I'm running a clean RH 6.1 install, and attempting to configure two NICs,
using DHCP for both.  eth0 comes up OK; eth1 has no IP (as shown by
'ifconfig').  Using 'pump -s' shows valid IPs for both NICs, obtained from
our DHCP server (Windows NT).  'ifconfig' shows zero error counts, and
shows both RX and TX counts for both NICs.  If I set up a host route for
eth1 and ping that host, ping shows the source IP as 0.0.0.0.

I've used two NIC setups so far: two 3Com 3c509Bs, or one 3c509B plus an
SMC Ultra (all ISA cards).  In either case I get no startup errors and the
drivers seem to be running OK.

If I give eth1 a static IP, 'ifconfig' shows all is well.