Hello together I have some problems with the Delay, Jitter from Iperf.
How does Iperf calculate the Jitter Delay? When I measure with UDP the Jitter Delay over a 100Mb-Ethernet, the results are ok (avg delay: 124us, avg jitter 31us). I'm on my Bachelor-Thesis and I have to measure the Delay, Jitter and Packet loss ratio over a PPP-Device (3G) to a Server in the Internet in both ways, up- and downlink. Iperf UDP downlink, 1800k (no loss): avg Delay: 8.35ms avg Jitter: 0.43ms (standard deviation). When I variate the bitrate, the change is about 1 or 2ms. This result can't be correct, because with thrulay the udp delay is avg 75ms. With NDT I have an avg RTT 1142ms After Internet research the Delay over 3G is between 70ms.....180ms How does Iperf calculate the Delay? Is it a problem over 3G UMTS? I work with Iperf 2.0.4-4 for UDP, on the computers is Ubuntu 9.04 installed. Thanks Regards Tobias ------------------------------------------------------------------------------ Join us December 9, 2009 for the Red Hat Virtual Experience, a free event focused on virtualization and cloud computing. Attend in-depth sessions from your desk. Your couch. Anywhere. http://p.sf.net/sfu/redhat-sfdev2dev _______________________________________________ Iperf-users mailing list Iperf-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/iperf-users
