Dell PowerEdge T20: Unable to detect on board network card with CentOS 5.5

[mahtheo]

I'm having issue to detect te on board network card for my Dell PowerEdge T20. In fact when I install Centos 6 on the server, I can detect and et get my network card work fine. But when I install the CentOS 5.5 it is impossible to detect the network card.

Can someone please help me solve this issue?

Thanks.

[TrevorH]

First why would you try to install CentOS 5.5 when the "current" CentOS 5 is 5.11. Second, why would you try to install CentOS 5 at all now given that it goes end of life in approximately 6 months time and there will be no more security fixes for it.

If you must use CentOS 5 use the latest 5.11 as that will have newer device drivers in its newer kernel and your unsupported network cards might be supported. Better still, don't use 5 at all.