[lug] network issue/redhat linux 8.0

[John Karns]

On Thu, 5 Dec 2002, Tony Dyson said:

> A dim memory says these 3Com cards like to default to IRQ5. Is something
> else trying to use that? It smells like some kind of hardware conflict.
> 3Com used to supply a DOS utility to reconfigure the card. You might try
>   forcing a different interrupt that way.
>
> The parameter on the modules.conf options line is evidently making
> something unhappy too.
>
> I've seen adverse comments about these NIC's & Linux in the past. Do you
> have a different brand that you could try?

Are you confusing it with the 3c509?  Those were 10mb ISA cards which had
a PnP feature which one was better off disabling.  And a DOS utility to
set IRQ & PnP.  The 3c59x however (aka cyclone) is a PCI card.  I've had
little trouble with them, although I did have a problem with one recently
after upgrading to a faster mobo - the driver loaded ok, but all
throughput was garbled.


On Thu, 5 Dec 2002, r ms said:

>
>> options 3c59x irq=5
>>
>>> what does /var/log/messages contain about the module used?
>>
>> The latest log entry:
>>
>> Dec  4 21:06:31 localhost kernel: 00:0a.0: 3Com PCI 3c905B Cyclone
>> 100baseTx at 0xd800. Vers LK1.1.18-ac
>> Dec  4 21:06:31 localhost kernel: PCI: Setting latency timer of device
>> 00:0a.0 to 64
>> Dec  4 21:06:31 localhost insmod: Warning: ignoring irq=5, no such

While it probably doesn't have much of an effect, the attempt to force the
interrupt in the options line is superfluous, as the machine BIOS sets the
IRQ before Linux boots, and the driver doesn't set the IRQ.  Try examining
/proc/interrupts to see if you have a conflict.  Do you have dhclient or
dhcpcd running to set the IP@?  If so, you should see a reference to dhcp
in the system logs.

----------------------------------------------------------------
John Karns                                        jkarns at csd.net