[NTLUG:Discuss] Troubleshooting a network connection

[LEROY TENNISON]

I'm in the middle of installing CentOS 4.2 right now
and have run into a major problem.  I have two NICs in
my PC which worked fine under Red Hat 9.  Now the NIC
(a sis900) which accesses the Internet and gets a DHCP
address from my SMC Barracade DSL "router" doesn't get
an IP address under CentOS.  I know the hardware is
good because this is coming to you from Knoppix 3.2
booted on the "problem" hardware.  I'm going to try
and check the versions of the sis900 driver being
used, I've stopped the firewall temporarily to make
sure that wasn't an issue.  I've tried setting the IP
address and mask with ifconfig as well as the gateway
with route to see if I could ping (without success).

What else can I try?  Any easy way to check driver
versions?  Thanks in advance for any and all help.