On (2013-04-08 03:46 +0200), Johan Borch wrote: > of a single session with a RTT of only 8ms? The performance is the same if > I use 2 switches and the clients directly connected as if i use routers > between. Any idea what it could be?
bw * delay = window so window / delay = bw 64k*8 / 0.008 = 64000kbps = 64Mbps To achieve 40Mbps, you'd need 40M*1000/8 * 0.008 = 48kB window make sure with tshark what your actual window size is, don't trust iperf. Best thing is to configure OS TCP stack to window scaling and dont touch iperf window settings, I don't know why, but they just seem to break stuff. Also never measure network with TCP, measure network with UDP, measure TCP stack of hosts with TCP. -- ++ytti _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp