fedora-list Digest, Vol 6, Issue 157

John Krische john at sysop.com
Fri Aug 13 21:20:03 UTC 2004


Attn: Andy Green

Well, that helped some, but did not solve the problem.  DL speed holds 
to normal for about 2 MB of file now instead of 1MB, but then dies again.

any other things I should be looking at?

John K.

>>original 2.6.5 kernel or the updated 2.6.7 kernel (yum update), download
>>> speed does something odd.  It jumps up to about 180K/Sec, which causes
>>> alarms to go off at our ISP since that's above a T1's theo. limit, and
>>> then, shortly after 1.1 MB of file has downloaded, the connection speed
>>> plummets to less than old 28K dialup, ie, 2 K/Sec or less.  It's still
>>> downloading mind you, but barely.
> 
> 
> Could this be the TCP scaling problem?  Recent 2.6 kernels include the 
> capability to use >1 TCP scaling.  Some routers choke on it.
> 
> echo 0 > /proc/sys/net/ipv4/tcp_window_scaling






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