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Tobias, thanks for the information.
The device on my machine is the Broadcom BCM5721, and the reason why I
decided that the driver was at fault is because I found somebody else
online with the same problem and that particular model of Broadcom NIC.
Also to re-update the situation, setting it to 100 mbit didn't
permanently fix the situation, it just made the occurrances of the
problem happen less so I misdiagnosed it as fixed :(
Do you have any advice as to what to look for more in-depth?
I have replaced some of the switching hardware, but not all of it. The
reason why I don't think it is the switch or cables is because direct
system-to-system communication works just fine, it's only when I'm doing
any sort of packet-forwarding (with lvs-nat or just simple iptables
port-forwarding).
Thanks
-Jesse
Tobias Klausmann wrote:
> Hi!
>
> On Mon, 23 Jul 2007, Jesse Cantara wrote:
>> Just a followup: it is definitely a driver issue. The tg3 broadcom
>> kernel module doesn't seem to work properly at gigabit speeds. 100 mbit
>> works fine (which is OK in this situation).
>
> Then I'd look into the matter more closely. We use about 1k
> machines with tg3 chips, some 500 of them in farms using GE links
> and have had no hiccups whatsoever (beyond the usual amount of
> simply broken hardware which was replaced). CErtainly no
> systemativ error.
>
> Regards,
> Tobias
>
> PS: Don't forget that your switching infrastructure might be at
> fault, too.
>
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