On Wed, 9 Jul 2003, Max Clark wrote:
> Hi all, > > What configuration changes do I need to make to two freebsd-stable boxes to > fully max out a 6Mbps/220ms network link? This is for bulk 500+MB file > transfers. You need to increase the maximum TCP window size setting (not sure what sysctl it is) to around 256KB to accommodate the bandwidth/latency product. In brief, 6Mb/1500B frames = 500 frames/sec. Using 250ms for simplicity, you need a large enough TCP window to handle 1/4 of that (125 frames x 1500 bytes/frame = 183KB, round up to 256KB) to permit continuous streaming. Note that TCP windows actually only go to 64KB, you need to use TCP window scaling as a multiplier to go beyond that. Both stations must support it. You can find more info on this on the web, look for high-latency/high-bandwidth. KeS _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"