network stalls on Fedora Core 3

[Keith Fetterman]

I checked /proc/sys/net/ipv4/tcp_ecn and it was set to 0.

After I checked that, I decided to run tcpdump on the remote server and 
the workstation that is having the problem.  What I discovered is that 
after the stall occurs, I can see the workstation sending a TCP request 
to the server. I then see the remote server sending a response back to 
the workstation, but the response TCP packet is never displayed by 
tcpdump on the workstation. After a short pause, I see the workstation 
sending the same packet again.

Now, I am sure the response packet is getting to the workstation because 
  it was receiving data from the server.  Is it possible the the 
workstation is dropping the response packet?

Les Mikesell wrote:
> On Fri, 2005-04-15 at 12:57, Keith Fetterman wrote:
> 
> 
>>You are not going to believe this.  The problem also exists in this 
>>version of Ubuntu.  The only common thread that I can see is between 
>>these two Linux OS's is the 2.6 kernel.  Ubuntu is essentially Debian 
>>underneath.  I did a uname -r on the Ubuntu system.  The kernel is: 
>>2.6.10-5-386
> 
> 
> Can this be a problem with explicit congestion notification?
> If /proc/sys/net/ipv4/tcp_ecn is not 0, it is a possibility.
> 



-- 
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Keith Fetterman                          206-780-5670
Mariner Supply, Inc.                     kfetterman at go2marine.com
http://www.go2marine.com