[NTLUG:Discuss] Network saturation?

[MadHat]

Kyle_Davenport at compusa.com wrote:
> 
> How do you measure throughtput?  Have you tried ntop?  If the problem is
> surviving a soft boot, it is more likely network card problems.  I'd search for
> issues involving the card, and run Donald Becker's card diagnostics.
> 

Also, depending on the card, there are memory leak issues with kernels <
2.2.13 that can cause network problems.  I had this problem with an
Intel Ether Express Pro 100 (or something like that).  Upgrading to
2.2.13 fixed it for me.

> __________________________________________
> 
> Brian <briank at hex.net> on 01/13/2000 09:36:41 AM
> 
> Please respond to discuss at ntlug.org
> 
> To:   discuss at ntlug.org
> cc:    (bcc: Kyle Davenport/Is/Corporate/CompUSA)
> Subject:  [NTLUG:Discuss] Network saturation?
> 
> Scenario: Box 1 is a stock RH6.1 install on a Dell Latitude laptop.  Box
> 2 is a highly-modified SuSE 6.1 install.  Both running 2.2.x kernels.
> Linked via 10BaseT hub, no other nodes.
> 
> Just after both machines are booted up, network throughput between the
> two machines is somewhere around 1MB/sec.  After a few hours of network
> activity and whatnot, throughput *drastically* drops to about 2KB/sec.
> netstat shows nothing out of the ordinary in the way of dropped packets,
> etc.  Surprisingly, a 'shutdown -r' on both machines fails to correct
> the problem.  Throughput on the SuSE box outbound via a ppp connection
> is normal under all circumstances.
> 
> Where do I start to look to diagnose this?
> 
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-- 
MadHat