Hello,

I'm using Linux 2.6.32.9 on a technologic systems TS-7250 SBC board, with
the ep93xx_eth driver for networking. On three identical, but independent
systems I noted that the system is unreachable after a while. On a serial
terminal I noted that only the TX counter counts onward, RX stays where it is,
no matter if i try to ping from or to the system. Wireshark tells me exactly
that too: I see helpless ARP requests which gets answered, but no ICMP. The
system doesnt receive the ARP requests, and just sends another one.
With a simple program which sends small packages in a fast pace I can
reproduce the problem after several seconds (additional CPU load seem to
provoke the problem even more). Remove and replug the network cable doesn't
solve the problem, but ifup/down does. I don't see any messages in dmesg,
memory is still available.

Is it a network driver problem or even a network stack problem?

It looks to me like a race condition in the network driver, which can be
triggered by short packets.

What can I do to track the problem further down?

Thanks for hints,
Stefan

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