Messages in this thread | | | From | Maciej Sołtysiak <> | Subject | Networking gets extremely laggy after a random amount of time. | Date | Wed, 26 Nov 2003 11:58:36 +0100 |
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Hi,
I have been writing about this problem several times, always without receiving any pointers on how to approach this.
Networking gets extremely laggy after a random amount of time. Sometimes it is 5 minutes, sometimes 30hours, sometimes 5 days.
By laggy, I mean that each connection that is established from or to the linux box (even on the same LAN) is very slow and jitters. SSH and telnet sessions jitter. When I press a key for a few seconds it writes in batches, like: eeee e ee ee eeeeeee e ee
Other streams like http, smtp are very slow.
The only thing that fixes this is to do a /etc/init.d/networking restart
It has been happening on Debian woody and sarge with kernels from 2.4.16 (the earliest tested) to 2.4.23-rc4 and even on each 2.6 kernel I tried on that box.
The machine is not loaded, and connections I make that are on localhost device are ok, when these conditions are on.
It propably is NIC related, but I do not know how to investigate this. I have two 3com 3c905c-tx NICs. One of them is connected to the LAN, and the other is connected to a hub and is sometimes used to listen in promiscous mode to investigate traffic.
I would appreciate any pointers on where to look for problems.
Best regards, Maciej
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