[lkml]   [2002]   [Aug]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: Linux TCP problem while talking to ?
   From: Meelis Roos <>
Date: Mon, 12 Aug 2002 10:28:10 +0300 (EEST)

Before and after the connetion attempt - looks like the number of bad
segments is increasing so probably not a TCP bug.

Since I can connect to this server fine from different locations, it
looks like something (ISP caches/shapers? cable modem?) is corrupting
specific packets in a reproducible way.

Aparently something is wrong with the checksums.
InErrs gets incremented in three cases:

1) Header too small, unlikely what you see

2) Bad SYN sequences, Abort On Syn in TcpExt would have been
incremented also if this were the case, it was not

3) Bad TCP checksum

Hmmm, do you have messages that say "hw tcp v4 csum failed"
in your kernel logs? Any other interesting kernel messages?
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:27    [from the cache]
©2003-2014 Jasper Spaans. hosted at Digital Ocean