. > > I would like something more formal that would keep the upload speed > the same as the download. VoIP as you know is symmetric. > > The one VoIP test I find doesn't tell you how many calls you can > handle, just if it is VoIP ready. iperf You run a "server" on one site, and a "client" on the other. So on site a: iperf -s -u then on the other site: iperf -c ip.of.site.a -u -b 80K -l 160 That's a one-way test from site B to site A. To do a test both ways, one at a time: iperf -c ip.of.site.a -u -b 80K -l 160 -r To test both ways at the same time: iperf -c ip.of.site.a -u -b 80K -l 160 -d The -b parameter is the bandwidth to use, so start at 80K (one SIP link) and go up from there. The -l is the packet length - VoIP packets are typically 160 bytes. The one thing it can't do it send the packets in a timed manner - simulating an RTP stream... ie. it needs a "packets per second" parameter rather than a bandwidth parameter, but this is usually good enough to find gross problems with links, I've found. Gordon _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- AstriCon 2008 - September 22 - 25 Phoenix, Arizona Register Now: http://www.astricon.net asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users