On Thursday 15 February 2007 06:11, Eero Volotinen wrote: > http://pronics.fi/~eero/mirrors/binarydump OK I checked this and yes you have packet losses, but unfortunately snapshot is too small to understand if SACKS are wrong or not. 06:06:49.785205 IP 193.208.0.234.56126 > 193.166.3.2.9394: . ack 2206753 win 65535 <nop,nop,timestamp 32804475 1413946819,nop,nop,[|tcp]> (The [|tcp] hides the information we want :) ) Could you redo one binary trace , adding the '-s 1600' option to tcpdump so that captured frames are complete, and not truncated ? You could do another test, but disabling tcp_sack : # echo 0 >/proc/sys/net/ipv4/tcp_sack - To unsubscribe from this list: send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html