intel card one interface goes offline if forcing to 100/full

[Brian McKee]

On Tue, Mar 10, 2009 at 8:33 PM, Asif Iqbal <vadud3 at gmail.com> wrote:
> On Tue, Mar 10, 2009 at 8:16 PM, Gregory Zill <gregory at r3g.net> wrote:
>> The two switches' respective ports connecting to the dual-port card
>> may not be set identically, forced to the necessary 100/full, I
>> suspect.

>>> I noticed my intel card has two port connected to two different
>>> network through two different switches. I were able to force the eth2
>>> to 100/full using ethtool. However eth3 (the second interface)
>>> disables as shown in `Link detected:' when forcing it to 100/full
>
> I had my network engr guy check that and  they are both set to
> 100/full. That is why
> I think it is very odd

Any chance you can reverse them and see if the behaviour follows the
switch port/cables or the eth card ports?

And/or try a new cable on a known good std switch or even a passing
laptop etc....

Brian