I belive that this bug may be similar, but not exactly like bugs 9514 & 10441. I have an ASUS P2B-DS motherboard with a DEC 935 network card. This ethernet card operates at 10Mbit and included both BNC and RJ45 connectors. I have been running RH 6.1 with no problems. Recently, I upgraded to 6.2 and now the tulip driver is _somewhat_ loaded. (Sorry, my limited knowledge of the driver architecture limits my description.) The driver appears to load fine from boot and I can ifconfig eth0 and I get the proper MAC address. However, I cannot pass any traffic on the wire. I have looked at the card itself during operation and it seems that the media lights do not light up properly (this should occur during driver load). My suspicion is therefore that the net tulip driver chooses the wrong media type (I'm using the 10baseT, not the thin) - even though the card is capable of autosensing. To work around this problem I have successfully loaded the old_tulip driver and am able to use the ethernet.
The "old_tulip" module was not included in the distribution until the 6.2 release, so that is why you are seeing the problem. I am forwarding this to the support techs so that the problem and resolution make it to a FAQ.
*** Bug 108714 has been marked as a duplicate of this bug. ***