[realtek] Re: problem with dual RTL8139 boards
John A Ogren
Wed Jan 2 14:58:01 2002
> I think I see the problem here ...
> ipadress 192.168.1.1 with netmask 255.255.255.0 will make all adresses
> 192.168.1.x accessible by the interface
> ipadress 192.168.0.1 with netmask 255.255.255.0 will make all adresses
> 192.168.0.x accessible with the interface (and NOT 192.168.1.x)
> (nothing meant for 192.168.1.x will even be sent out on that
> interface, so if you run
> tcpdump, that will suggest the card doesn't work)
Thanks for the suggestion, but I don't think that's the problem. I
assigned the 192.168.0.1 address just to keep the two cards on different
subnets. All my tests trying to reach the local network used the
192.168.1.1 address, and I just changed the physical slot and
eth0.vs.eth1 assignment for different tests.
In the meantime, I have done more tests and I think that I've identified
the problem. There are really two problems:
1. I have to configure the BIOS to use level-triggered interrupts on the
2. I have to make sure to load the kernel module for the eth0 interface
If I use edge-triggered interrupts, or load the kernel module for the
eth1 interface first, then I run into problems accessing the local
network from one or both cards. But if I follow these two steps, I can
access the local net from either card, configured either as eth0 or eth1.
Whew! That was a tricky one to track down. But now I think I'm ready
for the cable modem installer to show up.
Thanks again to you and Donald for your comments.